FileOptimizer (English) 
Sunday, March 15 2015 . 02:47 PM
FileOptimizer is an advanced file optimizer featuring a lossless (no quality loss) file size reduction that supports: .3GP, .A, .AAI, .ACC, .AIR, .APK, .APNG, .APPX, .AVS, .BAR, .BMP, .BPL, .BSZ, .CBT, .CBZ, .CDR, .CDT, .CHM, .CHS, .CHW, .CPL, .CSL, .CSS, .DCX, .DEB, .DES, .DIB, .DLL, .DOC, .DOCM, .DOCX, .DOT, .DOTM, .DOTX, .DRV, .DWF, .DWFX, .EASM, .EPDF, .EPUB, .EXE, .FAX, .FB2, .FITS, .FLAC, .FPX, .FXG, .GALLERY, .GALLERYCOLLECTION, .GALLERYITEM, .GIF, .GRS, .GZ, .HDR, .HRZ, .HTM, .HTML, .ICO, .INK, .IPA, .IPK, .IPSW, .ITA, .ITZ, .JAR, .JFI, .JFIF, .JIF, .JNG, .JP2, .JPC, .JPE, .JPEG, .JPG, .JS, .JSON, .KML, .KMZ, .KSF, .LIB, .LZL, .M4A, .M4B, .M4P, .M4R, .M4V, .MDB, .MDT, .MDZ, .MHT, .MHTML, .MIF, .MIFF, .MIX, .MIZ, .MKA, .MKS, .MKV, .MMIP, .MNG, .MP3, .MP4, .MPD, .MPP, .MPT, .MSI, .MSP, .MST, .MSZ, .MTV, .MVZ, .NAR, .NBK, .NOTEBOOK, .O, .OBJ, .OCX, .ODB, .ODF, .ODG, .ODP, .ODS, .ODT, .OEX, .OGA, .OGG, .OGV, .OGX, .ONE, .OSK, .OST, .OTB, .OXPS, .P7, .PALM, .PBM, .PCC, .PCD, .PCDS, .PCX, .PDB, .PDF, .PFM, .PGM, .PIC, .PICON, .PICT, .PK3, .PNG, .PNM, .POTM, .POTX, .PPAM, .PPM, .PPS, .PPSM, .PPSX, .PPT, .PPTM, .PPTX, .PSB, .PSD, .PTIF, .PTIFF, .PUB, .PUZ, .R2SKIN, .RDB, .RMSKIN, .RVT, .S3Z, .SCR, .SGML, .SLDASM, .SLDDRW, .SLDM, .SLDPRT, .SLDX, .SPL, .STZ, .SUN, .SVG, .SVGZ, .SWC, .SWF, .SYS, .TAR, .TGZ, .THM, .TIF, .TIFF, .VBX, .VDX, .VICAR, .VIFF, .VLT, .VSD, .VSS, .VST, .VSX, .VTX, .WAL, .WBA, .WBMP, .WEBP, .WMZ, .WSZ, .XAP, .XBM, .XHTML, .XL, .XLAM, .XLC, .XLM, .XLS, .XLSM, .XLSX, .XLTM, .XLTX, .XLW, .XML, .XMZ, .XNK, .XPI, .XPM, .XPS, .XSF, .XSL, .XSLT, .XSN, .XWD, .ZIP, STICKYNOTES.SNT, and THUMBS.DB file formats among others.

It keeps the behavior of the file untouched, but with its size reduced thanks to several recompression and optimization techniques.

FileOptimizer 5 running under Windows 8

FileOptimizer 4 running under Windows 8 (Metro like style)

FileOptimizer 4 running under Windows 8 (Luna style)

FileOptimizer 4 running under Windows 7

FileOptimizer 4 running under Windows XP

FileOptimizer 4 running under WINE with Kubuntu 12.04

Quick facts
- Simple program interface.
- Easy to use.
- Several third party tools integrated in one same tool (plugins).
- Easy automation via command-line.

Key features
- Suitable for home users that need to speedup file transfers no matter if they are in email attachments, P2P or shared upload servers.
- Suitable for webmasters to increase the page load speed.
- Suitable for web developers to reduce content weight.
- Suitable for desktop developers in any platform (Windows, Linux, MacOS, ...) to reduce distribution sizes and reduce load times.
- Suitable for mobile developers (Android, iOS, Windows Phone, ...) to reduce distribution sizes and reduce load times.
- Suitable for server administrators that could integrate FileOptimizer via command-line.
- Suitable for content creators and distributors to reduce content weights.

Drag the files you want to optimize to the files grid in FileOptimizer, right click with the mouse to open the contextual menu, and then click on Optimize. This will process all supported files added, and overwrite them with the optimized version.

Alternatively you can add the files and directories to process on the program's command-line, or dragging them to the executable file. A context menu for Add files, also does it.

By default, FileOptimizer will remove additional metadata, and other unneeded information, but will keep original files in your recycle bin just in case you want to further modify the originals.

FileOptimizer context menu

Different engines are automatically used depending on the file type:

- AdvanceCOMP 1.20 beta -
- APNG Optimizer 1.3 -
- CSSTidy 1.3 -
- DeflOpt 2.07 -
- defluff 0.3.2 -
- Document Press Version 6.01 -
- FLACOUT 07/03/2014 -
- Flasm 1.62 -
- Gifsicle 1.87 -
- Ghostcript 9.15 -
- GNU Strip 2.25 -
- ImageMagick -
- ImageWorsener 1.2.0 -
- jhead 3.00 -
- jpegoptim 1.4.2 -
- jpegtran 9 -
- jsmin 2013-03-29 -
- Leanify - (
- libwebp 0.4.3 -
- mkclean 0.8.7 -
- mozjpeg 3.00 -
- MP3packer 2.04 -
- mp4v2 2.0.0 r504 -
- OptiPNG Hg 20121021 -
- PCXLite 1.0 -
- PngOptimizer 2.4.1 -
- PETrim 2.93 -
- PNGOUT 02/13/2015 -
- pngrewrite 1.4.0 -
- pngwolf -
- rehuff -
- tidy-html5 c63cc39 -
- TruePNG -
- ZLib 1.2.8 -
- zRecompress 2.12 -

FileOptimizer is provided free of charge covered by the GNU Lesser General Public License (LGPL). Of course if you are using it in a commercial environment, a small donation will be highly appreciated.

- Operating System: Windows 2000, XP, 2003, Vista, 2008, 7, 8.x or 2012 (x64 compatible).
- 32 Mb of free memory.
- 50 Mb of disk space available.

Currently FileOptimizer is only localized in english.


- Full distribution including Ghostcript plugin in EXE installer format (23.8 Mb.) or in plain ZIP format (41.8 Mb.).: FileOptimizer 32 and 64 bit versions with all plugins including Ghostcript one.

- Source code in 7Z format (460 Kb.): Embarcadero C++ Builder XE7 source code, Visual C++ 2013 gifsicle, Visual C++ 2013 jpegoptim and Visual C++ 2013 JSMin).

Voluntary donate using the Paypal the amount of money you choose to support FileOptimizer development. It is safe, secure and convenient.


Frequently Asked Questions (FAQ)
Why are several downloads available?
Available downloads come separated in a binaries (executables) form, suitable for x86 and x64 architectures, and in a source code archive. Both are usually available in several package formats.

What is the sense of FileOptimizer, if standalone tools are already available?
Indeed you can manually execute the commandline tools that FileOptimizer uses as plugins, but this will be probably less comfortable. Specially if you consider you will need to execute one or another depending on the file format, and to chain some of them to obtain best results.

What is different in FileOptimizer compared to similar tools?
General idea on tools like PNGGauntlet, ImageOptim, RIOT, etc is essentially the same.
FileOptimizer is built-in with lots of plugins that allow it to handle a big variety of file formats. Optimized files are usually smaller than in competing products, or comparable at worst. It is easy to use, and at the same time easy to automate. Is a native Win32 application, being compact and fast, and works portable with no external dependencies nor access to the system registry. Finally it is free and open source.
At the moment, it is not much mature, lacks some features, and is not configurable at all.

Are optimized files identical to the original ones?
Optimized files, will look identical to the original ones, but internally they will be different in order to achieve the size reduction.
For images, bit depth reduction is used when possible. For instance an image encoded with 24 bit color depth could be resampled to 8 bit color depth if 256 colors of less are used. Quality should not be affected after the transformation.

Why are original file stamps not preserved after optimization?
FileOptimizer supports restoring original file attributes once it has been recompressed. This includes creation, and modification timestamps, but also read-only, system, archive and hidden attributes. To enable it, mark the checkbox "Keep file attributes" under "Options -> General".

Have the optimized files same degree of compatibility as the original ones?
Generally yes, they have the same degree of compatibility. The exception is JPEG images, when you have enabled the User arithmetic encoding option. It generates smallest files with the same quality, but require recent software to render them.

Will optimized files load faster?
Definitively yes, optimized files are smaller, less information needs to be transferred from the internet, of from the local disk, and will load faster in a direct proportion with the size reduction.
Decompression speed of the optimized files is also proportional to the size reduction, because used compression algorithms are asymmetric (slow compression and fast decompression).

Does optimized files work on other platforms than Windows?
Yes, since they are the same format as the original ones, they will continue to work, no matter if they are rendered in a web browser, an Android or iOS application, or any other desktop program.

Why is the recompression process so slow?
The speed of the recompression depends on the particular format of the file.
Noticeably PNG processing is the slowest, because the brute-force recompression to squeeze them. As oposite, PDF and JPEG files should be encoded pretty fast.

Does it work on other platforms than Windows?
FileOptimizer is reported to work in some environments under UNIX based operating systems with Wine.
For other platforms, you will need to install a virtual machine such as VirtualBox with Windows XP or later.

Why a particular format is not supported?
Even if I do my best to add new format support to FileOptimizer, I may have missed some.
If the format to add has available a Windows command-line tool to optimize it, it can be easily integrated on FileOptimizer, so please, let me know.

How can I disable a particular plugin?
Simply remove the desired plugin from the Plugins32 and Plugins64 folder, and FileOptimizer will not use it.

Can I prevent certain file formats from being processed?
If they are supported by FileOptimizer, unless you could remove all the plugins used to treat this format, it will not be possible.
The workaround would be to not add those type of files.

I can appreciate some quality loss on PDF optimization. Why?
PDF are recompressed with no loss of quality, but images can be downsampled, and so on, allow certain lost of quality, specially at high zoom levels. You can control it under Options -> PDF -> Profile.

How is the command line syntax?
FileOptimizer command line arguments work like:
C:\PROYECTOS\FileOptimizer\Win32\Release\FileOptimizer64.exe "C:\PROYECTOS\FileOptimizer\_Tests\_ - copia"\
- C:\PROYECTOS\FileOptimizer\Win32\Release\FileOptimizer64.exe: Is the full path where FileOptimizer executable is.
- "C:\PROYECTOS\FileOptimizer\_Tests\_ - copia"\: Is the full path of the folder to recursively process. Be aware enclosing it with double quotes as in the example, which is Windows mandatory if the folder contains spaces, or extended characters.
Alternatively you can specify only one single file instead of a folder:
C:\PROYECTOS\FileOptimizer\Win32\Release\FileOptimizer64.exe "C:\PROYECTOS\FileOptimizer\_Tests\_ - copia\"
- C:\PROYECTOS\FileOptimizer\Win32\Release\FileOptimizer64.exe: Is the full path where FileOptimizer executable is.
- "C:\PROYECTOS\FileOptimizer\_Tests\_ - copia\": Is the full path of the file to process.

Why my HTML, CSS or JS files are not optimized being them supported?
As of version 6.50, optimization of CSS, HTML, Javascript and its derivatives is supported. They follow the same lossless concept as other formats, so once compressed they will render and look exactly the same as the original, but with a reduced file size.
Unfortunately those optimizations may cause your files to not be editable anymore by WYSIWYG tools such as Dreamweaver, and to avoid risks they are disabled by default.
To enable them, simply go to Options->CSS->Enable Tidy; Options->HTML->Enable Tidy and Options->JS->Enable JSMin.

Why there is a donate button being the program free?
FileOptimizer is free either for personal and commercial usage. I have spent hundreds of hours in creating, developing, researching, supporting, testing and maintaining it, so if you consider a donation is worth my effort, it is highly appreciated, but not mandatory. Program will work as the full version without any limitations, no matter if you have donated or not.

How much should I donate?
There is no minimum nor maximum in the donations. Simply consider the benefit it is reporting to you, and how the compensation you will give to the future of FileOptimizer should be. Donations of even 1 euro, are welcome the same as 1000 euro.

Where is latest source code?
Source code for releases is available in the Download section above.
Latest deveolpment code is available in the SVN repository.

Where can I send suggestions, comments and bug reports?
Better place for easily followup comments, suggestions and bug reports is on the Discussion page at Sourceforge.

How can I contribute the project?
If you want to contribute and actively participate in the evolution of FileOptimizer, your help is highly appreciated.
You can donate money, or send patches and improvements in the source code, or even send suggestions, or bug reports.

Why is FileOptimizer available in warez portals?
Recently I have found some Torrent sites, as well as warez portals offering repackaged FileOptimizer distributions.
Be warned that those sites usually include malware in their packages, mostly adware to give them incomes with no effort nor credit to the original authors, so if you opt to get elsewhere, you are not only underestimating my work, but also putting your PC in risk.
Obviously, the author, me, has no relationship with those sites, and what is more important, I am not seeing any advantage on pirating a software which is already free.
Remember that FileOptimizer is free, and open source, being always available as direct download from its official page:

7.30 - 2015/03/15
- Default optimization level is now 5: Normal, instead of 9: Best.
- Fixed wrong percent calculation (Dmitry, Spotted Cow).
- Minor optimizations.

7.20 - 2015/03/13
- FileOptimizer is now able to partially detect file types by its contents instead of file extensions (BMP, DLL, FLAC, GIF, GZ, JPG, MKV, MP3, MP4, PCX, PDF, PNG, SWF, TIFF, WEBP, and ZIP). More to come later.
- Added custom PDF profile to allow specifying desired downsampling DPI (stratos chatzi, Special, Newtomic).
- Added new column extension between file and original on the grid to allow sorting by filetypes (Nico919).
- Added INI option BeepWhenDone=false to beep and notify used when optimization is complete (Special).
- Added INI option FilenameFormat=0 (0: full path+filename; 1: only filename). (To Do: 2: driveletter + “:”+partial path + filename; 3: driveletter + “:”+partial path if fits+”...” last part of filename) to specify how File grid column is displayed (Jaff).
- Information window now sorts extensions supported alphabetically, and better formats them.
- Improved window layout performance by enabling double buffering.
- Added .GALLERY, .GALLERYCOLLECTION, .GALLERYITEM, .INK, .NBK, .NOTEBOOK and *.XNK file extensions to the ZIP tool chain (maadjordan).
- Better handling of obsolete .INI preferences.
- Improved alternate colors in grid to look better on different Windows color schemes.
- Fixed wrong percentage calculation for big files due to integer overflow (Dmitry, Juan).
- Fixed grid column sorting not working properly for certain types (Nico919).
- Updated libwebp to 0.4.3.
- Updated ImageMagick to
- Updated Leanify daily binaries.
- Some minor optimizations and code cleanup.

7.10 - 2015/02/20
- Added Matroska support with mkclean for .mkv, .mka, and .mks file extensions (SpanishDogg).
- Added XML (.xml, .fb2 .xsl, .xslt) support with Leanify.
- Added LUA (.lua .luac) support with Leanify.
- Allow concurrent executions of different FileOptimizer instances over different file sets.
- Added more PDF profiles, including without downsampling, 100 dpi, 200 dpi and 600 dpi (stratos chatzi).
- Added 250 dpi setting for PDF (Special).
- Added INI option ExcludeMask="" to specify paths (folder/files) that contain it as substring will be excluded (Tomasz W.).
- Exclusion list can now optionally contain more than one substrings if separated by semicolon (;).
- Added INI option ZIPRecurse=false prevent Leanify inside ZIP files.
- Added INI option XMLEnableLeanify=false enable Leanify on XML files.
- Added INI option LUAEnableLeanify=false enable Leanify on LUA files.
- Allow optimizing JPEG files when copy metadata is enabled by using new --keep-exif switch as well as inside ZIP files (Jaff).
- Added .DEB, and .IPK file extensions to the GZ tool chain (maadjordan).
- Added .FXG and .KML file extensions to the XML tool chain (maadjordan).
- Added .BAR, .CDR, .CDT, .CSL, .DES, .FXG .IPSW, .KMZ, and .SWC file extensions to the ZIP tool chain (maadjordan).
- Disabled ImageMagick for GIF optimization because in some cases it does quantization, and so on, causes quality loss (Vivil).
- Implemented Restore defaults in options dialog to return to factory settings.
- Add preference option for ExcludeMask (Tomasz W.).
- Add option for ZIPRecurse.
- Added LUA options tab.
- Added XML options tab.
- Add hints on Options pages with supported file types.
- Made options dialog accept it faster by preventing changing the theme if not modified.
- Slightly faster startup times.
- Added Leanify to the JPEG tool chain.
- Added Leanify to the EXE tool chain.
- Added .rdb and .gft extensions to the ZIP tool chain.
- Slightly smaller PDF recompression by using dDetectDuplicateImages=true Ghostcript switch.
- Fixed log levels in Options dialog.
- Updated to jHead 3.00.
- Updated ImageMagick to
- Updated PNGOUT to 02/13/2015.
- Better quality and smaller PDF by adding -dOptimize=true -dConvertCMYKImagesToRGB=true -dColorConversionStrategy=/sRGB -dColorImageDownsampleType=/Bicubic -dGrayImageDownsampleType=/Bicubic -dMonoImageDownsampleType=/Bicubic.
- Updated TruePNG to
- Upgraded distributions to 7-Zip 9.38.
- Minor source code improvements.

7.00 - 2015/01/21
- Added FLAC compression using FLACOUT (DotDotDot).
- Added MP4 compression (.mp4 .m4a .m4b, .m4p, .m4r .m4v .acc) using mp4v2 (Francisco Eirea Bito-on).
- Added Autodesk Revit (.rvt) and Solidworks formats (.sldprt, .slddrw, .sldasm) to the OLE tool chain (maadjordan).
- Added .BSZ .GRS .ITA .MVZ .PK3 .R2SKIN .STZ .WBA extensions to ZIP toolchain (Jaff).
- Added eDrawings (easm) to the ZIP tool chain (maadjordan).
- Added SVG extension to GZ/SVG tool chain.
- Integrated Leanify compression for GZ, SWF and ZIP formats.
- Added TAR support with Leanify.
- Updated Leanify 0.4.2 daily binaries with Windows XP compatibility. Thanks JayXon.
- Added DWF extension to the ZIP tool chain (maadjordan).
- Added .ksf, .wsz, .wal, .wmz, .mdz, .miz, .s3z, .xmz, .itz, .osk, .rmskin, .mmip, .msz extensions to the ZIP toolchain (Jaff).
- Added .vlt extension to the GZ toolchain (Jaff).
- Launch TruePNG before PNGOut to improve PNG compression (trlkly).
- Added OCX and VBX extensions to the DLL toolchain.
- Improved GIF compression ratio upgrading to gifsicle 1.87 (custom build).
- Better GIF compression ratio adding --crop-transparency and if metadata should be removed --no-comments --no-extensions --no-names (Vivid).
- Unpacked TruePNG.exe to avoid false positives with Symantec AVs (LayZee).
- Improved WEBP compression ratio updating to libwebp 0.4.2.
- Improved GZ, MNG, PNG, and ZIP compression ratio updating to AdvanceCOMP 1.20 beta.
- Upgraded to Ghostcript 9.15.
- Removed ImageMagick from the JPEG toolchain because it can cause quality loss (deluge).
- Brand new plugin execution, easier to mantain, and also more efficient.
- Enhanced keep file attributes option to also restore file last access time.
- Updated APNG Optimizer to 1.3.
- Updated mozjpeg to 3.00 which improves compression ratio, and fixes Photoshop incompatibilities (Lard).
- Updated TruePNG to (Jaff).
- Updated jpegoptim to 1.4.2 (custom built) (Jaff).
- Updated ImageMagick to
- Updated PngOptimizer to 2.4.1.
- Added ini options bBMPCopyMetadata=false, bGIFCopyMetadata=false, bMiscCopyMetadata=false, bPCXCopyMetadata=false, bTIFFCopyMetadata=false to control copying metadata for other filetypes.
- Do not suffix shortcuts on the installed with x86 or x64, since only once will be available (trlkly).
- Added Leanify to PNG and ICO tool chains.
- Fixed reopening FileOptimizer when closed minimized from the taskbar (d4k0).
- Fixed Keep file attributes not properly restoring file modification timestamp (Tomasz W. and ksf).
- Skipped files now have the Skipped status in the Status column instead of Pending.
- Support Android 9-patch images by only allowing pngwolf, defluff and leanify to process them, and thus disabling advpng, deflopt, optipng, pngoptimizer, pngout, pngrewrite and truepng which seem to broke them (Tomasz W.).
- Cancel optimization is now faster.
- Remove Control+Alt+X accelerator in installer shortcuts (AdamDobay).
- Improved GUI drawing performance.
- Internal build number now matches subversion repository revision.
- Better performance updating to ASMLib 2.35.
- Updated to NSIS 3.0 beta 1.
- Removed Launch wording in installer shortcuts (David Mártínez).
- Slight WINE compatibility improvements (Jesus Alcaras).
- Make sure file still was not deleted before processing (A user).
- Launched plugins now do with the same process priority as FileOptimizer (A user).
- Small installer/uninstaller improvements.
- Upgraded to C++ Builder XE7 Update 1.
- Upgraded distributions to 7-Zip 9.35.
- cppcheck sanity fixes (Armin).
- Source code migrated to a subversion repository at

6.80 - 2014/04/28
- Added Nokia Refocus/SmartCam .NAR and Opera extensions .OEX extensions to the ZIP tool chain (Jaff).
- Added .JPE and THM extension to the JPEG tool chain (Jaff).
- Added the /y switch on TruePNG implemented in 6.70 which will cause it to ask for overwriting existing file each time the plugin was used.
- Fixed a cosmetic problem where skipped files were counted sometimes in the stats as producing a size saving.
- Minor source code improvements.

6.70 - 2014/04/27
- Faster PDF compression upgrading to Ghostcript 9.14.
- Improved deflate compression by better combining deflopt and defluff.
- Improved JPEG compression ratio including jhead.
- Improved PNG compression ratio including TruePNG.
- Improved GIF compression ratio upgrading to gifsicle 1.83 (custom build).
- Upgraded jpegoptim to 1.3.1 (custom build with libjpeg 9).
- jsmin build is now faster in both Win32 and Win64 versions.
- Updated to ImageMagick
- Fixed a bug introduced in 6.50 that could cause files with extensions longer than 3 characters to not be processed.
- Some minor optimizations and code cleanup.

6.60 - 2014/04/26
- Fixes extra title bar on Metropolis and Windows themes (trlkly).
- Reenabled jpegtran as in 5.90 because sometimes it is better than mozjpeg (webfork).
- Installer now transparentlly detects OS bitness, and extracts only 32 or 64 bit binaries (trlkly).
- Unpacked mozjpeg plugin to avoid antivirus false positives (Ryan Hietpas).
- Installer version now properly registers on Add/Remove Programs.
- Upgraded to C++ Builder XE6.
- Project cleanup.

6.50 - 2014/04/15
- Added HTML optimization support with tidy-html5 (Metallicow).
- Added CSS optimization support with TidyCSS.
- Added JS optimization support with jsmin (custom built).
- Added DCX to the PCX tool chain.
- Added ini option HTMLEnableTidy=false to enable tidy-html5 when processing HTML files. When activated HTML files will be optimized, and be visually equal to the original, but may prevent the to be edited.
- Added ini option CSSEnableTidy=false to enable CSSTidy when processing CSS files. When activated CSS files will be optimized, and be visually equal to the original, but may prevent the to be edited.
- Added ini option CSSTemplate=low to set compression template in CSTidy, ranging from low (safer and less compression), to highest.
- Added ini option JSEnableJSMin=false to enable jsmin when processing JS files. When activated JS files will be optimized, and be visually equal to the original, but may prevent the to be edited.
- Added EXE options tab.
- Added HTML options tab.
- Added CSS options tab.
- Added JS options tab.
- Excecute plugins passing short file names to avoid path size limitations.
- Enhanced General options tab with DoNotUseRecycleBin (DotDotDot).
- Added a Stop command to give up any pending optimization.
- Implemented a donate button in the website and in the application. Contribute with the amount you consider my work deserves.
- Reorganized help file with different sections (webfork).
- Added tooltips in ribbon buttons.
- Make about Window close with ESC and RETURN.
- Totally rewritten Messagebox management for increased accessibility and flexiility.
- Optimized internal icons.
- Replaced 7-Zip SFX installer with NSIS 3.00a2 installer (including shortcuts and uninstaller).
- Faster JPEG compression upgrading to mozjpeg 1.01 r43.
- Updated strip to 2.24.
- Upgraded to WinCHM 4.43.

6.00 - 2014/04/06
- Added PCX optimization support with PCXLite (no404error).
- Do not allow adding the same file more than once (mario lópez)
- Improved GIF compression ratio upgrading to gifsicle 1.82 (custom build).
- Compiled gifsicle with Visual C++ 2013.
- Improved JPEG compression replacing jpegtran with mozjpeg.
- Improved GZ, MNG, PNG, and ZIP compression ratio updating to AdvanceCOMP 1.19.
- Improved WEBP compression ratio updating to libwebp 0.4.0.
- libwebp changed to without WIC codes to reduce external dependencies.
- Upgraded ImageWorsener to 1.2.0.
- Upgraded to zRecompress 2.12.
- Updated to ImageMagick
- Fixed remove selected files out of bounds error.
- Windows 8.1 compatibility enhancements.
- Better performance updating to ASMLib 2.34.
- Upgraded to WinCHM 4.35.
- Upgraded distributions to 7-Zip 9.32.

5.90 - 2013/09/11
- Added ini option EXEDisablePETrim=false to disable PETrim when processing EXE files. Resulting executables will be larger, but it will prevent broking some SFX and installers as well as stripping digital signatures (Ascend4nt).
- Added ini option DoNotUseRecycleBin=false to prevent copying original files to your Recycle Bin. Be aware that enabling such option will prevent recovering original files (Runner112).
- Much improved WebP optimization by using cwebp and dwebp in libwebp (Runner112).
- Improved PDF compression upgrading to Ghostcript 9.10.
- Updated to ImageMagick

5.80 - 2013/07/30
- Added JNG to the JPEG tool chain.
- Implemented generic .aai .avs .dcx .pcc .pcx .fits .jp2 .jpc .hdr .hrz .mif .miff .mtv .otb .p7 .palm .pdb .pbm .pcd .pcds .pfm .pgm .picon .pic .pict .pnm .ppm .psb .psd .sun .vicar .viff .wbmp .xbm .xpm .xwd to the ImageMagic tool chain.
- Updated to ImageMagick
- Better performance updating to ASMLib 2.31.
- Included vcomp100.dll required by ImageMagick (Kolpotoru).
- Upgraded to C++ Builder XE4 Update 1.

5.70 - 2013/06/19
- Improved PNG compression ratio and speed updating to PngOptimizer 2.3.
- Upgraded Gifsicle to 1.71 (custom build).
- Added support for Gifsicle x64 too (custom build).
- Upgraded jpegoptim to 1.3.1 beta (custom build with libjpeg 9).
- Prevented zRecompress generating larger files.
- Closing windows is now more responsive.
- Some minor optimizations and code cleanup.

5.60 - 2013/05/01
- Added ICO PNG optimization support with ImageMagick.
- Added TIFF/FAX ZIP optimization support with ImageMagick.
- Added DIB format to the BMP chain.
- Updated ImageMagick to
- Upgraded to C++ Builder XE4.

5.50 - 2013/04/06
- Added BMP optimization support with ImageMagick (Chris Recon).
- Improved GZ, MNG, PNG, and ZIP compression ratio updating to AdvanceCOMP 1.17.
- Improved PNG compression updating pngwolf to pngwolf + zopfli (custom built
- Improved PNG compression speed removing advdef which makes no sense together with advpng.
- Improved JPEG compression updating to jpegtran 9.
- Improved GIF and JPEG compression updating to ImageMagick
- Prevent optimizing Inno Setup EXE files because they get broken with strip and PETrim,2438.0.html (Mario).
- Dynamic window title and application caption to show progress information (Jaff).
- Original size and Optimized size columns are now right aligned for better legibility (DotDotDot).
- Fixes some number formatting issues (Jaff).
- Some minor cosmetic and usability improvements.
- Other minor stability and performance improvements.

5.10 - 2013/02/25
- Improved PNG compression updating to PNGOUT 02/20/2013.
- Window properties were not properly src=loaded (Dr. Bhavesh).
- Make the minimized status of the ribbon permanent.
- Remove horizontal scrollbar in files grid (Dr. Bhavesh).
- Using a theme different that Windows, make drag&drop not work (Mario).
- Process Priority=Realtime and Checkforupdates=Never were not restored properly (Mario).
- Shorten manifest description (Dr. Bhavesh).
- Make ribbon load faster/refresh better (Dr. Bhavesh).

5.00 - 2013/02/17
- Improved GIF compression by adding ImageMagick.
- Improved JPEG compression by adding ImageMagick.
- Improved PDF compression upgrading to Ghostcript 9.07.
- EXE compression is now safer by removing /StripFixups:Y in PETrim.
- Upgraded ImageWorsener to 1.1.0.
- Upgraded Gifsicle to 1.70.
- New ribbon interface, just for those complaining about ugly interface. For the rest, the tradicional context menu is still available, and ribbon can be minimized to save screen space.
- Implemented remove selected files option.
- Total bytes saved are now shown when finishing the optimization.
- Solved an issue with Add files dialog in Windows XP and older, by switching from TFileOpenDialog to TOpenDialog.
- Fixed a Windows Vista incompatibility (lastMonkey).
- Fixed a bug that caused the program to confirm more than one time to exit when process where still active.
- Solved some issues optimizing OBJ/o and LIB/A files.
- Prevented empty log creation in x64 build when LogLevel=0 (n6333373).
- Prevented optimized files being larger that original ones in some rare scenarios.
- Some minor cosmetic and usability improvements.
- Other minor stability and performance improvements.
- Upgraded to C++ Builder XE3 Update 2.

4.00 - 2013/01/20
- Added OBJ (OBJ, O, LIB and A) optimization support with strip.
- Improved EXE and DLL compression by adding strip.
- Added context menu for Add files.
- Added context menu for Exit.
- Added context menu for About.
- Added ini option PDFProfile=ebook|screen|printer|prepress|default to set PDF recompression profile settings.
- Added ini option LogLevel=0 to log output.
- General performance improvements by using ASMLb 2.30.
- Win64 performance improvements.
- Win64 portability enhancements.
- Other minor cosmetic and usability improvements.
- Distribution size reduced by using 7-Zip archives/SFX.

3.00 - 2012/12/30
- Added native Win64 support (FileOptimizer64.exe).
- Added ini option KeepAttributes=false to keep file attributes and timestamp after optimization.
- Added ability to optimize read-only and system files.
- Included 64 bit plugins (Ghostcript, ImageWorsener, jpegoptim, MP3packer, PngOptimizer, zRecompress).
- Win64 portability improvements.
- Upgraded to C++ Builder XE3 Update 1.

2.30 - 2012/12/01
- Improved GIF compression ratio upgrading to gifsicle 1.68.
- Compiled gifsicle with Visual C++ 2012 Update 1 (Windows XP and later compatible).
- Upgraded to zRecompress 2.11 (Windows XP and later compatible).
- Compiled jpegoptim with Visual C++ 2012 Update 1 (Windows XP and later compatible).
- Improved BMP and WEBP compression ratio upgrading to ImageWorsener 1.0.0.
- Added BMP optimization support with ImageWorsener.
- Fixed a null pointer exception in Windows XP and 2003 introduced in 2.00.
- Fixed a bug that allowed to add files with no extension at all.
- Upgraded to C++ Builder XE3 Update 1.

2.20 - 2012/11/03
- Improved PNG and APNG compression ratio upgrading to OptiPNG Hg 20121021.
- Other minor stability and performance improvements.

2.10 - 2012/09/26
- Added Microsoft OLE Compound Files (DOC, PPT, XLS, CHM, Thumbs.db, StickyNotes.snt, ...) optimization support with Document Press (maadjordan).
- Improved Office and Office 2007+ compression ratio by adding some additional file extensions
- Allow dragging files even if FileOptimizer is elevated, and source process is not.
- Added theme support (Windows, Luna -Office 2007 like-, Metropolis UI Black -Windows 8 Metro like-).
- Added ini option Theme to set additional themes.
- Improved WINE compatibility and appearance.
- Slightly improved command line argument handling.
- Switched back to flat Deflate on ZIP distribution file because of Deflate64 incompatibilities with Windows XP built-in ZIP extractor.

2.00 - 2012/09/23
- Improved PNG and APNG compression ratio upgrading to OptiPNG Hg 20120916.
- Improved PNG and APNG compression ratio upgrading to PngOptimizer 2.2.
- Improved APNG compression ratio upgrading to APNG Optimizer 1.2.
- Added ini option Level=9 to set recompression ratio for GIF, GZ, MNG, PNG, APNG, ZIP.
- Automatically copy processed files to Recycle Bin so you can easily restore its original versions if required.
- Added ability to preview files in grid by double clicking them.
- Implemented Windows 7 and later taskbar progress.
- Allow files grid interaction even while optimizing is in progress.
- Improved grid status column formating to make sorting more natural.
- Improved visual appearance on rare color scheme combinations and themes.
- Enhanced statusbar progress display.
- Tweaked main window components in order to better fit in low screen resolutions.
- Constrained main window minimun width and height to avoid component misplacing.
- Enhanced and updated CHM help file.
- Upgraded to C++ Builder XE3.
- Main executable file is not packed anymore due to buggy antivirus raising false positives.
- Slightly reduced ZIP distribution file by using Deflate64.

1.70 - 2012/09/07
- Improved PNG, APNG, ZIP and GZ compression ratio including defluff (m^2).
- Improved PNG and APNG compression ratio upgrading to OptiPNG Hg 20120824.
- It is possible to add files in several batches, until Optimize option is choosen.
- Updated autoupdate functionality to new home at

1.65 - 2012/09/03
- Improved APNG compression ratio enabling PngOptimizer.
- Improved MP3 compression ratio upgrading to MP3packer 2.04.
- Disabled grid selection to avoid confusion about Optimize and Delete operating against all items, or only selected ones.
- Clarified that FileOptimizer will overwrite existing files, and advise to create a backup.
- Ask user consent before enabling automatic check for updates (Skye).
- Better Win64 compatibility by dynamically loading Wow64DisableWow64FsRedirection.
- Better file type extension detection.
- Improved Windows XP and older appearance by tweaking grid odd color.
- Added ini option ProcessPriority=IDLE_PRIORITY_CLASS to set default process priority
- Added ini option CheckForUpdates to enable/disable automatic check for supdates functionality.
- Added ini option GZCopyMetadata=false to enable copying GZ metadata.
- Added ini option MP3CopyMetadata=false to enable copying MP3 metadata.
- Added ini option ZIPCopyMetadata=false to enable copying ZIP metadata.
- Programmatically modify process priority (jdeleca).
- Detect number of cores in preparation for a future multithreaded version (jdeleca).

1.60 - 2012/08/28
- Added OGG optimization support with rehuff (jethro).
- Implemented automatic update check.
- Added ini option JPEGCopyMetadata=false to enable copying JPEG metadata (Stephan Busch).
- Added ini option JPEGUseArithmeticEncoding=false to enable JPEG arithmetic encoding instead of Huffman.
- Added ini option PNGCopyMetadata=false to enable copying PNG metadata.
- Dynamically load Vista and later COMCTL32.DLL, so FileOptimizer works again under Windows XP (Robert Bass / Barry).

1.51 - 2012/08/26
- Properly clean temporary file, so in extreme scenarios plugin invocation works as espected (Stephan Busch).

1.50 - 2012/08/25
- Added BMP optimization support with ImageWorsener.
- Added OGV optimization support with rehuff_theora (Stephan Busch).
- Added WEBP optimization support with ImageWorsener.
- Improved JPEG compression ratio instructing jpegtran to generate progressive images (Stephan Busch).
- Improved PNG compression by adding pngwolf (m^2).
- Improved PNG compression by adding pngrewrite (Stephan Busch).
- Improved PNG compression by adding advdef (Stephan Busch).
- Improved PNG compression by adding ImageWorsener.
- Upgraded to AdvanceCOMP 1.16 Beta (maadjordan).
- Removed advzip and DeflOpt from TIFF tool chain, since they have no effect, even on deflated TIFF (Stephan Busch).

1.40 - 2012/08/20
- Added MP3 recompression support.
- Improved ZIP compression ration upgrading to zRecompress 2.10.
- Improved APNG compression ratio by using PngOut and OptiPNG with them too.
- Improved PNG compression ratio including PngOptimizer.
- Improved PNG compression ratio by using tweaking OptiPNG parameters.
- Improved JPEG compression ratio and speed updating to jpegoptim 1.2.4 (custom built with libjpeg 8d).
- Assured that APNG files with PNG extension are properly detected regardless of the extension (maadjordan).
- Removed 3dm and sis from the ZIP chain since they are in fact deflate (maadjordan).
- Files grid column widths are now stored in the INI file in order to be permanent across executions.
- Some internal code simplification and refactorization.

1.30 - 2012/08/19
- Improved SWF and GZ compression ratio by adding my brand new zRecompress.
- Extended ZIP support to .3dm .odt .sis.
- Gathered PNGOut redistribution permission from Ardfry Imaging, LLC.

1.20 - 2012/08/16
- Added DLL optimization support.
- Improved PNG compression ratio by tweaking PNGOut and OptiPNG parameters.
- Improved MNG compression ratio by tweaking advmng parameters.
- Improved PDF compression ratio by tweaking Ghostcript parameters.
- Improved EXE compression ratio and speed by replacing GNU strip and StripReloc with PETrim.
- Improved GIF compression ratio and speed updating to Gifsicle 1.6.7 (custom built).
- Improved ZIP and GZ compression ratio and speed updating to ZLib 1.2.7.
- Slightly improved compression speed by launching plugins in quiet mode when available.
- Disabled by default JPEG arithmetic encoding, and enabled huffman optimization again, due to incompatibilities with some programs and popular request. This causes file size to reduce less.
- Bundled with CHM help file.
- Grid contents can be sorted ascending and descending by clicking on column headers.
- Better default grid columns width and number format.
- Colored rows in files grid to make it easy to read.
- Status bar with global progress and other informations.
- Better Win64 compatibility.
- Prevent dragging files to the grid when there are already files.
- Gracefully exit even if there are plugin processes running.
- Make sure that resulting APNG, JPEG, PDF, and TIFF files are always smaller than original ones before overwritting them.

1.10 - 2012/08/13
- Added EXE optimization support.
- Added TIFF recompression support.
- Speedup ZIP and GZ compression by splitting it in separated paths.
- Speedup PNG compression by removing Pngcrush.
- Improved ZIP and GZ compression ratio and speed updating to ZLib 1.2.5.
- Improved PNG compression ratio by tweaking PNGOut parameters.
- Improved JPEG compression ratio by tweaking jpegtran parameters.
- Added support for Ghostcript x64 too.
- Extended ZIP support to .epub and .cbz
- Ability to automate file optimization by invoking FileOptimizer with one or more command line parameters, supporting folders to recurse or files.
- Stability and perfomance improvements on grid handling code.
- During compression FileOptimizer is now more responsiveness.

1.00 - 2012/08/11
- Added PDF recompression support.
- Added SWF recompression support.
- Added APNG recompression support.
- Improved JPEG compression ratio including jpegtran.
- Improved PNG/MNG/APNG compression including pngcrush..
- Extended PNG support to .ico.
- Extended ZIP support to .air .apk .appx .docm .docx .dwfx .ipa .jar .mpp .oxps .pptm .pptx .pub .vsd .xlsm .xlsx .xps .zip.

0.90 - 2012/08/09
- Initial feature complete private beta.

- Official FileOptimizer's website:

- Official author's website: