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- pngcrush
On the recordRead 8 Oct 202617 facts
pngcrush
Plans and prices
pngcrush
Free
Open source; may be used, modified, and redistributed without a fee
Read 8 Oct 2026 · pmt.sourceforge.io
On the record
- API access
- Nopmt.sourceforge.io · read 20 Sep 2026
- Batch processing
- Yespmt.sourceforge.io · read 20 Sep 2026
- Build caveat
- The maker warns that compiling with an unpatched libpng earlier than 1.2.7 or 1.0.17 leaves the program vulnerable to overflow conditions fixed in August 2004.pmt.sourceforge.io · read 8 Oct 2026
- Chunk handling
- It can remove unwanted ancillary chunks or add chunks including gAMA, tRNS, iCCP, and textual chunks.pmt.sourceforge.io · read 8 Oct 2026
- Compression modes
- losslesspmt.sourceforge.io · read 20 Sep 2026
- GUI options
- The maker points to ImageOptim for Mac and Trimage for Linux, Windows, and Mac as free graphical applications that embed pngcrush with other image compressors or optimizers.pmt.sourceforge.io · read 8 Oct 2026
- Interface
- pngcrush is a command-line application that runs from an MSDOS, UNIX, or Linux command line.pmt.sourceforge.io · read 8 Oct 2026
- Latest version listed
- The SourceForge files page lists pngcrush-1.8.11.tar.xz as the latest version.sourceforge.net · read 8 Oct 2026
- License
- The maker says pngcrush is open source and may be used, modified, and redistributed without paying a fee; its license is equivalent but not identical to the libpng license.pmt.sourceforge.io · read 8 Oct 2026
- Metadata controls
- Yespmt.sourceforge.io · read 20 Sep 2026
- Purpose
- pngcrush optimizes PNG files by trying compression levels and PNG filter methods to reduce the IDAT datastream size.pmt.sourceforge.io · read 8 Oct 2026
- Image resizing
- Nopmt.sourceforge.io · read 20 Sep 2026
- Security note
- The maker says the build linked statically with the supplied zlib is believed immune to the zlib-1.1.3 double-free bug because it detects and rejects double-free attempts.pmt.sourceforge.io · read 8 Oct 2026
- Source and dependencies
- The source is available from SourceForge and the pmt git repository, and the distribution includes libpng and zlib.pmt.sourceforge.io · read 8 Oct 2026
- Supported formats
- PNGpmt.sourceforge.io · read 20 Sep 2026
- Windows binaries
- The maker links to precompiled Windows binaries that run in an MSDOS window.pmt.sourceforge.io · read 8 Oct 2026
