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Curtailpngquant
Free

Free and open source under the GPL-3.0-or-later.

 Free

Free and open source; the CLI is under GPL-3.0-or-later with some parts under HPND and…

Linux Windows, macOS, Linux, Command line
  • Handles PNG, JPEG, WebP and SVG
  • Uses proven tools like oxipng and pngquant
  • Large file size reductions with preserved transparency
  • Adaptive dithering with less noise
  • Linux only
  • Compression only, no other editing
  • Command line only; graphical use needs a separate front end
  • Lossy, so not suited to images that must stay pixel-exact
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0-or-later License: GPL-3.0-or-later
No account needed No account needed
Works offline Works offline

Checked October 1, 2026

Checked October 1, 2026

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