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FastStone Photo ResizerImageMagick
Free

Free for personal and educational use.

 Free

Free and open source under the ImageMagick licence, an Apache 2.0 style licence.

Windows Windows, macOS, Linux, Command line
  • Batch conversion and renaming in one tool
  • Reads HEIC and WebP
  • Over 200 formats, with conversion, resizing, compositing and effects from one command
  • APIs for most programming languages as well as the command line
  • Windows only
  • Free licence covers personal and educational use only
  • The project advises creating and validating a security policy before use, especially with untrusted files
  • Its format handling has been a repeated source of security vulnerabilities
Downloadable app Downloadable app
Closed source Open source
License not stated License: ImageMagick
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.