Compare software

Rimage vs OptiPNG: catalog facts
Rimage	OptiPNG
Free Free and open source, dual-licensed under Apache 2.0 and MIT.	Free Free and open source under the zlib licence.
Windows, Command line	Windows, Command line
Modern codecs for small output files Scriptable from the command line	Lossless recompression of PNG files Converts BMP, GIF, PNM and TIFF to optimized PNG
No graphical interface No tagged releases on GitHub	Command line only, no graphical interface Lossless only, so savings are smaller than lossy tools
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0 OR MIT	License: Zlib
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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