Compare software

TinyPNG vs ImageOptim: catalog facts
TinyPNG	ImageOptim
Freemium The online compressor is free; the developer API and image CDN have paid plans.	Free Free and open source under the GPL.
Web	macOS
Nothing to install, works in the browser Handles AVIF, JXL, WebP, PNG and JPEG	Runs several optimisers and keeps whichever result is smallest Removes GPS and EXIF data as part of optimising
Lossy compression changes image data Requires an internet connection and uploading images	macOS only Optimisation is in place, so originals should be kept separately
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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