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Pngyu vs Squoosh: catalog facts
Pngyu	Squoosh
Free Free and distributed under the BSD license.	Free Free to use.
Windows, macOS	Web
Gives pngquant a graphical interface Pre-built binaries for Windows and macOS	Side-by-side comparison makes it easy to judge quality versus file size trade-offs Runs entirely in the browser with no upload needed
Handles PNG files only No pre-built Linux binary	Focused narrowly on compression and format conversion, not general image editing Best suited to single images rather than batch processing
Downloadable app	Web application
Open source	Closed source
License: BSD-3-Clause	License not stated
No account needed	Not stated if an account is needed
Works offline	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.