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Modern7z vs 7-Zip-zstd: catalog facts
Modern7z	7-Zip-zstd
Free Freeware under TC4Shell's terms of use.	Free The software is free under its open-source licence. Hosting, hardware and external…
Windows	Windows, Linux
Adds Zstandard, Brotli, LZ4 and other modern methods to 7-Zip Opens Zip archives compressed with ZSTD or Brotli	It keeps the familiar 7-Zip interface and Explorer menu while adding modern codecs, and it can be installed…
Needs 7-Zip and a manual install into its Codecs folder The new methods compress single files, so multiple files need a TAR container	Archives that use the added codecs will not open in stock 7-Zip, so they are not safe to…
Downloadable app	Downloadable app
Closed source	Open source
License: Freeware	License: BSD-3-Clause
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.