LZ4

Writable

Identify it

Extensions	`.lz4`
MIME types	`application/x-lz4`
Signatures	`04224d18` at byte 0 (File Formats Wiki) `03214c18` at byte 0 (File Formats Wiki) `02214c18` at byte 0 (File Formats Wiki)
Wikidata	`Q15624241Q28770292`

Not sure your file is this? Identify it from its first bytes, in your browser.

libarchiveOpen sourcereads and writes · 2-clause BSD License
LZ4Open sourcereads and writes · 2-clause BSD License / GNU General Public License, version 2.0
ouchOpen sourcereads and writes · MIT License

No conversion recorded. One of the tools above may export it; search for a chain.

From Just Solve the File Format Problem (File Formats Wiki), Wikidata. Updated 2026-10-24.