Jeff's Image Format
Unknownimage
Jeff's Image Format (JIF) is a raster image file format that was designed to be a patent-free alternative to GIF. It is nearly identical to GIF, except that it uses zlib compression instead of LZW.
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| Extensions | .jif |
|---|---|
| MIME types | application/octet-stream |
| Signatures | 4a4946393961 at byte 0 (Jeffs Image Format) |
| PRONOM | fmt/994 |
| Wikidata | Q28206407 |
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From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.