JPEG File Interchange Format 1.02
Writableimage · also known as JFIF (1.02)
The JPEG File Interchange Format (JFIF) is a file format for storing JPEG-compressed raster images. It was developed by the Independent JPEG Group and C-Cube Microsystems, in the absence of any such format being defined in the JPEG standard, and rapidly became a de facto standard. A JFIF file comprises a JPEG data stream together with a JFIF marker. It begins with a Start of Image (SOI) marker, immediately followed by a JFIF Application (APP0) marker and one or more optional application extension markers. This is followed by the JPEG image data, which is terminated by an End of Image (EOI) marker. JFIF supports up to 24-bit colour and uses lossy compression (based on the Discrete Cosine Transform algorithm). Other types of compression are available through JPEG extensions, including progressive image buildup, arithmetic encoding, variable quantization, selective refinement, image tiling, and lossless compression, but these may not be supported by all JFIF readers and writers.
Identify it
| Extensions | .jpg.jpeg.jfif.jfi.jpe.jif |
|---|---|
| MIME types | image/jpeg |
| Signatures | ffd8ffe0 at byte 0 (JFIF 1.02) |
| PRONOM | fmt/42fmt/43fmt/44 |
| Wikidata | Q26329975Q1676669 |
| Library of Congress | fdd000018fdd000619 |
| Apple UTI | public.jpeg |
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Open it
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And 89 more in the JSON record.
Convert it
| To | With | Fidelity | Command and losses |
|---|---|---|---|
| Portable Network Graphics | ImageMagick | Lossless | convert in.jpe out.pngPixels kept; some metadata, colour profiles or layers may be dropped. |
| Tagged Image File Format | ImageMagick | Lossless | convert in.jpe out.tifPixels kept; some metadata, colour profiles or layers may be dropped. |
| GIF 89a | ImageMagick | Lossy | convert in.jpe out.gifReduced to 256 colours. |
| WebP | ImageMagick | Lossy | convert in.jpe out.webpLossy compression. |
Documentation
Versions and variants (2)
- JPEG File Interchange Format 1.00Partly documented
- JPEG File Interchange Format 1.01Partly documented
Sources
From Converters (FFmpeg, ImageMagick, Pandoc, LibreOffice), Just Solve the File Format Problem (File Formats Wiki), Kaitai Struct format gallery, PRONOM, Wikidata. Updated 2026-10-24.