A lossy-compressed raster image format, ubiquitous for photos.
| 0x00000000 | FFD8FF | ··· | Start-Of-Image marker |
JPEG uses discrete-cosine-transform compression tuned for photographic images, trading a small, mostly invisible amount of quality for a large drop in file size. Files begin with the Start-Of-Image marker FF D8 and end with FF D9.
Have a file that might be JPEG? Identify it with the File Type Identifier — it reads the magic number locally, nothing is uploaded. Or browse all formats.