What is a .JPG file?
JPEG is the most widely used photo format, using lossy compression to keep files small. It is the default for most cameras, phones and the web.
- Did you know
- The JPEG standard was published in 1992 and is still the default photo format on virtually every camera and phone.
- The three-letter “.jpg” spelling persists because early MS-DOS and Windows file systems allowed only three-character extensions.
- JPEG was also issued as ITU-T Recommendation T.81, the telecoms world’s version of the same standard.
- On the web a .JPG file is served with the MIME type
image/jpeg. - Analyser spots a .JPG file by its signature bytes
FF D8 FF.
- What Analyser shows you
- View EXIF, GPS, camera settings, histograms, dominant colours, OCR text, and AI-generation markers in JPG, PNG, HEIC, WebP, GIF, BMP, TIFF, AVIF and JPEG XL images. Detects computational-photo wrappers (Apple Live Photo, Google and Samsung Motion Photo, Ultra HDR gain maps), opens THM movie-thumbnail files, and extracts every embedded image from multi-image files - all sizes in an ICO, both halves of an MPO stereo pair, and every page of a multi-page TIFF.
- Open a .JPG file
- Drag a .JPG file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.