About JFIF to JPG Free

JFIF to JPG Free is a small set of free image-format conversion tools - starting with JFIF to JPG and JPG to JFIF - built to solve one specific, common annoyance: images that get saved with the wrong file extension for no obvious reason.

How it works

Every conversion runs entirely in your browser, using the Canvas and File APIs built into modern web browsers. When you drop or select a file, it's decoded and processed locally on your device - it is never uploaded to a server, because there is no server involved in the conversion itself. That's not a privacy promise layered on top of the product; it's just how the tool is built.

Two modes are available. Instant Rename reads a file's real bytes, confirms they're genuinely JPEG data (JFIF and JPEG are the same underlying format), and relabels the file with a new extension - zero re-encoding, zero quality loss. Full Convert genuinely re-encodes the image - using the same WebAssembly compression codecs behind Google's own Squoosh app for JPG and WEBP output, running entirely on your device - for when you actually want to change format, quality, or dimensions.

Who runs this

JFIF to JPG Free is independently built and maintained. It's a small, focused project rather than a large company - see Privacy Policy and Terms of Use for the specifics of how the site operates.

Contact

Questions or feedback: [contact email TBD]