JPG Converter
FileFlip converts JPG files into 58 other formats entirely inside your browser, using ImageMagick, MuPDF and Pandoc compiled to WebAssembly. The JPG file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. There is no file-size limit and no account to create.
How do I convert a JPG file?#
- Drop your JPG file onto the converter at the top of this page, or click it to pick one from your computer.
- Choose the format you want out of it. FileFlip downloads the engine that conversion needs, once, and your browser caches it.
- Conversion starts the moment you pick the format, and the result is yours to download. The work happens in this tab, so nothing is uploaded and nothing is queued.
Is it safe to convert JPG files online?#
Yes, because nothing is uploaded. FileFlip converts JPG files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What happens to a JPG file#
FileFlip converts JPG into 58 formats with ImageMagick, MuPDF and Pandoc, all of it inside the browser tab. Each conversion below names the engine it uses, what it downloads, and exactly what that conversion keeps or drops.
| Category | Image Files |
|---|---|
| File extension | .jpg |
| FileFlip support | Read and written |
| Conversions available | 58 |
| Engines | ImageMagick, MuPDF and Pandoc |
| Downloaded to your browser | 14.1 MB on the first conversion, then cached |
What is a JPG file?#
A JPG file holds a photograph or other continuous-tone image compressed with the JPEG algorithm, the lossy codec that has been the default for digital photos and web images since 1992.
Use JPG for photographs and any image where small file size matters more than pixel-perfect fidelity or a transparent background.
Convert away from JPG when the image needs transparency, when it's flat-color artwork or text that PNG compresses better, or when the file has been through enough edit-and-resave cycles that the compression artifacts are visible.
The JPG file format reference covers the specification, the programs that open one, and what each conversion keeps or drops.
JPG questions people ask#
What does JPG stand for?
JPG is a shortened spelling of JPEG, which stands for Joint Photographic Experts Group, the committee that designed the compression standard in 1992. The extension itself carries no separate meaning beyond that origin.
Is JPG lossy or lossless?
JPG is a lossy format. Its compression discards image detail that the algorithm judges least noticeable to the eye, which is what lets it shrink a photo to a fraction of its uncompressed size, but the discarded detail can't be recovered later.
Why does my JPG keep losing quality every time I save it?
Each time a JPG is opened, edited, and saved again, the software recompresses the whole image, and JPEG's lossy compression throws away a bit more information on every pass. Editing a copy in a lossless format like PNG or TIFF and only exporting the final result to JPG avoids this generational loss.
Can a JPG have a transparent background?
No. JPG stores only red, green, and blue channels per pixel and has no alpha channel for transparency. A JPG with an apparently transparent area is actually filled with a solid color, usually white; PNG or WebP are used when transparency is needed.
What's the maximum resolution a JPG can hold?
The JPEG standard allows dimensions up to 65,535 by 65,535 pixels per component. In practice, individual editors and image libraries often cap this lower, but the format itself is not the limiting factor for any camera or scanner in common use.