JPG to PNG Converter
FileFlip converts JPG to PNG entirely inside your browser, using ImageMagick compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert a JPG file to PNG?#
- Drop your JPG file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to PNG and the conversion starts on its own. FileFlip downloads 14.1 MB of WebAssembly the first time and nothing after that, then runs ImageMagick on your own machine.
- Save the PNG file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting JPG to PNG lose quality?#
PNG is a lossless format, so nothing further is lost here, but nothing is recovered either. Whatever the JPG encoder already threw away is gone, and the PNG file will usually be several times larger for exactly the same content.
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 JPG to PNG actually does to the file#
Converting JPG to PNG runs on ImageMagick, downloads 14.1 MB of WebAssembly the first time and nothing after that, writes a lossless file that cannot recover what the source already discarded, keeps EXIF metadata and ICC colour profile.
| Engine | ImageMagick |
|---|---|
| Conversion path | One step: JPG → PNG |
| Downloaded to your browser | 14.1 MB, once, then cached by your browser |
| Quality | Lossless output, but nothing is recovered |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| EXIF metadata | Kept | Carried through into the converted file. |
| ICC colour profile | Kept | Carried through into the converted file. |
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.
What is a PNG file?#
A PNG file stores a raster image using lossless DEFLATE compression, which is why screenshots, logos, and graphics with flat colour or sharp edges use it instead of JPEG.
Use PNG for screenshots, logos, icons, and any graphic with flat colour or transparency, where exact pixel reproduction matters more than file size.
Convert PNG to JPEG or WebP when the image is a photograph and file size matters more than pixel-perfect reproduction, since a photographic PNG is typically several times larger than an equally sharp lossy file.
JPG to PNG questions people ask#
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 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.