Convert JPEG to PNG
Drop a JPEG file below and get a PNG back. The conversion happens on your own machine, so nothing is uploaded and there is no size or quantity limit beyond what your browser can hold in memory.
Drop images here
Accepts JPEG
Lower means a smaller file. 75 is a good default for photos.
100% in your browser Files are never uploaded.
Why convert JPEG to PNG?
Expect the PNG file to come out larger than the JPEG you started with. That is the price of the broader compatibility and simpler decoding PNG gives you.
PNG supports an alpha channel, so you can cut out a background after converting. The conversion itself will not invent transparency that the JPEG file never had.
PNG is lossless, so the conversion adds no new compression artefacts. Whatever detail survives in the JPEG file is carried across exactly.
PNG is the format most image editors and design tools expect, which makes it the practical choice when the file is headed for further editing rather than straight onto a web page.
JPEG vs PNG at a glance
| Property | JPEG | PNG |
|---|---|---|
| Compression | Lossy | Lossless |
| Transparency | No | Yes |
| Typical file size | 100% of an equivalent JPEG | 300-500% of an equivalent JPEG |
| Compatibility | Opens everywhere, including decades-old software | Opens everywhere, including decades-old software |
| Usually comes from | Digital cameras and photo sharing | Screenshots, logos and graphics |
Frequently asked questions
Are my JPEG files uploaded anywhere?
No. The decoder and encoder are WebAssembly modules that run inside this page. You can verify it by opening your browser’s network tab — converting a file produces no outbound requests. You could even disconnect from the internet after the page loads and it would still work.
Is there a file size or quantity limit?
There is no limit imposed by us. The practical ceiling is your device’s memory, since the image has to be held uncompressed while converting. On a typical laptop, images up to around 100 megapixels convert without trouble.
Will converting to PNG lose quality?
The original JPEG is already lossy, so some detail was discarded when it was first created. Converting to PNG preserves whatever is in the JPEG file exactly, but it cannot recover what was lost earlier.
Does it work on a phone?
Yes. The same WebAssembly modules run on mobile browsers. Conversion is slower than on a desktop because phone CPUs are weaker, and very large images are more likely to hit memory limits.
Will converting from JPEG lose more quality?
A little, if the target is also lossy. The JPEG you start with has already discarded data, and a second lossy encode discards a bit more. At quality 80 or above that second loss is hard to spot, but it is exactly why you should keep the original rather than converting the same file back and forth.
Why is the PNG bigger than the original?
PNG is lossless, so it stores every pixel exactly instead of approximating them. For photographs that usually means a file several times larger than a lossy original. PNG earns its keep with screenshots, logos, line art and anything needing transparency — not with photos.