Convert PNG to JPEG
Drop a PNG file below and get a JPEG 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
Ctrl/⌘ VPaste a screenshot or copied image
Accepts PNG
Lower means a smaller file. 75 is a good default for photos.
100% in your browser Files are never uploaded.
Why convert PNG to JPEG?
For the same picture, JPEG usually lands well under the size of the PNG original. That matters when you are trimming page weight or squeezing under an upload limit.
PNG can carry transparency; JPEG cannot. Transparent pixels are composited onto white during conversion, so a logo with a see-through background will come out sitting on a white rectangle.
Screenshots and design exports come out of the tool as PNG, and PNG keeps every pixel exactly — which is why a single screenshot can run to several megabytes. Mail attachment limits, upload caps and page weight budgets are all downstream of that. Converting to JPEG is the bluntest way to make the file small, and for photographic content it costs you almost nothing visible.
Before you convert
Transparent areas become solid, and black is the usual accident
A JPEG cannot hold a transparent pixel — the format has no channel for it. Every see-through area has to be filled with something, and a tool that does not think about it fills with black, which is why logos so often come out on a dark rectangle. This converter fills with white instead, which is the safer default for the usual cases. It is still worth knowing: if your artwork is pale line work meant to sit on a dark page, white will swallow it. Keep it as PNG or WebP in that case.
Text and sharp edges are where JPEG looks worst
JPEG was designed for photographs — smooth gradients, no hard boundaries. Give it a screenshot full of crisp text on flat colour and it produces faint halos along every edge, the artefact usually called ringing. On a photo you will never notice it; on a screenshot of a document it is the first thing you see. If the image is mostly text or UI, PNG and WebP will both look better and often come out smaller too.
There is no way back
Lossy compression throws information away permanently. Converting the JPEG back to PNG later will not recover it — you will just get a bigger file containing the same degraded pixels. Keep the PNG original if the image still has editing ahead of it.
What carries over
- Pixel dimensions
- Colour profile
- Visible content of the image
What does not
- The alpha channel — transparency is filled in
- Losslessness — further edits compound the damage
- Crisp edges on text and line art
PNG vs JPEG at a glance
| Property | PNG | JPEG |
|---|---|---|
| Compression | Lossless | Lossy |
| Transparency | Yes | No |
| Typical file size | 300-500% of an equivalent JPEG | 100% of an equivalent JPEG |
| Compatibility | Opens everywhere, including decades-old software | Opens everywhere, including decades-old software |
| Usually comes from | Screenshots, logos and graphics | Digital cameras and photo sharing |
Frequently asked questions
Are my PNG files uploaded anywhere?
No. The decoder and encoder are WebAssembly modules that run inside this page. The network tab may show a codec downloading the first time you use a format, but no request contains your file. On supported browsers, a codec that has already been used is cached so the same conversion can work offline.
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 JPEG lose quality?
JPEG is a lossy format, so some data is discarded. At the default quality setting the difference is not visible at normal viewing sizes. If you need an exact copy of the pixels, choose PNG instead.
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.
My PNG is a screenshot — anything to watch for?
Screenshots are mostly flat colour and sharp text, which is what lossy formats handle worst. If the target is lossy, text edges can pick up faint halos. Use a high quality setting, or stay with PNG if the text has to remain crisp.
What quality setting should I use?
For photographs, 75 to 85 is the range where most people cannot tell the result from the original at normal viewing size. Below about 60 you start seeing blocky artefacts around sharp edges. Above 90 the file grows quickly in exchange for very little visible gain.