PNG to JPG
Flatten a PNG into a JPG. Transparency has nowhere to go and arrives as a solid block, and hard edges are the exact thing JPEG rings around.
Runs on your device. The file is never uploaded.
PNG to JPG hands JPEG exactly the picture JPEG handles worst. A screenshot or a logo is flat colour meeting a hard edge, and the smoothing leaves a faint halo along every one of those edges. The see-through parts arrive as a solid block, since a JPG has nowhere to put them.
Questions
Does PNG to JPG upload my files?
No. PNG to JPG runs inside this browser tab, in a Web Worker on your own machine, and no part of your file is sent anywhere. There is no upload step to skip — the tool cannot reach a server even if it wanted to, and the counter on the homepage shows the number of outbound requests the page has made: zero.
How many files can I use at once?
Drop as many as you like. Each file is handled separately and comes back as its own result, so twenty files in means twenty results out.
What can I change about the result?
One setting: quality (Quality 1-100). Defaults are filled in, so it runs without changing anything.
Is PNG to JPG free, and do I need an account?
It is free and there is no account, no sign-in and no quota. Nothing is metered because nothing runs on a server — the only limit is your own device's memory, which is what decides how large a file it can handle.
Does it work offline?
Yes. The whole site is stored in your browser after the first visit, so PNG to JPG keeps working with the network off. Tools that use a machine-learning model download that model once, on first use, and run offline afterwards.
Can I use PNG to JPG outside the browser?
Yes. Every tool here is the same code on three surfaces: this page, a CLI command, and an MCP tool an AI agent can call. `png-to-jpg` is the name it goes by on all three.