PNG to JPG
Convert PNG to JPG in your browser with a matte colour you choose, so transparency never turns black. Batch friendly, nothing uploaded.
Related tools
All Image tools →This tool runs entirely in your browser. Nothing you enter is sent to our servers, so there is nothing for us to store or see.
About the PNG to JPG
Convert PNG files to JPG, usually to make them dramatically smaller. A photograph saved as PNG is often five to ten times the size of the same picture as a JPEG, with no visible difference at a sensible quality setting.
Transparency is the part that goes wrong everywhere else. JPEG has no alpha channel, so every transparent pixel has to become some opaque colour — and the default in a browser canvas is black. That is why a converted logo so often comes back with a black halo, or a black rectangle where the background used to be. Here the matte colour is a control with a white default, the tool detects whether your file actually has transparency, and it tells you which colour it used.
The quality slider trades size against artefacts. Around 85 to 90 per cent is visually indistinguishable from the original for almost any photograph. Below 60 the artefacts become obvious, particularly around text and flat colour — which is exactly the content PNG is good at and JPEG is not.
Everything runs on your device. Nothing is uploaded, which matters when the PNG is a screenshot of something you would rather not hand to a website.
How to use the PNG to JPG
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Add your PNG files
Drop them onto the box or click to choose. Several at once is fine — they are processed one at a time so a large batch cannot exhaust your device.
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Choose the background colour
This is what transparent areas become. White suits most things; pick the colour of the page the image will sit on for a logo.
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Set the quality
Start at 90. Drop it if the files need to be smaller and check the result — the point where artefacts appear depends on the picture.
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Download
Each finished file reports how much smaller it got and whether transparency was filled. Save them individually or all at once.
Frequently asked questions
Why did the transparent parts of my PNG turn black?
That happens in tools that convert without choosing a matte colour: JPEG cannot store transparency, and an unfilled canvas is black. This tool fills transparent areas with a colour you choose, defaulting to white, and tells you when it has done so. Pick the colour of the background the image will sit on and the join will be invisible.
How much smaller will my file get?
For a photograph saved as PNG, usually 80 to 95 per cent smaller. For a screenshot, a logo or a diagram, often very little — sometimes larger — because PNG compresses flat colour and sharp edges better than JPEG does. If your PNG is already small, converting it will not help.
What quality setting should I use?
85 to 90 for anything you care about. Above about 92 the file grows quickly for a difference almost nobody can see. Below 60, JPEG artefacts become obvious around text and flat colour. If the image contains screenshots or diagrams, consider whether JPEG is the right format at all.
Does converting lose quality?
Yes — JPEG is lossy by design, and every save discards some detail. At 90 per cent that loss is invisible for a photograph. What matters is not to convert repeatedly: each round of JPEG encoding compounds the last, and an image saved and re-saved a dozen times shows it clearly.
Are my images uploaded anywhere?
No. Decoding, matting and encoding all happen in your browser. Nothing is transmitted or stored, and the tool keeps working if you disconnect from the internet after the page loads.