JPG to PNG
Get a lossless copy to edit — never uploaded.
How it works
Three steps, and nothing leaves your device.
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1
Drop the JPG in
It is decoded in the page; nothing is sent anywhere.
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2
It is written out as PNG
Lossless: every pixel of the decoded image is stored exactly.
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3
Download the PNG
Larger than the JPG, and it will not degrade further.
What a PNG can and cannot recover
- The file will get bigger, and that is expected. PNG stores every pixel exactly instead of approximating them, so a photograph converted from JPG typically grows several times over. You are trading size for the guarantee that nothing degrades from here.
- It cannot undo the JPG compression. This is the single most misunderstood point. Whatever detail the JPG already discarded is gone, and the PNG faithfully preserves the damaged version. Converting does not restore sharpness, remove blocky artefacts, or recover a blurred edge.
- What it does buy you is no further loss. Every time a JPG is opened, edited and saved again it is re-compressed and loses a little more. PNG does not: you can edit and save it a hundred times and the pixels stay identical. That is the reason to convert before starting work on an image.
- PNG supports transparency, but a JPG has none to give. The result is fully opaque. You can erase parts afterwards in an editor and the PNG will store that transparency correctly — the format is ready for it even though the source was not.
Frequently asked questions
Will this improve the image quality?
No. Compression damage already in the JPG is permanent, and the PNG preserves it exactly. What it prevents is further loss from here on.
Why is the PNG so much bigger?
PNG is lossless — it stores every pixel rather than approximating. On a photograph that is several times the size of a JPG.
When is this worth doing?
Before editing. JPG loses a little more every time it is saved; PNG does not lose anything.
Is my image uploaded?
No. Everything happens in your browser.