Convert JPG to PNG
Convert JPG images to PNG directly in your browser. Your files are never uploaded.
What to know
Going from lossy JPG to lossless PNG cannot recover detail that was already thrown away, and the file usually gets larger rather than smaller. It is worth doing when you need transparency or intend to edit further, not to improve quality.
JPG throws away detail the eye is least likely to notice, which is why photos compress so well. It has no transparency channel at all, and every re-save loses a little more quality.
PNG compresses losslessly and keeps full alpha transparency, which makes it the right choice for screenshots, logos and line art — and a poor one for photographs, where it produces far larger files than JPG.
Questions
Are my JPG files uploaded anywhere?
No. The conversion runs inside your browser using the Canvas API. The file is read into memory on your own machine and never sent over the network, which you can confirm by opening your browser's developer tools and watching the network tab stay empty.
Does converting JPG to PNG reduce quality?
PNG is lossless, so nothing is degraded during the conversion itself. Any quality already lost in the original JPG cannot be restored, however.
Is there a file size limit?
There is no limit imposed by the tool, because there is no server to upload to. The practical ceiling is your device's available memory — very large images may be slow on an older phone.