How this JPG to PNG converter works
Your browser opens the JPEG, redraws it pixel by pixel, and saves the result as a PNG. The file stays on your device the whole time. Nothing uploads, so a 20 MB photo converts as fast as your machine can decode it.
One honest limitation: converting to PNG stops future quality loss, but it cannot restore detail the JPEG already threw away. The PNG looks exactly like the JPEG you fed in.
When should you convert JPG to PNG?
You want PNG when the image is about to be edited, layered, or displayed somewhere that treats it as graphics rather than a photo:
- You plan to edit the image over multiple rounds. Each JPEG re-save degrades it further. Switch to PNG once and edits stay clean from that point on.
- An upload form, printing service, or app insists on .png files.
Expect the PNG to be larger than the JPEG, often several times larger. PNG stores every pixel exactly, and photographs contain a lot of pixel variation to store.
Quick comparison
| JPG | PNG | |
|---|---|---|
| Further quality loss on re-save | Yes, compounds | None |
| Transparency support | No | Yes |
| File size for photos | Small | Large |
| Good base for editing | Poor | Good |
Frequently asked questions
Will the PNG look better than my JPEG?
It will look the same. PNG preserves exactly what the JPEG contained, including any compression artifacts already baked in. The gain is that nothing degrades from here on.
Why is my PNG so much bigger than the JPEG?
PNG records every pixel without loss. A photograph that JPEG squeezed into 500 KB can easily need 2 to 5 MB as PNG. That size buys you a file that survives unlimited edits and re-saves.
Does the converted PNG have transparency?
The format supports it, but the picture itself starts fully opaque, because JPEG has no transparency to carry over. You can add transparent areas afterwards in any image editor.
Are my photos uploaded to a server?
No. The conversion runs on your device through the browser's Canvas API. Airplane mode after page load changes nothing.
Can I convert several JPEGs at once?
Yes. Drop them all in, convert, and download each PNG on its own or grab everything as one zip.
Do .jpeg and .jpg files both work?
Yes. They are the same format with two spellings of the extension. Both convert identically.