Convert JPG to PNG
Converting JPG to PNG gives you a lossless copy that survives repeated editing and saving without compounding compression artifacts — the right move before heavy retouching. To be clear about what it won’t do: it cannot restore detail the JPG already discarded. It just stops any further loss.
Need the other direction? Convert PNG to JPG
How it works
Load the JPGs you are about to edit heavily; each decodes once on your device and never touches a network.
The tool writes true lossless PNGs — no slider exists here because there is nothing left to trade away.
Take the converted files into your editor knowing further saves cost nothing, and keep the original JPG as the archive copy.
JPG vs PNG
Nobody wins this comparison on size — the PNG will be several times larger and look identical. What you are buying is a freeze on generational loss: from this file onward every edit and re-save is exact, which is what a retouching session needs and a photo archive does not.
| JPG | PNG | |
|---|---|---|
| Compression | Lossy | Lossless |
| Transparency | No | Yes (full alpha) |
| Animation | No | No |
| Support | Universal — the safest format there is | Universal — every browser, editor and OS |
| Best for | Photographs and strict upload forms | Logos, screenshots, graphics with transparency |
Frequently asked questions
No — that is the whole reason I built this. The conversion runs in your browser using WebAssembly, so your files never leave your device; there is no server in the loop at all. It also means the tool keeps working offline once the page has loaded, and there is no file size limit beyond your device’s memory.
No, and I won’t pretend otherwise: detail the JPG compression already discarded is gone for good. What PNG gives you is a lossless container from here on — you can edit and re-save repeatedly without stacking new artifacts on each save.
PNG compresses losslessly, so it cannot discard data the way JPG does. A 500 KB photo JPG commonly becomes a 3–5 MB PNG. That is the honest cost of lossless storage.
JPGs contain no transparency to begin with, so the PNG will be fully opaque. Transparency matters going the other direction — preserving alpha from formats that have it.
Archive the JPG you already have: it is the closest thing to the original capture, and converting to PNG cannot add anything back. Make the PNG when a workflow demands it — retouching sessions, compositing, tools that only accept PNG. Storing PNGs "for safekeeping" just multiplies disk usage by 6–10× with zero quality gain.
If your goal is a smaller or web-ready file, this is the wrong direction entirely — a 500 KB JPG becomes a multi-megabyte PNG. Head to JPG to WebP for that. The PNG conversion earns its keep in exactly one scenario: you are about to edit the image repeatedly and want the generational loss to stop here.
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