Convert JPG photos into lossless PNG images in seconds.
Converting a JPG to PNG does not restore anything. Whatever detail the JPG encoder discarded is gone permanently, and wrapping those same pixels in a lossless format cannot bring it back. If your JPG looks blocky, the PNG will look identically blocky, only in a larger file.
What PNG does give you is a guarantee against further loss. Every time a JPG is opened, edited and saved again it goes through compression afresh, and the damage accumulates. Convert to PNG before a round of editing and each subsequent save is pixel-perfect.
Editing workflows are the main one. If you are about to crop, annotate or retouch an image across several sessions, working in PNG stops the generational quality loss described above.
Software requirements are another. Some design tools, game engines and print workflows expect PNG specifically. A few platforms require PNG for logos and app icons, since they need the transparency support even if your particular file has none.
It is also useful for adding transparency later. You cannot make a JPG transparent, but once it is a PNG you can erase a background in an editor and the transparency will be preserved when you save.
The PNG will be substantially bigger, typically three to ten times the size of the JPG, and that is normal. PNG stores every pixel faithfully rather than approximating, and photographs contain a great deal of fine variation that lossless compression cannot squeeze down much.
Photographs are where the gap is widest. Flat graphics, screenshots and images with large areas of a single colour compress far better in PNG and sometimes end up smaller than you would guess.
No. Quality already lost in the JPG cannot be recovered. PNG simply stops any further loss, which is useful if you plan to edit and re-save the image repeatedly.
For screenshots, logos, diagrams and anything with sharp edges or text, where JPG shows fuzzy artefacts.
No limit from us. Because the work happens on your device, very large files depend on your own memory.