Convert JPG to PNG
Lossless from here on — but it cannot undo what JPG already did.
- Step 1Drop your imagesAnywhere on the page
- Step 2Convert to PNGAlready selected for you
- Step 3Download the resultOne file or a zip
This conversion is worth doing for some reasons and pointless for others, and it is only fair to be clear about which is which.
The genuine reasons are about what happens next. PNG is the right intermediate when you are about to edit an image repeatedly, because each save no longer degrades it further. It is also what you want when you need to add transparency, since JPG cannot store an alpha channel at all — you convert first, then erase the background in an editor.
Expect the file to grow substantially, often by several times, especially for photographs. That is not a fault in the conversion; it is the cost of storing every pixel exactly.
Quality preserved
What it cannot do
Converting a JPG to PNG does not restore quality. JPG permanently discarded detail when the file was first written, and PNG has no way to recover information that is no longer in the file. What you get is a lossless copy of an already-lossy image — every compression artefact from the original, now preserved perfectly and in a considerably larger file. If someone told you converting to PNG would improve a blurry photo, it will not.
Not sure it held up? Every result has a Compare button — drag the divider to see your original against the processed version at full size.
Common questions
Will converting to PNG improve my compressed photo?
No. The detail JPG discarded is gone from the file and cannot be reconstructed. PNG only guarantees that no further quality is lost from this point onward.
Why is the PNG so much bigger than the JPG?
PNG stores every pixel exactly rather than approximating them. For photographic content that is typically several times the size of the equivalent JPG, which is the trade you are making for losslessness.
Does this add transparency to my image?
It makes transparency possible, but does not create any. The converted PNG is fully opaque; you would then erase or mask areas in an image editor.