Convert JPG to PNG
Some software insists on PNG. Convert here in your browser — but read the first section, because this conversion does less than people expect.
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An honest warning first
Converting a JPG to PNG does not improve it. This is the single most common misunderstanding about image formats, and it is worth being plain about even though it makes this page less appealing.
JPEG discards information when the file is first saved. That information is gone from the file — no later conversion can reconstruct it. Saving the result as PNG preserves every pixel of the already-degraded image perfectly, including its compression artefacts. What you get is a lossless copy of a lossy picture, typically three to five times larger than the JPG, and visually identical to it.
So convert to PNG when something downstream requires PNG. Do not convert hoping to recover quality, because nothing can.
When you genuinely need PNG
- A tool, printer driver or upload form that rejects JPEG outright.
- An image you are about to edit repeatedly — re-saving JPEG over and over compounds the artefacts each time, while PNG does not degrade.
- Anywhere you need a format that supports transparency, before adding transparency in an editor.
- Archival of an image you have already edited, where you want no further loss from this point on.
Why the file gets bigger
PNG compression is lossless: it finds repetition and encodes it compactly, but it never throws anything away. Photographs have very little exact repetition — every pixel of sky is slightly different from its neighbour — so there is little for it to exploit. JPEG, by contrast, is allowed to simplify what the eye will not miss, which is precisely why it is so much smaller. The size increase is not a fault in the conversion; it is the definition of lossless.
Questions
+ Does converting JPG to PNG improve quality?
No. The quality lost when the JPEG was created cannot be recovered. The PNG is a perfect copy of an imperfect image, and it will be several times larger.
+ Will the PNG have a transparent background?
No. A JPEG has no transparency to preserve, so the background stays exactly as it looks. Removing a background is an editing operation, not a conversion.
+ Why is my PNG so much bigger than the JPG?
Because PNG is lossless and photographs contain almost no exact repetition for it to compress. Three to five times larger is normal.
+ Is there any quality loss in this conversion?
None at all. PNG stores every pixel of the decoded JPEG exactly. The loss already happened, earlier, when the JPEG was made.
+ Are my files uploaded?
No. Everything runs in your browser and no file is transmitted.