JPG to PNG converter

The honest reason to do this

Being honest about this one: converting JPG to PNG does not improve the picture, and any site claiming otherwise is wrong. The compression loss happened when the JPG was written and cannot be undone.

What it is genuinely for is a requirement further down the line. An upload form that only takes PNG. A design tool that places PNG cleanly and JPG awkwardly. A file about to be edited repeatedly, where you want each save to stop losing a little more.

That last case is the real one. Each time a JPG is opened, edited and saved, it is compressed again. After several rounds the artefacts stack up. Moving to PNG once, at the start, stops the bleeding.

What the conversion changes

• Nothing more is lost from here on. PNG stores exactly what it is given.
• The file gets much bigger: around 15 to 25 MB for a 12-megapixel photo, and roughly the same whether the JPG you started from was 500 KB or 4 MB.
• No transparency appears. A JPG has none to begin with, so the PNG comes out fully opaque. You will still need an editor to cut a background out.

What the PNG is actually preserving

It is worth being precise about what the word "lossless" is promising here, because it is not what most people hear. PNG preserves what it is handed. What it is handed is a JPG that has already been through compression once — so the ringing beside the text, the faint blocky patches in a flat sky, the slight mottling in a shadow are all part of the picture now, and the PNG preserves those with the same perfect fidelity as everything else.

That has a cost nobody expects. PNG compresses by finding exact repeats — a run of identical pixels, a row that matches the row above. A clean photograph gives it very little of that, and JPG artefacts give it less than nothing: the mottling in what should be flat sky is noise, and noise is precisely what defeats a pattern matcher. A PNG made from a heavily compressed JPG is often larger than a PNG made from a clean original of the same scene, because it has more randomness to store.

Two smaller facts about the file that comes out. It carries no metadata: a JPG straight off a phone has EXIF in it with the camera model, the timestamp and often the GPS coordinates, and none of that survives, because the PNG here is written from decoded pixels rather than copied across. PNG is capable of carrying that information; this one simply does not have it.

And the picture is written at 8 bits per channel in sRGB — the same depth the JPG already had, so nothing is lost on the way, but not the 16-bit file PNG is capable of either. From this point on, though, the promise does hold: open it, edit it, save it, repeat, and every save is exact. That is the whole thing you came for.

What this conversion cannot do

Converting a JPG to PNG

1. PNG is already selected above.
2. Drop your JPG images in, or click to browse.
3. Download the result. It never left your device.

Do this once, at the start of the editing, rather than at the end — after the damage there is nothing left to protect.

If a smaller file was the point

• JPG to WebP Roughly a third off a photo, with no visible change.
• HEIC to PNG For when the next tool in the chain insists on PNG.
• WebP to PNG The one to pick when the image has a transparent background.
• AVIF to PNG Keeps the transparent background that JPG would flatten.

Or open the image converter to pick any combination, and the image compressor when the problem is size rather than format.