JPG to PNG Converter
File ToolsJPG to PNG in batches, with the honest part up front: the file gets bigger, not better.
Your files never leave this device. Everything here runs in your browser — your files are never uploaded, stored or seen by us. Open your network tab and check.
PNG is lossless, so there is no quality setting — it stores every pixel exactly as it is now, including any damage an earlier lossy encode already did.
Add images. The format is read from the file itself, so a wrong extension will not fool it.
How this is calculated
JPG → pixels → PNG The JPG is decoded once. PNG then stores those pixels exactly, including every artefact the JPG already had. Quality cannot go up — discarded detail is gone File size goes up, often several times over Later edits stop costing quality, because PNG is lossless Transparency none — the JPG had none to carry over Nothing is uploaded. The conversion runs in this browser tab.
How it works
Converting a JPG to PNG does not undo JPG compression. When the JPG was saved, detail was thrown away to make it small, and nothing can recover it. What the conversion does is decode the JPG into pixels and store those pixels in a lossless format — so the picture you get is exactly the picture you had, artefacts included, in a much larger file.
For a photograph you only want to look at, that is not worth doing. It becomes worthwhile when an image is going to be edited and saved repeatedly. Every time a JPG is re-saved it loses a little more; a PNG can be opened, changed and saved any number of times without losing anything further. Converting once, before the editing starts, stops the damage accumulating.
The other common reasons are practical: a design tool, a print service or a submission form that accepts PNG only, or a graphic — a chart, a logo, a scan of printed text — that will be cropped, layered or annotated and has to keep its sharp edges from here on.
PNG does not give a JPG a transparent background. The JPG has no transparency to pass on, so the PNG comes out fully opaque, white areas and all. Cutting out a background is a different job from changing the format.
Worked example
A real 3840 × 2160 photograph, converted with this page in Chrome 151 on 13 September 2026
- JPG, high quality 1009.1 KB
- → PNG 5.00 MB +407% five times the size
- Pixels in memory 3840 × 2160 × 4 bytes = 31.6 MB
- The PNG keeps every one of them, compressed losslessly.
- The JPG had already discarded detail to reach 1 MB,
- and the PNG cannot put any of it back.
The same picture in five times the file — worth it only if you will keep editing
How to use it
- Drop your JPG files in, up to 30 at a time. Each is identified from its own bytes, so a mislabelled file is caught.
- PNG is already selected. There is no quality setting, because PNG is lossless.
- Convert and check the new sizes. Expect them to grow — the page warns you before converting a photograph.
- Download the PNGs, and keep the original JPGs as well: they are smaller files of the very same picture.
What this tool does not do
- It cannot improve quality. Blur, blockiness and detail lost in the JPG are carried into the PNG exactly.
- It will not add transparency. The PNG has an opaque background, the same as the JPG it came from.
- Files get larger, usually several times over. The 1 MB photograph in the worked example became 5 MB.
- Metadata is dropped. Re-encoding through a canvas removes EXIF data, including camera settings and GPS coordinates.
- One download per file rather than a zip.
- It runs in your browser, and every photo is decoded to full size first — a 4K image takes about 32 MB of memory while it converts — so a large batch is limited by your device.
Frequently asked questions
Does converting JPG to PNG improve quality?
No. JPG compression discards detail when the file is saved, and nothing recovers it. The PNG holds exactly the pixels the JPG decodes to, artefacts included. What PNG does give you is protection from here on: it can be edited and re-saved without losing anything further.
Why is my PNG so much bigger than the JPG?
Because PNG is lossless and JPG is not. In the worked example a 1009 KB photograph became a 5.00 MB PNG: the same 3840 × 2160 picture, stored without discarding anything. The size is not a sign of higher quality — the JPG already set the quality ceiling.
Will the PNG have a transparent background?
No. A JPG has no transparency, so there is nothing to carry across, and the PNG comes out fully opaque. Removing a background is a separate job from converting a format.
When is converting JPG to PNG worth it?
When the image will be edited and saved more than once, when a tool or form accepts PNG only, or when it is a graphic with text or sharp lines that will be cropped and annotated. For a photograph that only needs to be looked at or shared, keep the JPG — it is the smaller file of the same picture.
Are my images uploaded anywhere?
No. The conversion runs in your browser, and no network request carries your images. You can check: open your browser's network tab before converting and watch that none of them does — the only requests you will see after the page loads are small ones recording that the tool was used.
Should I convert to WebP instead?
If the image is going on a website, yes: WebP is far smaller than PNG and keeps the picture looking the same. If you are converting to stop quality loss while editing, no — WebP on this site is a lossy format, so re-saving it still costs a little each time, which is exactly what PNG avoids.
Is this different from the image converter?
It is the same converter, opened with PNG selected, and the advice on this page is about JPG to PNG specifically. You can still choose JPG or WebP as the output.
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Last updated 13 September 2026.