JPG to PNG Converter
Convert JPEG images into lossless PNG files, with transparency support ready for further editing.
Convert with this tool
or choose a file from your device — it is processed in this tab and never uploaded
Accepted: JPEG, JPG
Files stay on your device. There is no upload, no queue and no watermark, so a conversion works even with the network switched off after the page has loaded.
Supported formats & processing
| Accepted input | JPEG, JPG |
|---|---|
| Produced output | PNG with lossless compression and full alpha support |
| Processing | Web Audio API + canvas + native JavaScript encoders |
| Upload required | No — the file is read locally and never transmitted |
How to use this tool
- Add the .jpg fileThe image is decoded at full resolution.
- Leave the size unchangedConversion alone does not need resizing; add it only if you also want smaller dimensions.
- Choose PNG as the output formatThis is the default on this page.
- ConvertPNG encoding is lossless, so the pixel data is written exactly as decoded.
- Download and continue editingThe result card reports the encoding of the source and the new file size.
About this tool
JPEG and PNG solve different problems. JPEG is a lossy format tuned for photographs, achieving small files by discarding high-frequency detail. PNG is lossless and supports an alpha channel, which makes it the right choice for logos, screenshots, diagrams, text overlays and anything that will be edited again.
Converting JPEG to PNG cannot restore the detail the JPEG already discarded, and it will usually produce a larger file. What it does give you is a file that will not lose anything further when you open, edit, crop and re-save it repeatedly — which is exactly what happens in a design workflow.
Features
- Lossless PNG output with no quantisation step
- Full alpha channel support in the output format
- Reports whether the source JPEG was baseline or progressive
- Correct handling of CMYK JPEGs on decode
- Optional resizing and cropping in the same pass
- No upload and no watermark
Frequently asked questions
Will the PNG look better than the JPEG?
It will look identical, because the PNG contains exactly the pixels that were decoded from the JPEG. It will not recover detail the JPEG discarded. The benefit is stability under further editing, not better appearance.
Why is the PNG so much larger?
PNG stores every pixel losslessly. A 1 MB JPEG can become a 5–10 MB PNG at the same dimensions. That is the price of a file that survives repeated edits.
Can I get a transparent background this way?
Not from a JPEG — JPEG has no alpha channel, so everything is opaque. Use the image cropper or an image editor to remove a background after converting to PNG.
Should I use PNG for photographs on my website?
No. PNG is far larger than JPEG or WebP for photographic content. Use PNG for graphics, screenshots and images with transparency, and WebP or JPEG for photographs.