JPG/JPEG to PNG — Online Image Converter
Convert JPG/JPEG to PNG online. Private, client-side — no uploadrequired. Fast batch converter.
About JPG/JPEG to PNG
JPG stores lossy photos without an alpha channel, so compression marks are baked into the pixels. PNG keeps the decoded picture exactly with lossless compression, which makes the file larger without restoring lost detail. There is no transparency to recover, since the source never had alpha. Text and sharp edges stay as soft as the source, so converting scans of documents gains little. Keep the JPG as the compact share and use PNG where an editor needs lossless intermediates for further edits.
Why convert JPG/JPEG to PNG?
- Larger files than lossy shares with PNG lossless quality.
- Keep quality where supported.
- Private, no upload - runs in your browser.
JPG/JPEG vs PNG
| Animation | No | No |
|---|---|---|
| Transparency | No | Yes |
| Compression | lossy | lossless |
| Typical use | JPG is the same JPEG codec under the three-letter extension from DOS-era naming. | PNG stores lossless images with transparency support. |
When not to convert JPG/JPEG to PNG
- Skip PNG for the smallest share: lossless output stays large, so prefer a lossy target when sending JPG/JPEG files.
- Keep a master copy: repeated exports stack small losses, so archive JPG/JPEG before batch PNG shares.
Limits
Starting point: JPG/JPEG - Small lossy photos for web pages and sharing. No transparency support, so alpha channels are dropped. Lossless quality means larger files than JPEG. Export PNG from JPG/JPEG at matched dimensions; every pixel maps across, so large sources stay large.
How conversion works
Conversion runs entirely in your browser with the WASM image engine. Files never leave your device.