PNG to JPG
PNG to JPG conversion, with the quality and size consequences stated up front.
Why convert PNG to JPG
PNG files of photographs are often ten times larger than the same picture as a JPEG, because PNG is lossless and does not model photographic noise efficiently.
What you give up
Transparency is lost. JPEG has no alpha channel, so transparent regions are filled — most encoders use black, which produces a dark rectangle around a logo. If you need transparency, convert to WebP instead.
When it is the right move
Do this when the destination needs a small file and the image is a photograph with no transparency and no fine text. Screenshots and diagrams should stay PNG — converting them to JPEG makes them larger and blurrier.
Size, honestly
Typical saving of 70–90 percent on photographic content; near zero or negative on flat-colour graphics.
Why this runs in your browser
The file is read from your disk by the browser, decoded with the browser's own codecs, and re-encoded in this tab. No upload request is made, nothing is queued on a server, and closing the tab leaves no copy anywhere. You can verify this in the network panel while it works.
How to use it
- Drop one or more PNG files on the drop zone.
- Set the output format to JPG.
- Convert and check the reported before-and-after file sizes.
- Open the result and check transparency and edge detail before shipping it.
Worth knowing
- Output format is JPG and input is read as PNG.
- Size expectation for this direction: Typical saving of 70–90 percent on photographic content; near zero or negative on flat-colour graphics.
- Conversion happens in the browser; no file leaves your machine.
- Metadata is discarded by the canvas round-trip.
Limitations
- Transparency is lost. JPEG has no alpha channel, so transparent regions are filled — most encoders use black, which produces a dark rectangle around a logo. If you need transparency, convert to WebP instead.
- Animation is not preserved when converting from an animated source.
- Converting between two lossy formats compounds compression artefacts.
- Writing JPG depends on your browser exposing that encoder.