Converting an image shouldn’t mean uploading it anywhere. Our new Image Format Converter draws your image to a canvas and re-encodes it with the browser’s own image encoder — the file never leaves your device.
- Three output formats — PNG, JPEG, and WebP, picked from a simple dropdown, with the conversion updating instantly.
- A quality slider that tells the truth — it’s enabled for JPEG and WebP, where it actually changes the output, and disabled for PNG, which is always lossless and has nothing for it to control.
- No silent black backgrounds — JPEG has no transparency channel, so converting a transparent PNG to JPEG fills the transparent areas with white before encoding, instead of letting them turn black the way a naive conversion would.
- A real size comparison — original and converted file sizes shown side by side, e.g. “Original: 2.4 MB PNG → Converted: 340 KB JPEG at 80% quality,” so you can see exactly what the trade-off bought you.
- Honest about WebP support — on the rare old browser that can’t
encode WebP,
canvas.toBlob()returns nothing rather than a file, and this tool catches that and tells you plainly instead of handing you a broken download link. - Private by default — the whole conversion happens in an in-memory canvas in your own browser; nothing is ever uploaded to a server.
Drop in a screenshot, a photo, or a logo and see the size difference for yourself before you download anything.