Image Converter
PNG, JPEG and WebP, with resizing — entirely in your browser.
Ignored by PNG, which is lossless.
0 keeps the original size. Aspect ratio is preserved.
How it works
The file is read into a canvas and re-encoded from there, using the image codecs already built into your browser. Nothing is uploaded, no server sees the picture, and the work happens at local disk speed rather than twice across your connection.
Two things worth knowing about what re-encoding costs you. Converting to JPEG or WebP discards data permanently, so going JPEG to PNG does not restore anything — it just stores the already-lost detail in a larger file. And canvas re-encoding strips metadata, which deletes your EXIF: camera model, timestamp, and GPS coordinates if the photo has them. That is usually what you want before publishing a picture, and occasionally exactly what you did not want.
Common questions
Is my image uploaded?
No. The conversion uses your browser's own canvas and codecs. You can disconnect from the network after the page loads and it still works.
Which format should I pick?
WebP for the web — roughly 25-35% smaller than JPEG at the same quality, and supported everywhere current. JPEG for maximum compatibility with older software. PNG only when you need transparency or lossless pixels, such as screenshots and line art.
Why did my PNG get bigger as a PNG?
PNG is lossless, so re-encoding a photograph as PNG stores every pixel exactly — including the JPEG compression artefacts. Photos belong in JPEG or WebP.