Search "convert JPG to PNG" and you'll get pages of converters that all work the same way: you upload your image to their server, they convert it, you download the result, and your photo now lives on infrastructure you know nothing about, governed by a privacy policy you didn't read.
The better way: convert in the browser
Modern browsers can do the whole job locally. The Canvas API decodes your image, redraws it, and re-encodes it in the format you want. JPG, PNG or WebP, without one byte leaving your machine. It's faster too: no upload wait, no queue, no file-size upsell.
Quick format guide
- JPG, photos. Small files, no transparency, slight quality loss each re-save.
- PNG, screenshots, logos, anything needing transparency. Lossless but heavy for photos.
- WebP, the modern default: ~30% smaller than JPG at similar quality, supports transparency. Use it for websites; convert from it when an old system refuses it.
Common jobs, one answer each
"A website rejected my WebP file", convert WebP → JPG or PNG. "My photo is 8MB and the form wants 2MB", resize to ~1600px and export as JPG at 85% quality; that's usually a 10× saving. "I have 40 product photos to prep". That's a batch job: same settings applied to every file, converted locally, downloaded as a set.
Both our converters, single and batch, run entirely in your browser, free, no account, no upload, no watermarks. That's not a promotional claim so much as an architectural fact: there is no server-side conversion code to send your images to.
Single image converter · Batch converter, resize, compress and convert JPG, PNG and WebP with nothing uploaded.