Tool · runs in your browser
Convert PNG, JPG & WebP —
without uploading a thing.
Change an image between PNG, JPG, and WebP — any format to any other — with a quality slider for JPG and WebP. Conversion runs entirely on your machine, so your images never leave your device. No signup, no watermark, no upload queue.
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Frequently asked questions
- Are my images uploaded to a server?
- No. Every image is decoded and re-encoded locally in your browser using the built-in canvas — nothing is uploaded. Once the page has loaded you can go offline and it still works. You can confirm it yourself in your browser's Network tab: no image data leaves the page while you convert.
- Which conversions are supported?
- Any-to-any between the three most common web formats: PNG, JPG (JPEG), and WebP. That covers PNG to JPG, JPG to PNG, PNG to WebP, WebP to PNG, JPG to WebP, and WebP to JPG. Drop a batch of mixed formats and they all convert to the one target you pick.
- Why does a transparent PNG turn black when I convert it to JPG?
- That's the classic gotcha: JPG has no transparency, so on most tools the see-through pixels become black. This converter avoids it by painting a background colour behind the image first — white by default, or any colour you choose — so the transparent areas come out clean instead of black. Convert to PNG or WebP instead if you need to keep the transparency.
- Will converting lose quality?
- PNG is lossless, so converting to PNG never loses quality (it can make photos larger, though). JPG and WebP are lossy: use the quality slider to trade file size against fidelity — around 90% is visually indistinguishable from the original for most photos. You see the before-and-after size on every file.
- What about AVIF?
- AVIF isn't offered yet. Browser support for encoding AVIF from a canvas is still limited to Chrome, so shipping it now would fail silently on Safari and Firefox. We'd rather offer the three formats that convert reliably everywhere than a fourth that only works in one browser. It's on the list for when support is broad.
- Is there a limit, and does it work on mobile?
- You can convert a batch at once with no account or paywall. Very large images are capped only to keep the browser tab from running out of memory — the vast majority of photos are well under that limit. It runs in any modern browser on Windows, macOS, Linux, Android, and iOS, and keeps working offline once loaded.