How these converters work
Every tool on this site does the same three things: it reads your file from disk, decodes it with the image decoder already built into your browser, and re-encodes the pixels to the format you asked for using an HTML5 canvas. All three steps happen on your own machine.
That design has real consequences. There is no queue and no upload wait, so conversion takes about as long as opening the file. It keeps working after the page has loaded even if your connection drops. And because no server ever receives your images, there is no copy of them anywhere for anyone to leak, retain or scan.
Which format should you choose?
- PNG is lossless. Choose it for logos, icons, screenshots of text, and anything you will edit repeatedly or that needs transparency. Photographs stored as PNG get very large.
- JPG is the universal photographic format. Choose it when compatibility matters most — upload forms, print labs, older software — or when you need a photograph to be small and it has no transparency.
- WebP is the modern web format. Choose it for images you are publishing online: roughly 25–35% smaller than JPEG at the same quality, with transparency support that JPEG lacks.
Frequently asked questions
Are my images uploaded to a server?
No. Every converter here runs on your own device using your browser's image decoder and HTML5 Canvas. The site is static, with no backend and no upload endpoint, so there is nowhere for a file to be sent. You can confirm this in the Network tab of your browser's developer tools.
Are these converters free?
Yes. There is no sign-up, no watermark and no daily quota. Running costs are covered by advertising, which is kept clearly labelled and separate from the tools.
Can I convert several images at once?
Yes. Every converter accepts multiple files, processes them one at a time so the page stays responsive, and offers a single ZIP archive of the results.
Which formats are supported?
Conversion between WebP, PNG and JPG in the combinations listed above. These are the formats every browser can both decode and encode natively, which is what makes instant, private, in-browser conversion possible.
Do these work on a phone?
Yes. Every page is responsive and works in mobile Chrome, Safari, Firefox and Edge. Very large images may fail on phones because of tighter memory limits.
Why is there no HEIC converter?
Browsers cannot decode HEIC natively, so an in-browser HEIC tool would need to download a large WebAssembly decoder. That would slow every page load, so it is deliberately not offered here.