Convert JPG to WebP
The web's classic photo format upgraded to its successor — smaller files, converted on your own device.
Drop your image here
or
JPG, PNG, WebP, HEIC, SVG — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
JPG built the visual web; WebP is its efficiency upgrade — the same photo typically lands 25–35% smaller at matching visual quality. For anyone publishing images, that reduction is pure page speed: faster loads, better Core Web Vitals, less bandwidth on every visit.
The conversion decodes each JPG and re-encodes it as high-quality WebP in your browser — batches welcome, nothing uploaded. Keep the originals as masters; the WebP copies are the ones your pages serve.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Choose quality or size
Pick a quality preset, set an exact KB target, or switch the output format — tuned for jpg to webp.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
How much smaller will my JPGs get as WebP?
Typically 25–35% at equivalent visual quality — sometimes more for graphics-heavy images. The exact saving varies per photo, and the size comparison shows immediately after converting.
Will the conversion make my photos look worse?
Not visibly — the encode runs at high quality, and WebP compresses smarter, not harder. The pixels your visitors see stay indistinguishable while the bytes drop.
Does any browser still lack WebP support?
Support is effectively universal in current browsers — WebP has shipped in all major ones for years. Only long-retired browser versions predate it, which is why sites serve WebP by default now.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.