JPG to WebP Converter
Convert JPG files to WebP instantly and privately. File Transmute runs entirely in your browser, so your JPG is never uploaded to any server.
Reviewed by Ismail Sab Ajnalkar · Updated July 2026
File converter
JPG (JPEG) is a compact, lossy image format ideal for photographs and web images where small file size matters. WebP is a modern image format that's roughly 25–35% smaller than JPG or PNG at similar quality, built for fast-loading websites. File Transmute turns your JPG into WebP right in your browser — no upload, no sign-up, and no daily limit. Because the conversion runs on your own device, even sensitive files stay private, and it keeps working offline once the page has loaded.
Best for
- Reducing photo file sizes to speed up a website
- Serving smaller images without a visible quality drop
- Cutting bandwidth on image-heavy pages or galleries
Good to know
WebP is usually smaller than JPG at the same visual quality, which is why it's the go-to web format for photos. Both are lossy, so avoid repeatedly converting back and forth. Very old browsers and some legacy software don't support WebP — keep a JPG fallback where that matters.
How to convert JPG → WebP
Drop your JPG file into the converter above — it stays on your device.
Choose WebP as the output. File Transmute picks the smartest settings automatically.
Click Convert and download your WebP file instantly.