Convert JPEG to WebP

Re-encodes JPEG as WebP, typically 25 to 35 percent smaller at comparable visual quality.

What to expect

This is a second lossy encode on already-lossy data, so some additional detail is lost.

Why convert JPEG without uploading

Most online converters take your file, send it to their servers, convert it there and hand back a download link. That means your document sits on someone else's disk, subject to their retention policy and their breaches. It also means you cannot use them offline, and cannot use them at all for anything confidential.

frogConvert does the conversion in the page itself, with the browser canvas. There is no upload step because there is no server. You can disconnect from the network and it still works.

About the formats

JPEG

The dominant photographic format, using discrete cosine transform compression that discards detail the eye is least likely to notice. It has no transparency, and every re-save loses a little more. More about JPEG files.

WebP

Google's image format, with both a lossy mode derived from VP8 and a true lossless mode, plus alpha and animation. It generally beats JPEG and PNG on size at matched quality. More about WebP files.

Common questions

Is my file uploaded when converting JPEG to WebP?

No. The conversion runs entirely in your browser. The file never leaves your device, there is no server to upload to, and the page works offline once loaded.

Is JPEG to WebP conversion free?

Yes, with no account, no watermark and no file limit per day. frogConvert is open source and there is no server cost to recover, because your device does the work.

How large a file can I convert?

Up to 2 GB for a single file, 500 MB total per batch, and 300 files at once. The practical limit is your device's memory, since everything is processed locally.

What is lost converting JPEG to WebP?

This is a second lossy encode on already-lossy data, so some additional detail is lost.