Convert to WebP Online — Free & Private

Should you convert everything to WebP?

For images you serve on a website, yes — ideally with a JPEG fallback via the <picture> element so the rare older client still gets an image. For files you email or hand to someone directly, keep JPEG, because their tool may not read WebP.

The JPEG vs PNG vs WebP guide covers exactly when each format wins.

Converting transparent PNGs

WebP keeps transparency, so a transparent PNG converts cleanly to a much smaller WebP with its alpha channel intact. This is one of the easiest big wins for graphics-heavy sites.

Quality and settings

Quality 80 is a strong default for converting photos to WebP — visually identical to the source at a far smaller size. For graphics with flat color, WebP's lossless mode preserves every pixel and still beats PNG on size.

A worked example: converting a folder of JPEGs

Suppose you have twenty content images for a blog post, each a quality-85 JPEG averaging around 200 KB — about 4 MB total. Converting the batch to WebP at quality 80 typically brings each down to roughly 140 KB, for about 2.8 MB total. That is a 30% reduction in page image weight with no visible change, applied across the whole set in one pass.

Drop the whole folder in above, set the format to WebP, and download them all at once as a ZIP. Because nothing uploads, there is no per-file limit and no waiting on a server queue — the conversion runs as fast as your machine can encode.

Going further with AVIF

If you want to squeeze even more, AVIF compresses about 20–30% smaller than WebP on photos. It is best served alongside WebP via the <picture> element rather than as a wholesale replacement — see AVIF vs WebP for when each one wins.