Compress WebP Online
Reduce WebP file size online. Drag the quality slider, watch the size drop, download. Everything happens in your browser — nothing is uploaded.
Why use this tool
Pick the right quality
60–75% is the sweet spot for most photos — the file often shrinks by half or more with no visible difference. Go lower (30–50%) for thumbnails or background images where sharpness matters less.
Want it even smaller?
WebP is already one of the most efficient formats — pairing compression with the Resize tool is the next lever if you need to go smaller.
How to compress a WebP
- Upload — drop your WebP file(s) onto the box or click to browse.
- Tune — drag the quality slider — the result updates for the next file you add
- Download — each compressed file shows its before/after size and savings.
Frequently asked questions
Does compression reduce quality?
WebP is a lossy format, so yes — but at 70%+ the difference is invisible for most photos. You can always re-run with a different setting; the original file on your device is never modified.
What's a good target size?
For web images, under 200 KB is a good goal for a large hero photo and under 50 KB for thumbnails.
Is this tool free?
Yes — every tool on ConvertPicto is completely free, with no account, no watermark and no file limits. The site is supported by ads.
Are my images uploaded to a server?
No. ConvertPicto runs entirely inside your browser using the Canvas API. Your files are read locally, processed on your device and never sent anywhere — we don't even have a server that could receive them.
Does it work on my phone?
Yes. The site is fully responsive and works in any modern mobile browser (Chrome, Safari, Firefox, Edge). Processing large images is naturally slower on a phone than on a laptop.