Compress WebP Online — Free, Fast & Private
WebP is already an efficient format, but further compression can squeeze out significant additional savings. MiniPx re-encodes your WebP files at your chosen quality level, often reducing size by another 20-40% beyond what the original encoder achieved. This is especially valuable for web developers optimising Core Web Vitals scores.
This additional compression is most effective when you have WebP files exported at high quality (90%+) from tools like Photoshop, Figma, or other design software. Re-encoding at quality 78% (Smart preset) produces no perceptible visual difference while shaving 20-40% off file size.
For websites with hundreds of WebP images, this optimisation compounds dramatically. If your average WebP file drops from 200KB to 130KB, a page loading 15 images saves over 1MB — a noticeable improvement in loading time, especially on mobile networks.
MiniPx processes everything in your browser. Your WebP files are never uploaded to any server, making it safe for proprietary website assets and confidential images.
If you are weighing whether to standardise on the format at all, what a WebP file actually is covers the container, its two compression modes and where it is still not accepted.
Going the other way, if what you need is a different format rather than a smaller WebP, the WebP converter handles it, for example WebP to JPG for apps that reject WebP, JPG to WebP for photos headed to a site, and PNG to WebP for graphics with transparency.
How WebP compares with other compressors on the same files is measured in the 2026 image compressor benchmark.