About CompressToWebP
CompressToWebP is a free, privacy-first image converter built for developers, designers, and anyone who cares about web performance. It converts JPG, PNG, GIF, and other common image formats to WebP — the modern format that loads faster and weighs less.
Unlike most online converters, compresstowebp.com does all processing directly in your browser using the native Canvas API. Your files never leave your device. There's no server involved, no account required, and no cost.
The "Compress to Size" mode is particularly useful when you have a specific KB target — for example, a CMS that rejects images over 200KB, or a platform with a strict avatar size limit. The tool uses binary search over WebP quality levels to find the highest quality that still fits under your target.
The site is ad-supported to stay free. If you find it useful, sharing it with others is the best way to support continued development.