Client-side image compression
Convert between WebP, JPEG and PNG, adjust quality and resize — the image is processed with the Canvas API right in your browser and never uploaded. WebP usually gives the smallest files.
Image Compressor & Converter
Compress and convert images to WebP, JPEG or PNG — resize and shrink file size, all in your browser.
Frequently asked questions
Are my images uploaded to compress them?
No. Compression and format conversion use the browser's Canvas API, so images are processed entirely on your device and never uploaded — unlike most online compressors.
Which formats and options are supported?
Convert to WebP, JPEG or PNG, adjust a quality slider and optionally resize by maximum width. The tool shows the original and compressed sizes and the percentage saved.
Which format should I choose?
WebP usually gives the smallest files at good quality for the web. Use JPEG for photos when WebP is not an option, and PNG when you need lossless quality or transparency.