In-Browser Image Compressor
Reduce PNG, JPG, and WebP file sizes up to 80% with configurable compression quality entirely in browser.
Your images are compressed 100% locally in your browser memory and are never uploaded.
Upload an image to compress
Drop a file here or click to browse
PNG, JPG, WebP up to 20 MB
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How local image compression works
ShadTools renders your uploaded image onto an offscreen HTML5 canvas element and re-exports it at your selected quality setting.
Examples
Compress high-resolution image
In: 2.5 MB PNG photo
Out: 450 KB optimized WebP image
Frequently Asked Questions
Are my photos uploaded to a server? +
No. All compression runs locally using HTML5 Canvas inside your browser.