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Lumist Crush converts formats, compresses file sizes, and strips hidden EXIF metadata entirely inside your browser. Stop uploading unreleased client assets to sketchy cloud compressors.
Drastically reduce the file size of heavy PNGs and JPEGs for faster website load times and easier email attachments.
Convert outdated raster images directly into highly-optimized WebP or JPEG formats to satisfy modern Lighthouse performance metrics.
Never risk breaking an NDA. Crush processes pixel data in your browser memory and natively strips hidden EXIF location data.
The architecture powering Lumist Crush.
Rather than sending your image to a backend server running FFmpeg or ImageMagick, Crush utilizes the browser's native hardware-accelerated <canvas> API. It paints the image into memory and re-encodes it locally.
Photos taken on modern smartphones contain EXIF metadata (GPS coordinates, camera models, dates). When Crush paints your image to a virtual canvas, only the RGB pixel data is transferred. The resulting exported file is cryptographically scrubbed of all metadata.
No. Because image files are incredibly heavy, storing them in your browser's IndexedDB would cause Lumist to rapidly consume your local storage. Crush is a purely stateless utility. Once you refresh the page or close the tab, the image data is purged from memory entirely.
Massive. WebP is a modern image format developed by Google that provides superior lossless and lossy compression. Converting heavy PNGs to WebP can often reduce file sizes by up to 70% with zero noticeable loss in visual quality, drastically improving your website's SEO scores.