Shrink Images Without
Sacrificing Privacy.
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.
Instant File Compression
Drastically reduce the file size of heavy PNGs and JPEGs for faster website load times and easier email attachments.
Next-Gen Formats
Convert outdated raster images directly into highly-optimized WebP or JPEG formats to satisfy modern Lighthouse performance metrics.
Zero Cloud Exposure
Never risk breaking an NDA. Crush processes pixel data in your browser memory and natively strips hidden EXIF location data.
Under the Hood
The architecture powering Lumist Crush.
HTML5 Canvas Engine
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.
Inherent EXIF Scrubbing
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.
Frequently Asked Questions
Are my compressed images stored anywhere?
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.
Does converting to WebP make a big difference?
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.