02 / build•Secure Asset Compression

Shrink Images Without Sacrificing Privacy.

Lumist Crush converts formats, resizes dimensions, and strips hidden EXIF metadata entirely inside your browser. Stop uploading unreleased client assets to third-party cloud compressors.

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100% Client-Side MemoryHardware-AcceleratedZero Cloud Uploads

lumist.app/crush/workspace

5.2 MB840 KB

Capabilities

Built for Precision and Total Privacy

Instant File Compression

Reduce PNG and JPEG file sizes by up to 70% in browser memory for instant website load times and lightweight email attachments.

Next-Gen WebP Re-Encoding

Convert legacy raster formats directly into optimized WebP and JPEG payloads to maximize modern Google Lighthouse performance scores.

Zero Cloud Exposure

Protect NDA-governed assets. Crush processes raw pixel data inside client memory buffers and strips sensitive GPS and camera metadata before saving.

Under The Hood

The Architecture Powering Lumist Crush

Processing

HTML5 Canvas API Engine

Crush executes image compression directly on your local graphics hardware using the browser's native <canvas> API. It paints pixel data into memory and re-encodes the buffer without proxying your files to an external FFmpeg or ImageMagick server.

Verified Zero-Server Execution

Privacy

Cryptographic EXIF Scrubbing

Photos taken on mobile devices contain hidden EXIF tags, including GPS coordinates, camera serial numbers, and timestamps. When Crush paints an image onto an offscreen canvas, only the raw RGB matrix transfers. All embedded metadata is automatically stripped.

Verified Zero-Server Execution

Clarity & Trust

Frequently Asked Questions

Are compressed images stored on any remote server?

Crush operates as a purely stateless utility, storing zero image bytes on remote servers or local IndexedDB databases. To protect your hard drive from cache bloat, Crush purges all image buffers from memory the moment you refresh or close the browser tab.

Does converting to WebP improve website performance?

WebP provides superior compression density compared to legacy PNG and JPEG formats. Converting heavy assets to WebP typically cuts file size by 50% to 75% without perceptible fidelity loss, drastically accelerating Core Web Vitals.

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