Privacy Architecture

How ByteSlim guarantees your files never leave your device — private by architecture, not by promise. There is no file-receiving server in our processing pipeline.

The processing flow

1. File API — your browser reads the .pptx locally
2. Web Worker / WASM — images and structure optimized on-device
3. Local Blob — the result stays in browser memory
4. Download — you save a new copy; the original is untouched

At no point does a file transfer step exist between steps 1 and 4.

Verify it yourself in 30 seconds

1. Open ByteSlim and press F12 to open browser DevTools
2. Go to the Network tab
3. Drop a PPTX into the compressor and let it finish
4. No request carries your file — the only traffic is loading page assets

The compressor shows a live "Network: 0 file uploads" status while you work.

What we collect — and don't

• We never receive your files, file names, or file contents — they are processed entirely inside your browser tab
• No accounts, so no profile is built about you
• Anonymous page analytics only: aggregated, anonymous page-view statistics (browser type, coarse region, referrer) — never file data
• Compression always produces a new copy; your original file is never modified