Privacy

Verimark is a 100% client-side web application. Your files are processed entirely in your browser and never uploaded to any server.

What we don't collect

• Files you watermark
• Watermark text or hash values
• Personal identifiers

What we do

Run static JavaScript in your browser. The site is served from a CDN (Vercel) which may log standard HTTP request metadata per their privacy policy. We do not control or use this data.

Network monitor

Verimark monkey-patches window.fetch and XMLHttpRequest.prototype.send to display a live "0 bytes uploaded" counter. This is for transparency — verify in DevTools that no data leaves your device.

Hash provenance

When you watermark a file, its SHA-256 hash is computed locally via the Web Crypto API. The hash is embedded in the watermark text and a QR code, allowing the recipient to re-hash their file and confirm it matches.