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01 / Local privacy gate

Hushmark

Hushmark turns a nervous handoff into a calm review. It detects sensitive information locally, lets you inspect every finding, and exports a secure copy. The Mac app also processes multiple files into a folder you choose.

Hushmark document review interface showing selected redactions and a safe preview

The useful bit

Make the
mechanism
visible.

Built for the moment before you paste a document into an external model. The web app is now available as a local-first beta. Hushmark turns a nervous handoff into a calm review. It detects sensitive information locally, lets you inspect every finding, and exports a secure copy. The Mac app also processes multiple files into a folder you choose.

  • Choose the browser version or install the Mac app
  • Mac batch mode processes multiple files into a secure folder
  • Files stay on your device in both versions
  • PDF, DOCX, TXT, and HTML support
  • Three-layer detection with review before export
  • Manual blackout areas for anything automation misses

Privacy notes ↗Terms of use ↗

Use the browser version for one file, or install the Mac app to redact multiple files into a secure folder. Both process documents on your device.

One-time purchase. Universal Mac app for Apple Silicon and Intel, signed and notarized by Apple.
Buy for Mac · $4.99 ↓Use browser version ↗

FAQ

Before you
install.

Which version should I use?+

The browser version starts immediately for one file. The Mac app packages the local workflow on your computer and adds batch redaction for multiple files. Both versions process documents on your device.

Why does macOS show a warning?+

The current preview is not notarized by Apple yet. After the first blocked attempt, open System Settings → Privacy & Security and choose Open Anyway. The screenshot and full steps are above.

Do my documents leave my device?+

No. Hushmark processes files locally and does not require an account or upload document contents to a Hushmark server.

What files are supported?+

PDF, DOCX, TXT, and HTML files up to 25 MB or 500,000 characters. Always review the findings and saved copy before sharing.