Useful Hacks

Redact PDF

Black out sensitive content, remove what's underneath, and strip document metadata.

Processed entirely in your browser. Your file is never uploaded to a server. Redacted pages are converted to an image with the boxes burned in, so the underlying text and data are removed — those pages lose selectable text. Document metadata (title, author, subject, keywords) is stripped from the output too.
  • Free — no signup, no account, no watermark
  • Runs entirely in your browser — nothing is uploaded to a server
  • Works on mobile, tablet and desktop
  • Instant — results appear as soon as you enter your input

Why this is private

  • Processed entirely in your browser. Your file is never uploaded to a server. Redacted pages are converted to an image with the boxes burned in, so the underlying text and data are removed — those pages lose selectable text. Document metadata (title, author, subject, keywords) is stripped from the output too.
  • Open your browser's DevTools → Network tab while using this tool — you won't see a request carrying your input, because it never leaves your device.
  • Nothing you enter is uploaded to a server or shared with us — the processing happens entirely on your device.

Overview

Draw boxes over anything sensitive. On export, every page you marked is rendered to an image with the black boxes painted in and re-embedded — so the text, form data and vectors beneath are genuinely gone, not just covered, unlike simply painting a black rectangle over live text (which leaves the underlying text fully copyable — a well-known, real-world redaction failure). Pages you don't mark are copied through untouched and keep their selectable text. The output's document metadata (title, author, subject, keywords) is also stripped, since a perfectly redacted page can still leak the same sensitive information through leftover metadata a user would have no reason to check separately.

How to use it

  1. 1Drop in the PDF.
  2. 2Drag a box over each thing to hide (on any page).
  3. 3Apply — marked pages are flattened and document metadata is stripped. Download the redacted PDF.

Frequently asked questions

What people use it for

Remove personal data before sharingBlack out names, addresses, account numbers or signatures so they can't be copied back out.
Redact a document for a public or legal releasePermanently hide privileged sections while leaving the rest of the file selectable.
Hide pricing or salary figures in a sampleSend a contract or offer as a template with the sensitive numbers genuinely gone, not just covered.
Sanitise a screenshot-heavy PDFCover tokens, emails or internal URLs visible in pasted screenshots before circulating.

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