🔒 Redact PDF Online
Draw black boxes over sensitive content – everything stays on your device.
Why Redact a PDF?
When you share documents—contracts, legal papers, medical records, or business reports—you often need to hide private details like names, phone numbers, financial figures, or personal identifiers. A simple black box drawn over the text is not enough if you just cover it visually; the underlying text can still be selected and copied. True PDF redaction removes the content permanently from the file, so nobody can recover it.
How This Free Online Tool Works
Our browser‑based redactor does all the heavy lifting directly on your device. Your file never leaves your computer – no upload to any server. Just:
- Open your PDF by clicking or dragging it into the tool.
- Navigate through the pages using the arrow buttons.
- Click and drag to draw redaction boxes over any sensitive area.
- Use Clear page or Undo last if you make a mistake.
- Press Redact & Download – you’ll get a new PDF where those areas are replaced with solid black, permanently.
When to Redact a PDF
- Legal documents: hide confidential client information before sharing.
- Medical records: protect patient privacy under HIPAA or GDPR.
- Business reports: mask financial data before sending to external stakeholders.
- Academic papers: anonymize review copies.
- Personal scans: remove your address, account numbers, or signatures from scanned documents.
Tips for Perfect Redaction
✦ Draw boxes slightly larger than the text to cover descenders and spacing.
✦ Double‑check every page before downloading – redactions are permanent in the saved PDF.
✦ If a page contains rotated elements, the tool works best with normally oriented pages.
✦ For ultimate privacy, consider also removing metadata using a separate metadata cleaner.
This tool uses the open‑source libraries PDF.js and pdf‑lib. No data is ever sent to a server. Your privacy is guaranteed.
