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Redact PDF

100% In-Browser Sandbox

True irreversible redaction. Draws opaque redaction blocks, purges underlying text tokens, removes search index references, and sanitizes document metadata.

Redact PDF

True irreversible redaction. Draws opaque redaction blocks, purges underlying text tokens, removes search index references, and sanitizes document metadata.

Permanent Redaction Warning: Text tokens and vector elements within redacted regions are irrevocably purged. Metadata is sanitized.
True redaction permanently removes content before export. 100% client-side.

How to Use Redact PDF

  1. Step 1: Upload confidential PDF
  2. Step 2: Draw black-out redaction boxes over sensitive data
  3. Step 3: Review warning and confirm permanent redaction
  4. Step 4: Download sanitized PDF

Technical Specifications & Limitations

  • Maximum file size: 50 MB.
  • Permanent redaction: Purges underlying text tokens and covers coordinates with opaque black rectangles; cannot be undone after export.
  • Sanitizes document metadata (Author, Producer, Title).

Troubleshooting Common Issues

⚠Redaction box moved when resizing.

Click and drag from the corner handles to resize, or delete and draw a fresh box over the target text.

⚠Can someone copy text from behind the black box?

No. Unlike amateur tools that merely place a black rectangle, SciHive's export flattens the redacted page area into sanitized vector blocks.

🔒Privacy & Security Guarantee

All PDF processing for Redact PDF occurs 100% inside your local web browser sandbox using WebAssembly and client-side JavaScript. Your documents, images, and data are never transmitted over the internet or saved to external servers. Full confidentiality is preserved for sensitive scientific research, financial records, and legal contracts.

Frequently Asked Questions

Is this true redaction or just a cosmetic cover?

It is true redaction. The underlying text tokens and search index references are destroyed before the sanitized PDF is generated.

Are my confidential files uploaded anywhere?

Never. Redaction is computed strictly inside your browser sandbox.

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