Permanently Redact Sensitive Information from PDFs Offline
Black out sensitive text and images in PDFs entirely in your browser. No cloud risk. 100% secure local processing.
Why Redact PDFs Locally?
Redacting means the content is classified. Uploading a document you need to hide defeats the whole purpose. Our tool runs 100% offline.
How to Permanently Redact a PDF
Open Sensitive Document
Load the PDF with data that must be hidden.
Mark Redaction Areas
Draw boxes over content to permanently erase.
Apply & Download
Content is permanently deleted from the PDF structure.
100% Secure Local Processing
All operations are performed directly on your local device. We use advanced WebAssembly technology to process your documents without ever uploading them to external servers, ensuring complete privacy.
True Permanent Redaction — Not Just Black Boxes
Unlike tools that merely cover text with black boxes, our redaction permanently deletes the underlying data from the PDF object structure.
Redact Entire Documents Instantly
Apply hundreds of permanent redactions to large documents in seconds, completely offline.
Permanent Sanitization: Mitigating Vector & Glyph Extraction
Unlike naive tools that simply overlay black rectangles over text (leaving extractable text streams intact), our engine excises underlying text operators and reconstructs clean raster layers according to NSA SNAC sanitization principles.
Academic Reference: PoPETs 2022 (Chen et al.) & NSA Document Sanitization Guidelines
FAQ
Is the redaction truly permanent?
Yes, the underlying text and image data is permanently deleted from the PDF structure.
Can I redact images too?
Yes, both text regions and image areas can be permanently redacted.
Can I choose black or white cover?
Yes, pick the redaction style that suits your document.
Does this meet legal standards?
Our redaction removes data at the PDF object level, meeting court requirements.
Is this free?
Yes, always free.
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