Redaction
PDF Redaction
The permanent removal of sensitive content from a PDF, replacing it with black bars or blank space.
Technical Detail
Redaction goes beyond visual concealment — it permanently removes the underlying text, images, and metadata from the PDF's content streams. Simple black rectangles drawn over text do not constitute proper redaction because the original data remains selectable and searchable. Professional redaction tools replace content with null bytes, update the cross-reference table, and optionally re-encrypt the document to prevent forensic recovery.
Example
```javascript
// Redaction: PDF manipulation example
import { PDFDocument } from 'pdf-lib';
const pdfDoc = await PDFDocument.load(fileBytes);
const pages = pdfDoc.getPages();
console.log(`Pages: ${pages.length}`);
```
Related Formats
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Merge PDF
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Split PDF
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Compress PDF
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Rotate PDF
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Add Page Numbers
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PDF to JPG
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Watermark PDF
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Reorder PDF Pages
F
Flatten PDF
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Edit PDF Metadata
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Sign PDF
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JPG to PDF
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Extract Text from PDF
D
Delete PDF Pages
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Reverse PDF
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Extract PDF Pages
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Resize PDF Pages
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Crop PDF
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Insert Blank Pages
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Duplicate PDF Pages
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Add Header & Footer
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Add Text to PDF
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Add Image to PDF