❌ Covering text
- Adds a shape on top of the text
- Text remains in the file data
- Copy-paste reveals original content
- Text extractor finds original content
- Removing the annotation layer exposes it
True content removal Make It Gone.
Make It Gone.
Not Just Hidden.
Drawing a black box over text in a PDF does not remove it — the words are still in the file. Expunge removes the content from the PDF data itself. A text extractor, a copy-paste, a hex viewer — none of them find anything, because there is nothing to find.
Redact a PDFHow Most PDF Redaction Actually Works — And Why It Fails
When you "redact" a PDF in most tools, here is what happens under the hood.
A rectangle is drawn over the text
The tool adds a filled shape — usually black — as an annotation layer on top of the page. Visually, it looks redacted.
The original text stays in the file
The underlying characters were never touched. They remain in the PDF's content data exactly as they were.
Anyone can remove the box and read the text
Disabling the annotation layer, copying text from the area, or running a text extractor will surface the original content. The redaction provides no real protection.
Quick test: Open any "redacted" PDF from another tool, try to select and copy text from a blacked-out area, then paste it into a text editor. If text appears, it was not redacted — just covered.
Content Removed From the File Itself
Expunge does not draw shapes over text. It rewrites the PDF so the text is no longer present.
✓ Expunge
- Rewrites the PDF content
- Text is not present in the file data
- Copy-paste finds nothing
- Text extractor finds nothing
- No annotation layer to remove
Three Ways to Mark Content for Removal
Expunge handles typed PDFs, scanned documents, and complex layouts.
Search and Redact
Type a word, phrase, or regular expression. Every matching instance across all pages is highlighted for review, then removed in one step.
Draw a Region
Draw a rectangle over any area of the page — text, images, signatures, stamps. Useful for documents where search-based detection is not precise enough.
OCR for Scanned Documents
For scanned PDFs where the text is stored as an image, Expunge's on-device text recognition finds the content so you can search and redact it normally.
Redact in Three Steps
No installation, no account, no upload.
Open Your PDF
Drag your file into Expunge or click to browse. The document loads locally — nothing is sent to any server at any point.
Mark What to Remove
Use search, draw over regions, or use OCR detection. Highlights show exactly what will be removed before you commit.
Download the Result
Apply redactions and download. The content is removed from the file data — not covered, not hidden, removed.
Questions About PDF Redaction
Why does copy-paste still reveal text after I "redacted" a PDF?
The tool you used likely drew a shape over the text without removing it from the file. The text is still present in the PDF data — the shape only hides it visually. To check: select text in a blacked-out area, copy it, and paste into a text editor. If text appears, the redaction was not applied to the file content.
What is the difference between covering text and redacting it?
Covering text adds a visual layer — a shape drawn on top of the page. The underlying characters remain in the file unchanged. Redaction modifies the file content itself, replacing the characters with blank space. After proper redaction, the text is simply not in the file.
Can redacted text be recovered from a PDF processed with Expunge?
After Expunge rewrites the PDF content, the original characters are not present in the file. There is nothing to extract because the data has been replaced, not obscured. Tools that only cover text are a different matter — those are reversible.
How do I verify the redaction worked?
Open the downloaded PDF, try to select and copy text from a redacted area, and paste it into a text editor. Nothing should appear. You can also run the PDF through a text extraction tool and search for the term you redacted — it will not be found.
Does Expunge work on scanned PDFs?
Yes. For scanned documents where text is stored as an image, Expunge includes on-device text recognition that can detect content and apply redactions to it. The recognition runs locally — no images are sent anywhere.
Have more questions? Read the FAQ