Redact a PDF
Permanently black out sensitive text or images before sharing a PDF.
or drop a PDF here
- Stays on your device
- No sign-up
- No watermark
How to redact a PDF in 3 steps
- 1
Select PDF file
Click the button or drop the file. It is not uploaded.
- 2
Mark what to hide
It runs in this tab, on your device.
- 3
Download
Save the new file. Your original stays as it was.
Often used next
All 26 tools- Protect PDFAdd a password and set permissions to restrict printing, copying or editing.
- Add WatermarkStamp a text watermark across every page of a PDF.
- Compress PDFShrink a PDF to fit email and upload limits, with a level or target size.
- Merge PDFCombine multiple PDF files into a single document in seconds.
About this tool
Black out account numbers, names, or any sensitive content before sharing a PDF. Unlike a black rectangle drawn over the top, this tool rebuilds the page as an image so the covered content can't be recovered by removing a layer — and everything happens locally in your browser.
Limits and edge cases
- Because redacted pages are flattened to images, text on those pages is no longer selectable, searchable, or copyable — a deliberate trade-off for guaranteeing the covered content is actually gone.
- File size can increase after redaction, since flattened image pages are typically larger than the original vector text and graphics they replace.
- A password-protected PDF needs to be unlocked first, since rendering pages for redaction requires opening the file directly.
- Redaction boxes are rectangles you draw manually — there's no automatic detection of names, numbers, or other sensitive patterns, so reviewing every page yourself before finishing matters.
Before you send a redacted file, check these
- Every page with sensitive content has a box, not just the obvious one A name or account number often repeats in a header, footer, or a second reference later in the document: scroll every page, not just the first mention.
- Boxes fully cover the text or image, edge to edge A box that's a few pixels short can leave a sliver of a digit or letter visible once the page is flattened: err on the side of a slightly larger box.
- You're sharing the redacted download, not the original file It's an easy mix-up when both files sit in the same downloads folder: rename the redacted copy clearly before sending it.
- You checked whether the same information appears elsewhere in your files Redaction only changes this document. If the same sensitive detail lives in an email thread or another attachment, it's still exposed there.
Compared with tools that upload your file
iLovePDF, Smallpdf and PDF24 all offer this kind of job, and the online ones upload your file to their servers to do it. Here the work happens in this tab instead. Read the honest comparisons with iLovePDF, Smallpdf and PDF24, including where they are the better choice, or how to check that a tool does not upload.
Frequently asked questions
Is this different from just drawing a black box over text?+
Will the redacted PDF still have selectable text?+
Is my document uploaded to redact it?+
Can I undo a redaction box before finishing?+
Can I redact a PDF for free, including on a Mac?+
Related guides
Ready to start?
Free, no sign-up, nothing uploaded.