What is the Redact PDF?
Redacting a PDF means permanently hiding sensitive information — names, ID numbers, signatures, account details — behind solid black boxes before the document is shared. It is a legal and professional necessity in countless situations: sharing a contract without exposing personal data, publishing a court document with identities protected, or sending a financial statement to an advisor without account numbers visible. A proper redaction is irreversible; once done, the hidden information cannot be recovered from the file.
This tool uses an honest, transparent method: visual redaction. Your PDF pages are rendered as images, you draw black rectangles over anything sensitive with your mouse or finger, and the final PDF is rebuilt from those images with the boxes permanently burned in. Because the original text layer is removed by rasterizing the pages, there is no hidden text lurking underneath the black boxes to be copied out — a common and dangerous failure of fake redactions that merely draw over selectable text.
Using it is deliberately simple. Upload the PDF, and each page appears as an image you can draw on directly — click and drag to place a black box, exactly like highlighting with a marker. An undo button removes the last box if you misplace one, and you can add as many boxes per page as you need. When every sensitive region is covered, one click rebuilds the PDF and downloads it, ready to share.
Visual redaction has one trade-off worth knowing: like compression, it converts pages to images, so text in the output is no longer selectable. For a redacted document destined for reading and archiving rather than editing, that is exactly what you want — it is part of what makes the redaction trustworthy. Keep your unredacted original in a safe place, and treat the redacted copy as the public version.
Everything runs locally in your browser, which matters enormously for redaction. Sending a sensitive document to a server-based tool defeats the purpose of redacting it — the unredacted original would pass through someone else's systems. Here the file never leaves your device at any point, there is no account, and closing the tab leaves nothing behind. Redact contracts, legal filings, medical records and financial documents with complete privacy. For documents with dozens of sensitive spots, work page by page and take short breaks — fatigue is the real enemy of thorough redaction. A second pair of eyes on the final file is the gold standard before it goes public.
How to use it
- Drop your PDF onto the tool — Drag and drop or click to choose the file. It renders locally — nothing is uploaded.
- Draw black boxes — Click and drag (or drag with your finger on touch screens) over any name, number, signature or detail to cover it with a solid black box.
- Undo mistakes — Misplaced a box? Click Undo last box to remove it, then draw again.
- Cover every page — Scroll through all rendered pages — redaction only works if every instance of sensitive data is boxed.
- Build the redacted PDF — Click Build redacted PDF. Pages are rebuilt as images with the boxes burned in permanently, and the file downloads.
Common use cases
- Blacking out ID numbers and signatures before sharing a contract
- Redacting names from legal documents before publication
- Hiding account numbers on bank statements sent to advisors
- Removing personal data from HR documents before archiving
- Censoring sensitive figures in reports shared publicly
Tips
- Double-check every page — one missed instance of data defeats the redaction
- Draw boxes slightly larger than the text to cover descenders and edges
- Use Undo freely; precise boxes look more professional than sloppy ones
- The output text is not selectable — that is by design and part of the security
- Keep the unredacted original stored safely and share only the redacted copy
- For very long PDFs, redact in batches within the page limit
Frequently asked questions
How do I black out text in a PDF permanently?
Upload the PDF, draw black boxes over the sensitive regions, and click Build redacted PDF. The tool rebuilds pages as images with the boxes burned in, so the hidden text cannot be recovered or copied from the file.
Is drawing a black box over PDF text real redaction?
Only if the underlying text is removed. Simply drawing over selectable text leaves it extractable. This tool rasterizes pages into images during the rebuild, removing the text layer — so the boxes are genuine, permanent redaction.
Can someone remove the black boxes from a redacted PDF?
Not from a file made with this tool. Because pages are rebuilt as flat images with the boxes baked in, there is no separate box layer to delete and no hidden text underneath.
Is it safe to redact confidential PDFs online?
With this tool, yes — redaction runs 100% in your browser and your file is never uploaded. Avoid server-based redaction tools for sensitive documents, since the unredacted original would pass through their systems.
Is it safe to redact confidential PDFs online?
Yes — redaction happens entirely in your browser, so your confidential document is never uploaded anywhere.
Can I redact a PDF without Adobe Acrobat?
Yes. Draw permanent black boxes over sensitive text for free — no Adobe needed.
Is it safe to redact confidential PDFs online?
Yes — redaction happens entirely in your browser, so your confidential document is never uploaded anywhere.
Can I redact a PDF without Adobe Acrobat?
Yes. Draw permanent black boxes over sensitive text for free — no Adobe needed.