Black it out. For real.
Blackbar redacts PDFs by truly deleting the underlying content — and proves it. Everything runs in your browser: your files never leave your device.
Redact a PDFZero upload
All processing happens on your device. Unplug the network — it still works.
Zero friction
No account, no limits, no watermarks. Open and use.
Fast & clean
No ads, no popups, no redirects. Just the tool.
A black bar is not redaction
Most "redacted" PDFs just draw a black rectangle over the text. The text is still there — select, copy, paste, and it reappears. Court filings have leaked this way, repeatedly.
Blackbar deletes the content underneath. Redacted pages are rebuilt so the original text and images are simply gone from the file.
And it proves it: after export, Blackbar re-opens your file and shows that nothing extractable remains.
All tools
Redact
True redaction with auto-detect and proof
Check my PDF
Paste-test your “redacted” PDF
Merge
Combine files, drag to order
Split
Extract pages by range
Organize
Reorder, rotate, delete pages
Compress
Three presets, size comparison
Watermark
Diagonal watermark + page numbers
PDF → Images
Every page as PNG/JPG
Images → PDF
Photos and scans into one PDF
FAQ
Are my files really not uploaded?
Really. There is no server to upload to — this site is static files. Load the page once, then go offline (or install it as an app): everything keeps working.
Why do redacted pages become images?
Rebuilding the page as an image is how we guarantee the hidden content is gone. A page that keeps its text layer can leak it.
What does auto-detect find?
ID numbers, bank cards (with checksum validation), phone numbers, emails, SSNs. You review every suggestion before anything is blacked out — and you can always draw boxes yourself.