Redact PDF Online — 100% Free & Private
Auto-detect sensitive data (emails, phones, IBANs, SSN) and permanently black out confidential text directly in your browser. Zero server uploads, zero logins, and 0% text leak guarantee.
Drag and drop your PDF here to Redact & Analyze
Redact & Analyze PDF
or browse your computer
Scanning PDF for sensitive data...
Reading document bytes...
Scanned PDF Detected
This document consists of scanned images without a selectable text layer. You can continue directly to manual blackout redaction, or run in-browser OCR to detect text locally.
Document Loaded
How to Redact PDF Online Without Adobe Acrobat (100% Free)
Adobe Acrobat Pro charges upwards of $20 to $30 per month just to access basic redaction. Meanwhile, most online converters force you to upload confidential client contracts, bank statements, or tax files to unknown cloud servers where data can be intercepted or cached.
Drop Your PDF
Drag your document into Redact PDF Online. The file is parsed exclusively in your browser RAM using WebAssembly. Zero bytes ever leave your device.
Auto-Detect Sensitive PII
Our client engine automatically flags emails, phone numbers, IBANs, and national IDs. You can also type custom keywords or draw blackout boxes anywhere.
Download Sanitized PDF
Click "Apply Blackout & Download" to generate a secure PDF with permanent raster burn-in, guaranteeing zero hidden text leaks.
Many basic online editors only draw an opaque visual rectangle over text without deleting the underlying character stream. If a recipient opens that file and hits Ctrl + A or extracts the text using software, the confidential data behind the black box can still be copied and exposed.
Redact PDF Online solves this with **True Permanent Redaction**: redacted pages are rasterized onto an offscreen canvas at high-DPI resolution (200+ DPI print quality) with the blackout boxes burned directly into the pixel buffer. The original text vectors on redacted pages are completely destroyed, making text extraction mathematically impossible.
Complete Document Inspection & Word Counting
Beyond redaction, this tool is also a full-featured structural PDF analyzer. Powered by Mozilla's PDF.js engine, it parses character coordinates and generates comprehensive text analytics:
Word & Page Counts
Accurate word count, total pages, character counts (with and without spaces), and average density per page.
Page-by-Page Table
Detailed breakdown of word count, sentences, and estimated reading time for each individual page in the document.
Keyword Frequency & Finder
Instant search for custom keywords with exact occurrence counts, plus top 10 most frequent vocabulary terms.
Metadata & PDF Specs
Inspect PDF author, software creator, creation timestamp, PDF version, and modification details.
Frequently Asked Questions
How do I black out text in a PDF for free?
Drag your PDF into the upload box above. Our auto-scanner will immediately find emails and phone numbers. If you have custom names or numbers to conceal, type them into the Custom Keyword input and click "Apply Blackout & Download".
Can I redact a PDF without Adobe Acrobat Pro?
Yes! This tool provides 100% free PDF redaction without requiring an Adobe subscription, trial credit card, or account signup.
Does my sensitive document get uploaded to any server?
No. Unlike Smallpdf or iLovePDF which process documents on their remote cloud servers, this tool executes 100% locally in your web browser. You can even disconnect your internet after loading the page and it will still work!
What if something sensitive is not auto-detected?
Use the "Custom Keyword Blackout" box on the right. Simply type the custom name, client tag, or dollar amount, and the tool will locate and mark all occurrences across every page for permanent blackout.
What if a false positive is detected?
Every auto-detected item appears in a checklist. If an email or number shouldn't be redacted, simply uncheck its checkbox before clicking "Apply Blackout".
Can I still count words and check page stats?
Yes! All existing document analytics — including word count, reading duration, page-by-page table, vocabulary density, and metadata — are available in the "Page-by-Page" and "Text Analytics" tabs.