How to automatically redact phone numbers from a pdf
- Step 1Upload the PDF with phone numbers — Drop the document into the PII redactor tool.
- Step 2Select Phone Number redaction type — Enable phone number detection.
- Step 3Review detected patterns — Confirm that the right matches are flagged before committing.
- Step 4Download the redacted PDF — Save the black-boxed output.
Frequently asked questions
What phone number formats are detected?+
UK formats (07xxx, +44), US formats (+1, (xxx) xxx-xxxx), and international E.164 formats are all detected. Regional custom formats may require manual redaction.
Can I add a custom pattern for internal phone extensions?+
Custom pattern support for short internal extension formats (e.g., ext. 1234) is on the Pro feature roadmap.
Are fax numbers detected alongside phone numbers?+
Yes — fax numbers follow the same format patterns and are detected and redacted along with phone numbers.
Privacy first
All PDF processing runs locally in your browser using PDF-lib and pdf.js. No file is ever uploaded — only metadata counters are saved for signed-in dashboard stats.