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Privacy guides

Understand document redaction, image metadata and the limits of automated checks. Start with the question your file raises.

Why black boxes on a PDF leak

A black rectangle may only change what a PDF displays while leaving text extractable. Understand covering versus removal, output checks and visual review.

PDF redaction (true delete) · Fake-redaction detector / PDF inspector

Strip GPS and camera data before you share photos

Phone photos embed GPS coordinates, capture time, and device model by default. Here's what that EXIF data reveals and how to remove it without losing quality.

Image EXIF / GPS removal · EXIF viewer

The redaction self-check before you share a sensitive file

Before sending a contract, medical record, financial statement, or ID scan, run this checklist to avoid fake redaction and metadata leaks.

PDF redaction (true delete) · Fake-redaction detector / PDF inspector · PDF metadata removal · Automatic PII detection

How to check whether a PDF is actually redacted

Combine text extraction, keyword searches, page review and metadata inspection to understand a PDF output's check coverage and remaining review needs.

Fake-redaction detector / PDF inspector · PDF redaction (true delete)

Adobe Redact and Sanitize: visible content and hidden information

Understand visible-content redaction and hidden-information removal in Acrobat, alongside the narrower metadata checks supported by PrivScrub.

PDF redaction (true delete) · PDF metadata removal · Fake-redaction detector / PDF inspector

Redact a screenshot before you share it — bug reports, order proofs, asking for help

Screenshots leak privacy you didn't notice: notification previews, browser tabs, account emails, shipping addresses. Mask locally before sharing — don't upload to a screenshot site.

Screenshot redaction · Blur / pixelate / black-out image regions · Image EXIF / GPS removal

Redaction by scenario: what to cover in contracts, medical records, and resumes

Different documents have different sensitive fields. This scenario-by-scenario checklist covers contracts, medical records, bank statements, and resumes — plus the corners people miss.

PDF redaction (true delete) · Automatic PII detection · PDF metadata removal

How Chinese national IDs and card numbers get detected in a document

ID numbers can use mod-11-2 and card numbers can use Luhn checks. Learn how structurally consistent candidate numbers are found and where errors remain.

Automatic PII detection · PDF redaction (true delete)

Why scanned PDFs are harder to redact than digital ones

Scanned images and extractable text need different checks. Understand OCR text layers, visual review and PrivScrub's no-OCR output scope.

PDF redaction (true delete) · Blur / pixelate / black-out image regions · Automatic PII detection