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How Redactorr Works

Understanding the technology behind browser-local redaction

Updated Jan 28, 20264 min readAuthor: Redactorr Support Team · [email protected]Last reviewed: March 2026

Your Browser as a Privacy Shield

Think of Redactorr as a private screening room for your documents. You bring a document in, it finds and replaces sensitive items with safe placeholders during browser-local detection and redaction.

Browser-Local Detection

Here is what makes Redactorr different: detection and redaction run in your browser.

When you paste text or open a file, detection, verification, and redaction run locally in your browser.

Original sensitive values stay local during detection and redaction.

How Detection Works

Pattern Screening**

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Redactorr scans your text for known sensitive formats — emails, phone numbers, credit card numbers, API keys, and more. Hundreds of detection patterns, running locally.

Validation**

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Finding a pattern is not enough. Each match is verified. Credit card numbers are checked against standard format rules. Emails are checked for valid domain structures. This validation step dramatically reduces false positives.

Context Analysis**

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Redactorr looks at the surrounding text. A number string in a test document means something different to the same string in a payroll report. Context helps determine what is actually sensitive.

Redaction**

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Once confirmed, sensitive data is replaced with a labelled placeholder like [EMAIL_1] or [TFN_1]. The same value always gets the same placeholder — so relationships in the document are preserved.

What Gets Detected

Personal identifiers

  • Email addresses
  • Australian and international phone numbers
  • Names and addresses

Australian government identifiers

  • Tax File Numbers (TFN)
  • Medicare numbers
  • ABNs, ACNs, BSBs
  • State-specific licence numbers

Financial data

  • Credit card numbers
  • Bank account numbers

Credentials

  • API keys (AWS, Stripe, GitHub, and many others)
  • Passwords in configuration files
  • Database connection strings

Industry-specific

  • Medical record numbers, patient identifiers
  • Legal matter references, AHPRA numbers
  • Construction licence numbers, site details

Custom patterns

  • Your organisation's internal ID formats
  • Internal codes and proprietary identifiers

Why This Matters

Traditional cloud-based redaction tools upload your file to a server, process it remotely, then send you back a result. Your sensitive data travels over the internet and sits on someone else's infrastructure.

Redactorr's approach: open the file in your browser, run detection and redaction locally, then choose what reviewed output moves to later workflows.

Privacy by Architecture

Redactorr's privacy is not a setting you toggle on — it is built into the architecture. Detection and redaction run inside a sandboxed environment in your browser. Optional Vault, sharing, and AI workflows use processed or reviewed redacted context when you choose.

After the app loads, browser-local detection and redaction can continue without connectivity.