Local utility · Last updated: 2026-06-10
PII Masking Tool Guide
Learn how to scrub sensitive emails, phone numbers, credentials, and custom patterns from logs locally before sharing.
Tool shortcut includedNo data uploadedRuns in browser
Short Answer: The PII Masking Tool scrubs sensitive emails, phone numbers, API keys, and custom regex patterns from text files locally in the browser, ensuring zero data transmission.
When to use this
Use this privacy-focused workflow when you need to share error logs, chat transcripts, database dumps, or emails with third-party APIs, AI models, or support desks, and must ensure no sensitive personal details are leaked.
Basic workflow
- Paste your text block or load a log file into the input area.
- Enable default toggles for email addresses, phone numbers, or credentials.
- Add optional custom phrases or regular expressions for domain-specific PII.
- Copy the masked, sanitized output to share safely.
Quality and safety notes
- Double-check custom log formats manually, as unique spacing or custom identifiers may bypass generic regex patterns.
- Verify that API keys or private certificates are fully replaced rather than partially exposed.
- Never trust a fully automated redaction system for regulated compliance (e.g. HIPAA or PCI) without secondary review.
Frequently Asked Questions
How does the PII Masker work?It runs local JavaScript regular expression matchers on the pasted text to find common patterns like emails and phone numbers, replacing them with redacted labels client-side.
Can it handle large server logs?Yes. Since processing runs locally in the browser, file parsing depends on your device CPU, meaning you can redact large files instantly without uploads.