Online Tool Store
PII Masking Tool
Paste text and automatically detect and mask emails, phone numbers, SSNs, and credit card numbers with a before/after view, ready to copy or download. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Privacy workspace
Mask personal data in text
Before
After (masked)
Sample text is masked below.
How the PII Masking Tool works
- Paste the text containing customer records, support tickets, or logs.
- Choose which data types to detect and how matches should be masked.
- Compare the before and after panels, then copy or download the masked version.
FAQ
What kinds of data does it detect?
Email addresses, phone numbers in common US formats, US-style Social Security numbers, and 13-16 digit sequences that look like credit card numbers. Each type can be toggled off independently.
Will it catch every credit card or phone number?
No. It uses regular expression shapes, not the Luhn checksum or a phone number library, so unusual formats, spacing, or international numbers can slip through. Always review the "before" and "after" panels before sharing masked text.
Does the text ever leave my browser?
No. Detection and masking both run locally with JavaScript regular expressions — nothing is uploaded, which matters when the input itself is sensitive.
How we compare
| Feature | Online Tool Store | Manual find-and-replace | A cloud DLP service |
|---|---|---|---|
| Detects multiple PII types at once | ✓ | ✗ | ✓ |
| Text stays on your device | ✓ | ✓ | ✗ |
| Catches unusual or international formats | ✗ | ✗ | ✓ |
PII Masking Tool is a lightweight, pattern-based first pass — it catches the common shapes instantly and locally, but a compliance-critical dataset still deserves a proper DLP review.