Data Anonymizer
Anonymize sensitive data by replacing PII patterns — emails, phones, SSNs, credit cards, IPs, and URLs — with redacted placeholders. Works on JSON, CSV, logs, or any plain text. 100% client-side and free.
How to Use Data Anonymizer
How to Use the Data Anonymizer
Step 1: Paste Your Data
Paste JSON, CSV, log output, or any free-form text containing sensitive information into the input field.
Step 2: Choose Replacement Style
- Placeholder — replaces PII with descriptive tags like
[EMAIL],[PHONE],[SSN] - Masked — replaces PII with asterisks that preserve the general shape, e.g.
****@****.***
Step 3: Select PII Types
Toggle which PII categories to detect and redact:
- Email — email addresses
- Credit Card — 16-digit card numbers with optional separators
- SSN — US Social Security numbers (NNN-NN-NNNN)
- Phone — US phone numbers in common formats
- IP Address — IPv4 addresses
- URL — HTTP/HTTPS links
Step 4: Copy or Download
The anonymized output appears in real time. Click Copy Result to copy to clipboard or Download to save as a .txt file.
Tips
- Load an example to see the tool in action before pasting your own data
- For sharing logs with support teams, use Placeholder style so field types remain clear
- For sharing datasets, Masked style preserves data shape while hiding actual values
- All processing runs in your browser — safe for data containing secrets or credentials
Frequently Asked Questions
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