Log File Anonymizer
Strip IP addresses, emails, API keys, and other personally identifiable information from your logs — without uploading anything.
How ZeroData protects your privacy
- ✓ No Uploads: Processing happens entirely via client-side JavaScript.
- ✓ No Storage: We do not have a database. We physically cannot save your data.
- ✓ No Tracking: We don't log what you process or track your inputs.
- ✓ Verifiable: Check your DevTools Network tab. You will see 0 outbound requests.
Why You Should Never Upload Server Logs
Server logs are some of the most sensitive artifacts in any organization. They contain IP addresses of your users, internal API endpoints, authentication tokens, database connection strings, and sometimes even plaintext passwords from failed login attempts.
When debugging production issues, engineers often need to share these logs with teammates, contractors, or in public bug trackers. Pasting raw logs into an online "anonymizer" that uploads your data to a server completely defeats the purpose of anonymization — you are handing your users' PII to a third party.
Our Log File Anonymizer uses a comprehensive set of regex patterns to detect and replace PII categories including IPv4/IPv6 addresses, email addresses, phone numbers, credit card numbers, AWS keys, Bearer tokens, and common api_key=... patterns. Every single match is processed inside your browser's JavaScript runtime with zero network requests.
Common Use Cases
- Sanitizing production logs before sharing with external contractors or support teams.
- Stripping IP addresses from Nginx/Apache access logs before publishing benchmarks.
- Removing API keys accidentally printed in application debug logs.
- Preparing server logs for bug reports in public GitHub issues without leaking user data.
- GDPR compliance — removing personal data from logs before archival.
Frequently Asked Questions
What kind of PII does this log anonymizer detect?
It detects and redacts IPv4 addresses, IPv6 addresses, email addresses, phone numbers, US Social Security Numbers, credit card numbers, AWS access keys, Bearer tokens, API key/secret patterns, and MAC addresses.
Is it safe to paste production server logs here?
Absolutely. The anonymization logic uses JavaScript regex patterns that execute entirely in your browser. We have no backend server for this tool, and your log data never leaves your machine.
Can I upload large log files?
Yes. Click the 'Upload Log File' button to load .log, .txt, .csv, or .json files directly. Since processing is local, there is no file size limit imposed by a server — it depends only on your browser's available memory.
What do the redacted values look like?
Each PII type is replaced with a descriptive tag like [REDACTED_IP], [REDACTED_EMAIL], or [REDACTED_AWS_KEY]. This makes it easy to search the anonymized output and understand what was removed.
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