IPv4 / IPv6 Address Anonymization & Masking Engine
Masks the final octet of IPv4 addresses (or last 80 bits of IPv6) for privacy-compliant log auditing.
Notice: engineering verification utility. Use test or de-identified data and verify results independently before relying on them.
How it works
Standard: GDPR Recital 39 / IP Masking Guidelines
Formula: IPv4 zeroing final octet (e.g. 192.168.1.xxx)
Checks: Valid IPv4 or IPv6 address string
Calculated locally in browser memory; nothing leaves your browser.
Deterministic local-first client-side execution. Provided as-is without warranty.