Tools

TOTP Drift Checker for Time Sync Issues

Compare server and client times to estimate TOTP drift.

TOTP Drift Checker

Measure time drift between systems to diagnose TOTP failures. This helps teams identify clock sync issues across devices and servers.

How to use the TOTP Drift Checker

  1. Enter the server and client timestamps.
  2. Click Check.
  3. Review the drift estimate.

Common use cases

  • Debugging failed TOTP logins.
  • Verifying time sync across devices.
  • Auditing authentication reliability.
  • Diagnosing issues in multi-region systems.

Tips & notes

  • Use NTP on servers for consistent time.
  • Small drifts can still cause user friction.
  • Confirm the timestamp units are correct.

Related security tools

  • JWT Expiry Risk Analyzer
  • OAuth Flow Visualizer
  • Token Entropy Analyzer

FAQ

What is drift?
The absolute time difference between server and client.
When is drift too high?
TOTP often tolerates only short drift windows.
Does this validate codes?
No. It only compares timestamps.