ngrok Reserved Subdomain TLS Renewal Question

Reserved Subdomain TLS Certificate Renewal Uncertainty After ngrok 3.0 Configuration Changes

25.5K reputation · 14 Aug 2025, 15:30 UTC

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The goal is to clarify whether ngrok automatically renews TLS certificates for reserved subdomains without requiring manual intervention.

Documentation for ngrok 3.x does not specify if background renewal occurs, and users have observed varying expiry dates in the dashboard, creating uncertainty about the reliability of reserved domains over time.

Does ngrok perform automatic TLS certificate renewal for reserved subdomains? If so, what is the renewal cadence and how can it be verified? If not, what is the recommended practice for maintaining valid certificates?

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Reserved Subdomain TLS Certificate Renewal Uncertainty After ngrok 3.0 Configuration Changes

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