upsonar.io

Free SSL Certificate Monitoring

upsonar.io monitors your SSL/TLS certificates and alerts you before they expire. Validates certificate chains, checks TLS protocol versions, and verifies issuer trust — automatically, every day.

Alerts at 30, 14, 7 days before expiry · Chain validation · Free plan available

Why SSL Monitoring Matters

Browser Warnings

Expired SSL = full-page security warning. Most visitors leave immediately. Your site is effectively offline.

Silent Renewal Failures

Auto-renewal fails silently due to DNS changes, firewall rules, or expired payment methods. Independent monitoring catches this.

30-Day Early Warning

Get alerts at 30, 14, and 7 days before expiry. Plenty of time to renew or fix auto-renewal issues.

What We Check

Certificate Validity — Is the certificate trusted by browsers and not revoked?
Expiration Date — Exact expiry date and days remaining. Alerts at 30, 14, 7 days.
Certificate Chain — Complete chain validation — root, intermediate, and leaf certificates.
TLS Protocol Version — TLS 1.2, 1.3 support. Detects deprecated protocols.
Issuer Details — Certificate Authority name, organization, and trust status.
Domain Match — Certificate covers the correct domain and subdomains (SAN/wildcard).

Check Your SSL Certificate Now

Free instant SSL check — validity, expiry, chain, TLS version. No signup required.

Related

Domain MonitoringWebsite MonitoringFree SSL Expiry CheckerSSL Monitoring Setup Guide

Frequently Asked Questions

Never Miss an SSL Expiry Again

Free plan includes SSL monitoring for 3 websites with email and Telegram alerts. No credit card required.

Set up in 30 seconds · Free forever

Last updated: February 2026