SSL/TLS Certificate Chain Checker
Inspect a public host's live certificate, SANs, validity, negotiated TLS, and presented chain.
Enter a public hostname. CodeAva connects to port 443 with SNI and returns a sanitised certificate summary.
The hostname is sent to CodeAva for a live port-443 connection. Private/reserved targets are blocked. A single vantage point cannot prove global availability or every client trust store.
The hostname is sent to CodeAva for a live port-443 TLS connection. Private and reserved targets are blocked and certificate details are returned without storing a report.
Overview
Fetch a public host certificate and inspect hostname matching, validity, issuer chain, SANs, trust errors, protocol, and cipher.
Start with one of the included examples, inspect every finding, and verify consequential changes against the linked primary documentation and your own environment.
Use cases
When to use it
- Example 1.Inspect a public HTTPS host for expiry, not-before date, SAN coverage, issuer details, and chain order.
- Example 2.Differentiate hostname mismatches, missing intermediates, expired certificates, and runtime trust-store failures.
When it's not enough
- Production guarantees.A point-in-time tool result cannot prove every runtime, resolver, client, or edge location behaves the same way.
- Blind automation.Review generated output and findings before committing configuration or security changes.
How to use it
- 1
Load or paste a representative input
Inspect a public HTTPS host for expiry, not-before date, SAN coverage, issuer details, and chain order.
- 2
Run the focused checks
Read the exact path, record, operation, or certificate field attached to each finding.
- 3
Verify and apply
Use TLS certificate chain error guide and the related tools to confirm the fix before release.
Common errors and fixes
The input is incomplete or malformed
Reduce it to the smallest reproducible sample, correct the parse error, and rerun the check.
The tool passes but production still fails
Compare environment-specific inputs, network vantage points, versions, caches, and full standards conformance.