Certificate Chain Viewer
Drop a chain bundle (concatenated PEM blocks) and see each certificate summarised — subject, issuer, validity, signature algorithm — with explicit checks that each cert’s issuer DN matches the next cert’s subject DN. Useful for diagnosing “invalid certificate chain” errors.
Input
Result
Paste, drop, or pick a file.
All parsing runs locally.
Reading a chain
Convention: leaf first, then any intermediates, then the root last. Each cert’s Issuer must equal the next cert’s Subject. The root is self-signed (subject = issuer). This tool verifies the linkage by name only — actual signature verification is left to your TLS stack, which is the right place for it.
Spec
RFC 5280, §6 (Certification Path Validation).