X.509 Certificate Inspector

Inspect PEM-encoded X.509 certificates, detect blocks, and compute SHA-256 / SHA-1 fingerprints.

PEM-encoded certificate(s)

Tool Help

What this certificate tool does

Paste one or more PEM-encoded X.509 certificates and this tool will:

Detect certificate, private key, and CSR blocks.
Decode the first certificate to DER and parse core X.509 fields.
Compute SHA-256 and SHA-1 fingerprints (OpenSSL style).

Healthcare / HIE context

TLS certificates for FHIR and HL7 APIs.
Mutual TLS between HIE gateways, EMRs, and integration engines.
Debugging cert chains when connecting to XDS / IHE registries, portals, and vendor APIs.

Fingerprints are often used when:

Pinning a certificate in config.
Verifying that a cert on disk matches what an endpoint is presenting.
Sharing "this exact cert" info with a vendor or security team.

This is a read-only inspection tool. It does not generate keys, create CSRs, or perform any cryptographic operations beyond hashing.

Published by: Joe Morrow on Nov 5, 2025

Need a hand? The Interops Team supports providers & payers across HL7 v2, C-CDA, FHIR, TEFCA, and HIPAA. Use the left sidebar (☰ on mobile) to browse topics, and switch Light/Dark from the header. Questions or ideas? or send an email: joe.morrow@interopsteam.com.

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