Certificate Inspector

Inspect PEM certificates, fingerprints, names, and validity locally.

Algorithm

X.509 / SHA-256

Data

Input stays in this browser

Output

Local report only

Low risk

What Certificate Inspector does

local-first

Certificate Inspector parses PEM X.509 certificates locally, reports DER size, SHA-256 fingerprint, subject, issuer, and validity when those fields can be extracted. It is useful for TLS handoffs, certificate inventory notes, and quick fingerprint checks without remote lookups.