By Team Hypomnema · Cryptography & authentication
Decode a PEM certificate and inspect validity, names and fingerprints.
Use the guide alongside the working tool.
Open TLS Certificate Inspector →Working local example
Use Try sample in the tool to load a labeled demonstration.Decode a PEM certificate and inspect validity, names and fingerprints.
Prepare the right input
Paste an X.509 PEM certificate.
Inspect subject, issuer, validity and public-key metadata.
Review before using the result
Export the decoded public certificate details.
Local DER parsing only. Does not establish chain trust, revocation, hostname ownership or live TLS configuration. One certificate, up to 128 KB DER.
Privacy and trust boundaries
Inputs remain in this browser. No online reputation, account, DNS or remote key lookup is performed. A static inspection is not a security certification.
Use the sample to learn the workflow. Clear sensitive input after use; private exports and clipboard contents require careful handling.
Ready to apply this workflow?
Try TLS Certificate Inspector →Explore a related workflow
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- Public & Private Key Generator: workflow, verification and limits
Generate RSA or elliptic-curve keys locally with separate exports.
- Digital Signature Tool: workflow, verification and limits
Sign or verify exact message bytes with RSA or ECDSA keys.
Keep your original files and review the result. Found unclear instructions? Contact Team Hypomnema.