X.509 Certificate Inspector
Inspect one PEM or DER X.509 certificate locally. Read identity, issuer, validity, extensions and SHA-256 fingerprint, then export the observed report.
Inspect one PEM or DER X.509 certificate locally. Read identity, issuer, validity, extensions and SHA-256 fingerprint, then export the observed report.
- Prepare your input
Choose the relevant options using the controls below.
- Run your task
Adjust the controls below and inspect the preview.
- Use the result
Check the result, then use the available copy or download controls.
Inspect a certificate file
Reads one certificate locally and computes its SHA-256 fingerprint. Does not contact a server or verify signatures, trust chains, hostnames, revocation or compliance. Unknown field encodings remain hexadecimal in the report.
X.509 Certificate Inspector
Inspect one PEM, DER, CRT or CER certificate locally in the browser and export the observed report as JSON. Review the subject, issuer, serial number, validity dates, extensions and SHA-256 fingerprint. The file limit is 1 MB. This tool reads the supplied certificate; it does not contact a server or prove signature validity, trust-chain status, hostname coverage, revocation or compliance.
Features
- Paste PEM text or load one PEM, DER, CRT or CER file locally.
- Read subject, issuer, serial number, validity and certificate extensions.
- Compute and display the certificate’s SHA-256 fingerprint.
- Copy or download the observed certificate report as JSON.
How to use
- Paste a PEM certificate or upload one supported certificate file.
- Run the inspection and review identity, dates, extensions and fingerprint.
- Check the report against the certificate and your deployment context.
- Copy or download the observed JSON report for further review.