SSL PEM Viewer
Inspect a PEM block or OpenSSL text output for its format and selected certificate details. The viewer helps identify a file but does not validate the trust chain of a TLS connection.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
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How to use this tool
Paste a public certificate with its BEGIN and END boundaries, or an OpenSSL textual description. A private key is unnecessary, and the minimal ASN.1 scan may find only limited name information.
Results and examples
A BEGIN CERTIFICATE block can reveal its label and byte details. Finding a CN does not establish hostname matching, expiry validity, revocation status or a valid signature.
Limitations
- The tool is not a complete X.509 parser or a CA trust and revocation verifier.
- A minimal binary-name scan can miss data or identify the wrong occurrence.
Fields
| Field | Guidance and constraints |
|---|---|
| PEM or openssl x509 -text output | Check the unit and format displayed beside this field. |
| Details | Check the unit and format displayed beside this field. |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
What does a CERTIFICATE label establish?
A BEGIN CERTIFICATE block can reveal its label and byte details. Finding a CN does not establish hostname matching, expiry validity, revocation status or a valid signature.
Does a visible CN prove validity?
The tool is not a complete X.509 parser or a CA trust and revocation verifier. A minimal binary-name scan can miss data or identify the wrong occurrence.
