SSL Certificate Details Viewer
Display the contents of an SSL certificate
Features
Parse certificates in the browser
Load a PEM-format certificate and list its main fields
Covers the main fields
Extract and display 16 items such as the issuer, validity period, and SAN
Automatically compute fingerprints
Generate and display the SHA-1 and SHA-256 fingerprints
Copy each field individually
Copy each value individually with one click from the button next to it
How to use
Paste in the certificate
Paste the SSL certificate you want to check into the input field in PEM format
Parse with the check button
Press the check button to instantly parse the certificate in the browser
Review the parsed result in a list
Review and copy each item such as the common name and validity period in a list
Use cases
Inspect the validity period in advance
Check the validity end date to prevent missed renewals of server certificates
Confirm the certificate's issuance details
Verify it is the intended certificate from the issuer and common name
Confirm the covered domains
List the SAN to grasp the range of domains the certificate covers
Match identity via fingerprint
Compare fingerprints to confirm the identity of a distributed certificate
Basic Knowledge
Issuer and Subject
The Subject of a certificate indicates "whose certificate it is" (a site's domain or organization), while the Issuer indicates "who issued it" (a certificate authority). In a self-signed certificate, these two values are the same.
What is a Fingerprint
A fingerprint is a hash value calculated from the entire certificate, allowing you to verify whether two certificates are identical by comparing only the short hash values. It is used to confirm certificate mismatches and to identify certificates when making inquiries.
Safety and privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
SSL certificate parsing is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the certificate content and input suggestions are not stored on the server.
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