CSR Content Verification
Display the contents of a CSR (Certificate Signing Request)
Features
Lists the key fields
Organizes the common name, organization, country, and more in a table
Adds plain-language labels to abbreviations
Displays CN as "Common Name" and similar readable labels
One-click value copy
Copy the value of each item with a single button
Supports old and new PEM formats
Parses CSRs with legacy-style headers as-is
How to use
Paste the CSR data
Paste a PEM-format CSR (the full text from BEGIN to END) into the input field
Run the parse with the Check button
On press, it is parsed in the browser and a results table broken down by item is shown
Review the contents of each field
Verify that each displayed item matches the intended application details
Use the sample and reset options
Use the sample button to see a working example, and the reset button to clear the input
Use cases
Pre-submission check for SSL certificates
Catch entry errors before submitting to the certificate authority and avoid the hassle of reissuing
Verifying settings when renewing a certificate
Compare and confirm that the renewal CSR was generated with the same organization details as before
Verification during a server migration
Quickly inspect the contents of a newly generated CSR on the destination to keep work moving smoothly
Confirming a CSR received from a client
Hosting providers can verify the details of a CSR entrusted to them by a client
Basics
What is CSR (Certificate Signing Request)?
A CSR is data submitted to a certificate authority to issue an SSL server certificate. It contains the server's public key and application information such as domain name and organization name.
Main CSR Fields
- CN (Common Name)：CN is the field where the domain name of the site using the certificate is entered. In modern certificates, SAN (Subject Alternative Name) is primarily used for hostname verification.
- O, OU (Organization Information)：O represents the formal name of the organization, and OU represents the department name. For business validation certificates, these must match the registered names.
- C (Country Code)：C is the field that represents the country where the organization is located using a 2-character country code. For Japanese organizations, JP is specified.
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
parsing the CSR 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 parsing results and input suggestions are not stored on the server.
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Updates
- update #216
Fixed issue where Japanese text was displayed on non-Japanese pages for some tools