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Certificate Center

Certificate tool

CSR parser

The CSR Parser decodes a specified Certificate Signing Request (CSR) and displays its detailed information. You can parse a CSR by manually entering its text or by uploading the CSR file. The parsed information includes key details such as the domain name, company information, encryption algorithm, signature algorithm, and Public Key.

tip

You can use all certificate tools from the Certificate Center for free without logging in to a VolcanoEngine account.

Application scenarios

Use this tool if you have a Certificate Signing Request (CSR) file and want to confirm its application information (e.g., domain name, company information, encryption algorithm, etc.) is correct before submitting it to a Certificate Authority (CA). This tool decodes a CSR and clearly displays all related information.

Procedure

Go to the CSR Parser.

Select one of the following methods based on your CSR file format:

Manual input

For Input Method, select Manual input.

Paste your CSR content into the text box and click Parse CSR.

File upload

For Input Method, select File upload.

Select the CSR file to upload and click Parse CSR.

Click the add button in the CSR upload area to select a file, or drag and drop a file into the area.

Only PEM-encoded CSR files are supported. The file extension is .csr or .pem.

In the CSR Parse Results section, you can view the following information from the CSR:

Common Name (CN): the root domain or IP address that the certificate is attached to.

Subject Alternative Name (SAN): lists all the domain names that the certificate is intended to secure.

Organization Information:

Organization (O)

Organizational Unit (OU)

Country (C)

State or Province (ST)

Locality (L)

Address (Street)

Postal code

Algorithm information:

Encryption algorithm

Signature algorithm

Public Key

Last updated: 2026.04.01 10:51:37