Free Online CSR Decoder - Decode & Verify SSL Certificate Requests
Use our free CSR Decoder to decode your Certificate Signing Request (CSR) and verify the information it contains before submitting it to a Certificate Authority (CA). This tool helps ensure your certificate details are correct.
✔ Free & instant ✔ Secure (runs in your browser) ✔ Verify CN, Organization, and Public Key details.
What is a CSR Decoder?
A CSR (Certificate Signing Request) Decoder is a tool that parses and displays the information contained within an encoded SSL certificate request. When you generate a CSR, the information you provide (such as your organization name, common name, and location) is encoded into a block of text (the CSR). Decoding it allows you to verify that all the details are accurate before you submit the request to a Certificate Authority (CA).
Why Should You Use a CSR Decoder?
Submitting a CSR with incorrect information can lead to several problems, including:
- Validation Delays: If the organization details don't match legal records, the CA may delay or reject your request.
- Incorrect Certificate: If the Common Name (CN) is wrong, the certificate will not work for your intended domain.
- Revocation and Reissue: Once a certificate is issued, correcting mistakes often requires a full revocation and reissue process.
Using our free online CSR Decoder helps you avoid these issues by providing a human-readable summary of your request instantly.
www.example.com or example.com). For Wildcard SSL, it must be *.example.com.
How to Use the CSR Decoder (Step-by-Step)
- Copy your CSR: Open your CSR file (typically ending in
.csr) or the text block you generated. Include the-----BEGIN CERTIFICATE REQUEST-----and-----END CERTIFICATE REQUEST-----lines. - Paste it into the tool: Use the text area above to paste your CSR.
- Click Decode CSR: Our tool will instantly parse the data and show you the details.
- Verify the details: Check the Common Name, Organization, Locality, and Country for any typos.
Frequently Asked Questions (FAQ)
Is it safe to paste my CSR here?
Yes. A CSR contains only public information and your public key. It does not contain your private key. Decoding it online is safe, but you should never share your private key.
What is the "Public Key Algorithm"?
The algorithm (e.g., RSA or EC) defines how the cryptographic keys are generated. RSA is the most common, while EC (Elliptic Curve) offers similar security with smaller key sizes.
Why is my CSR showing as invalid?
Ensure you have copied the entire block of text, including the BEGIN and END lines. Also, check for any accidental spaces added before or after the text.
Need to Buy an SSL Certificate?
Once you have verified your CSR, you are ready to secure your site. Browse our affordable SSL options: