سی ایس آر ڈی کوڈر
Decode and validate an SSL CSR to verify Common Name, organisation, key size and signature algorithm.
How to use this tool
- Copy your CSR. Include the BEGIN CERTIFICATE REQUEST and END CERTIFICATE REQUEST lines.
- Paste it in the box. Paste the whole Base64 block into the field below.
- Decode. Click Decode CSR to read the subject, key size and signature algorithm.
- Verify then submit. Confirm the Common Name matches your domain exactly, then submit it to your CA.
Free online CSR decoder
Before a Certificate Authority issues your SSL certificate it validates the details inside your Certificate Signing Request. A single typo in the Common Name means the issued certificate will not match your website and browsers will reject it. Decode your CSR here first to confirm every field is exactly right.
Security notes
- A CSR contains only your public key and identity details — it is safe to decode.
- Never share your private key (
-----BEGIN PRIVATE KEY-----) with any online tool. - Keep the matching private key on the server where the CSR was generated.
Frequently asked questions
What is a CSR?
A Certificate Signing Request is a Base64 block generated on your server that contains your public key and the identity details (domain, organisation, country) sent to a Certificate Authority.
How do I generate a CSR in cPanel?
In cPanel go to SSL/TLS, choose "Generate, view or delete SSL certificate signing requests", fill in your domain and organisation details and copy the generated block.
Why decode a CSR?
To verify the Common Name, organisation and key size are correct before you submit it to a CA — a typo means a wasted certificate order.
Is my CSR data sent anywhere?
No. The CSR is decoded on the QW HOSTING server in memory and is never stored, logged or shared.
What key size should I use?
RSA 2048-bit is the minimum accepted standard; 4096-bit offers stronger security with slightly higher CPU cost.