Step 1: Go to this website.

Step 2: Select ‘Check if a  CSR and a Certificate match’ 

Step 3:  

i. Open your certificate file  with notepad 

ii. Copy text. 

iii. Paste to ‘Enter your  certificate’ block 

Step 4:  

i. Open your CSR file with  notepad 

ii. Copy text. 

iii. Paste to ‘Enter CSR’ block 

Step 5: It will provide you match/mismatch result at the right side of the block. 


You can check whether a  certificate matches CSR on your own machine by using the OpenSSL commands  below:


openssl x509 -noout -modulus  -in certificate.crt | openssl md5
openssl req -noout -modulus -in CSR.csr | openssl md5 

Need more help? 

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