Convert your SSL certificates from CER to CSR effortlessly with certificatetool.com converter. Just upload your certificate file, choose your new format, and click convert. Done!
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Certificatetool.com offers online and free SSL certificate format conversion tool without needing any software installation or running the OpenSSL commands. If you would like to convert your CER file to other formats, check CER Converter page.
Just follow these steps:
A .cer file functions as a Secure Sockets Layer (SSL) certificate file, crucial for securing communication between web servers and web browsers. SSL certificates achieve this by encrypting transmitted data, thwarting eavesdroppers from intercepting and deciphering sensitive information.
SSL certificates are broadly categorized into server certificates and client certificates. Web servers utilize server certificates to authenticate themselves to web browsers, while client certificates enable web browsers to authenticate themselves to web servers. While .cer files are primarily associated with server certificates, they can also be employed for client certificates.
To utilize a .cer file, installation on the respective web server or web browser is necessary, with installation procedures varying depending on the software in use. Once installed, the .cer file becomes instrumental in verifying the identity of the counterpart before establishing a secure connection.
For web browsers, the validity of the .cer file can be confirmed by checking the lock icon in the address bar; a green lock icon signifies a valid certificate and a secure connection. On the other hand, web servers can verify .cer file validity by examining error logs, where the absence of errors indicates a valid certificate, signaling the server's readiness to accept connections.
A Certificate Signing Request (CSR) is a coded text block forwarded to a Certificate Authority (CA) during the SSL Certificate application process. Typically generated on the server where the certificate is to be installed, the CSR includes pertinent details for incorporation into the certificate, such as the organization name, common name (domain name), locality, and country. While the PKCS #10 specification is the most prevalent format for CSRs, various other formats are also compatible.
The CSR, crafted in the PEM format, encompasses the public key section of the private key and details about the entity (individual or company). Included in the CSR are the two-letter country code, state/province, and city where the company is legally situated.
After generating the CSR, the next step involves submitting it to the CA alongside payment for the SSL Certificate. The CA then processes the request, issuing a digital certificate in return. This certificate file holds the public key of the website and its identity, along with related information. Installation of the digital certificate on the website is imperative to activate HTTPS.
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