Convert PEM To CSR Online for Free


Note: 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 PEM file to other formats, check PEM Converter page.

Converting PEM to CSR online is easy using tool

Just follow these steps:

What is PEM format?

Privacy Enhanced Mail (PEM) serves as a file format designed for the storage of cryptographic data, functioning as a versatile container that accommodates the public certificate, private key, and root certificate. Initially developed for the Privacy Enhanced Mail (PEM) email encryption standard, the name PEM reflects its origin. Over time, PEM has expanded its utility to encompass various applications, such as securing websites, email encryption, and digital signatures.

Encoded in Base64, PEM files represent binary data in ASCII text, facilitating easy storage and transmission. These files adhere to a specific structure, featuring a header indicating the contained data type, followed by the data itself encoded in Base64. The conclusion of the data is marked by a footer.

Various software tools facilitate the creation of PEM files, and online tools are available to convert other file formats into the PEM format. Once a PEM file is generated, it can be employed to fortify a website or online application. Installation on the web server enables the file to encrypt and decrypt data transmitted between the server and the user's browser.

Beyond website security, PEM files find application in email encryption. Senders use the recipient's PEM file to encrypt an email message, and the recipient can subsequently decrypt the message using their own PEM file.

Overall, PEM files provide a secure and efficient means of storing and transmitting cryptographic information. Widely adopted, they play a crucial role in safeguarding websites, email communication, and other online applications.

What is CSR format?

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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