CSR Generation

About CSR Generation

Free CSR Generator – Create Certificate Signing Requests Instantly

What is a Certificate Signing Request (CSR)?

A Certificate Signing Request (CSR) is a coded file sent to a Certificate Authority (CA) for an SSL certificate. It has key info about the domain owner and the company. This includes the public key for the final certificate. CSRs are in PEM format and needed for SSL certificates.

Generate a CSR Online – No Installation Required

Our online CSR generator tool makes creating secure CSRs easy. You can do it right from your browser. No need for OpenSSL commands or server access.

Features of Our Free CSR Generator:

Secure and browser-based: No software download required.
Supports RSA 2048-bit and 4096-bit keys.
Generates both CSR and Private Key.
Compatible with all major Certificate Authorities.
Instant generation with copy/download options.

Required CSR Fields and Their Importance

When making a CSR, you need to fill out several fields. This makes sure the request is valid. Here's what each field is for:

Field	Description
Common Name (CN)	Fully qualified domain name (e.g., www.example.com).
Organization (O)	Legal name of your company or personal name for DV certs.
Organizational Unit (OU)	Department within the organization (optional).
City/Locality (L)	The city where your business is registered.
State/Province (ST)	The state or province of your organization.
Country (C)	Two-letter ISO code (e.g., US, GB).
Email Address	Administrative contact (optional in most cases).

Example Input:

Common Name: www.secure-example.com Organization: Secure Example Ltd. Organizational Unit: IT Department City: London State: Greater London Country: GB

CSR and Private Key Output Example

After filling out the form, you get two outputs:

? CSR Output:

-----BEGIN CERTIFICATE REQUEST----- MIICyzCCAbMCAQAwgYsxCzAJBgNVBAYTAlVTMQswCQYDVQQIDAJDQTEQMA4GA1UE ... -----END CERTIFICATE REQUEST-----

? Private Key Output:

-----BEGIN PRIVATE KEY----- MIIEvQIBADANBgkqhkiG9w0BAQEFAASC... -----END PRIVATE KEY-----

Note: Always keep your private key safe. Never share it with anyone.

CSR Generation Use Cases

? For SSL/TLS Certificate Installation

CSRs are the first step to get SSL certificates from trusted Certificate Authorities. Without a CSR, a CA can't issue a certificate for your domain.

? For Code Signing Certificates

Developers use CSRs for code signing certificates. This ensures software authenticity and integrity.

? For S/MIME Email Security

CSRs are used to get email security certificates. This lets you send and receive encrypted emails.

Advantages of Using Our Online CSR Generator

Benefit	Description
Simplicity	No command-line usage or OpenSSL required.
Speed	Instant key pair generation and CSR output.
Browser-Based Security	CSR is generated client-side; data is never sent to our servers.
Cross-Platform	Works on any device and operating system with a browser.

How to Use the Online CSR Generator – Step-by-Step

Fill in CSR fields: Enter domain and organization information.
Select Key Size: Choose between RSA 2048 or 4096 bits.
Click ‘Generate’: Instantly receive your CSR and Private Key.
Download or Copy Output: Save securely for certificate submission and server setup.

How a CSR Works in the SSL Certificate Process

sequenceDiagram participant User participant CSR Generator participant Certificate Authority participant Web Server User->>CSR Generator: Inputs domain and org details CSR Generator->>User: Returns CSR and Private Key User->>Certificate Authority: Submits CSR Certificate Authority->>User: Issues SSL Certificate User->>Web Server: Installs SSL Cert + Private Key

Frequently Asked Questions (FAQs)

What is a CSR used for?

A CSR is used to request a digital certificate from a Certificate Authority, typically for website security (SSL/TLS).

Can I reuse a CSR?

Technically yes, but it is recommended to generate a new CSR for each certificate to ensure key security.

Is it safe to generate a CSR online?

Yes, with our tool all generation happens in your browser. We do not store or transmit any data.

What key size should I choose?

RSA 2048 is standard and supported by all CAs. RSA 4096 offers enhanced security for high-trust environments.

Do I need to send my private key to the CA?

No. Never share your private key. Only submit the CSR.

Troubleshooting CSR Issues

Invalid CSR Format

Ensure the CSR begins with -----BEGIN CERTIFICATE REQUEST----- and ends correctly.

Mismatched Private Key and Certificate

Use the private key generated with the CSR used to obtain your certificate. Mismatches will cause installation errors.

Common Name Mismatch

Ensure the Common Name matches exactly the domain you want secured, including subdomains if necessary.

Export Options and Storage Tips

Always store the private key in a secure location such as a hardware token, password-protected vault, or secure server.
Download both the CSR and private key immediately after generation. Our tool does not store any data.
Do not edit CSR or private key content manually. Doing so may corrupt the file and invalidate the request.

Conclusion: Simplify Certificate Requests with Our Secure Online CSR Generator

Our free CSR generator offers a fast, secure, and user-friendly method to create valid Certificate Signing Requests with zero technical overhead. With support for strong encryption, browser-based generation, and full CA compatibility, our tool is ideal for professionals and organizations needing SSL certificates, code signing, or secure email solutions. Generate your CSR now and streamline your digital security workflow.