Self-Signed Certificate Generator

Create custom self-signed SSL/TLS certificates for testing and development purposes with ease.

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About This Tool

This online tool allows you to generate self-signed SSL/TLS certificates quickly and securely. You can customize certificate details such as Common Name (CN), Organization, Country, validity period, and key size. Optionally, upload a Certificate Signing Request (CSR) to generate a certificate from it. The tool uses OpenSSL on the backend to create PEM-formatted certificate and private key files, which you can download for use in web servers, applications, or testing environments. It's ideal for developers, system administrators, and anyone needing temporary certificates for non-production use.

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How to Use

Fill in the certificate details like Common Name, Organization, and Country.
Select the key size (e.g., 2048 or 4096 bits) and set the validity period in days.
Optionally, upload a CSR file if you have one.
Click 'Generate Certificate' to create the self-signed certificate.
Download the generated certificate and private key files from the results page.

Frequently Asked Questions

Find Quick Answers

What is a self-signed certificate?

A self-signed certificate is an SSL/TLS certificate that is signed by its own creator, rather than a trusted Certificate Authority (CA). It's useful for testing, development, or internal networks but may trigger browser warnings in production.

Can I use this for production websites?

No, self-signed certificates are not recommended for production websites because they are not trusted by browsers and will cause security warnings. Use certificates from trusted CAs like Let's Encrypt for production.

What file formats are generated?

The tool generates PEM-formatted files for the certificate and private key, which are commonly used in web servers like Apache and Nginx.

Is my private key secure?

The private key is generated on our server and provided as a download. We do not store it permanently, but for maximum security, generate certificates locally in sensitive environments.

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