🔐 Free SSL Certificate Generator
Generate self-signed SSL/TLS certificates instantly — perfect for development, staging, and internal services.
⚡ Generate Your Certificate Now →Why Use Our SSL Certificate Generator?
⚡ Instant Generation
Get your certificate and private key in seconds. No waiting, no queues, no email verification.
🔒 RSA 2048 / 4096
Choose between RSA 2048-bit (fast) or RSA 4096-bit (maximum security) key sizes.
📥 Download .crt + .key
Download both the certificate (cert.pem) and private key (key.pem) as PEM files with one click.
🕒 Flexible Validity
Choose 30 days to 10 years validity. Perfect for short-lived test certs or long-term dev environments.
🌍 Custom Domains
Set your own Common Name (CN), organization name, and country code. Your cert, your rules.
🔐 Private Generation
Everything runs on our server — your private key is generated fresh each time and never stored.
📋 When to Use Self-Signed Certificates
- ✅ Local Development — Test HTTPS locally before deploying to production
- ✅ Staging Environments — Secure your QA and staging servers without buying real certs
- ✅ Internal Services — Encrypt traffic between microservices in your VPC
- ✅ IoT Devices — Secure connections on devices that don't need public trust
- ✅ Learning & Testing — Understand how TLS and certificates work hands-on
How It Works
Domain name, optional org, country code
RSA key size (2048 or 4096), validity period
Get your .crt and .key files instantly
❓ Frequently Asked Questions
What is a self-signed SSL certificate?
A self-signed certificate is an SSL/TLS certificate signed by its own private key rather than a trusted Certificate Authority (CA). It provides the same encryption as a CA-signed certificate but won't be trusted by browsers automatically because no third party vouches for the identity.
Can I use a self-signed certificate in production?
Not recommended for public-facing websites. Browsers will show scary warnings. Use Let's Encrypt (free) or a commercial CA for production. Self-signed certs are great for development, staging, internal services, and learning.
What's the difference between RSA 2048 and 4096?
RSA 2048 is the standard, widely compatible, and fast. RSA 4096 offers stronger security (double the key size) but slower generation and slightly slower TLS handshakes. For most purposes, RSA 2048 is sufficient.
Is my private key safe?
Yes. The key is generated in memory, returned to you, and never stored on our servers. We don't log or persist any generated keys or certificates.
How do I install the certificate?
The .crt and .key files can be used with any web server: Apache (SSLCertificateFile/SSLCertificateKeyFile), Nginx (ssl_certificate/ssl_certificate_key), HAProxy, Node.js, Python, and more.
Ready to Generate Your SSL Certificate?
Free, instant, no signup. RSA 2048 or 4096 — your choice.
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