SSL Converter

Certificate File to Convert

Private Key File

Chain Certificate File (optional)

Chain Certificate File 2 (optional)

Type of Current Certificate Standard PEM DER/Binary PFX/PKCS#12 Detected type from file extension

Type To Convert To Standard PEM DER/Binary PFX/PKCS#12

PFX Password

Convert Certificate

About SSL Converter

SSL Converter – Convert SSL Certificates to PEM, DER, PFX & More

Universal SSL Certificate Converter Tool

The SSL Converter is a powerful tool for changing SSL certificate formats easily. It works with all major formats like PEM, DER, PFX (PKCS#12), and PKCS#7. This makes it perfect for use on many servers and platforms, including Apache, Nginx, IIS, Tomcat, and Java.

With this tool, changing certificate formats is quick and safe. You can do this for installation, renewal, or to work on different platforms. All without using complicated command-line tools.

Supported SSL Certificate Conversions

Our SSL Converter can change formats in both directions:

From Format	To PEM	To DER	To PFX (.p12)	To PKCS#7 (.p7b)
PEM (.crt/.cer/.key)	✅	✅	✅	✅
DER (.der/.cer)	✅	✅	✅	✅
PFX (.p12)	✅	✅	✅	✅
PKCS#7 (.p7b)	✅	✅	✅	✅

SSL Format Descriptions

Format	Description	Common Use
PEM	Base64-encoded, used widely in Unix/Linux systems	Apache, NGINX, cPanel
DER	Binary format, mostly used in Java environments	Java keystores
PFX (PKCS#12)	Binary format with cert + private key + chain	Windows servers, IIS
PKCS#7 (P7B)	Certificate chain without private key	Microsoft environments, Tomcat

How to Use the SSL Certificate Converter

1. Upload Your Certificate in the original format (PEM, DER, PFX, or P7B).

2. Select Output Format (e.g., PEM to PFX, DER to PEM, etc.).

3. Click “Convert” to receive the converted certificate files.

4. Download the converted certificate and/or key file for installation.

Convert SSL Certificates Online in Seconds

No installation, no data collection—our SSL converter works right in your browser. It's perfect for moving servers, setting up new platforms, or renewing certificates. This tool makes SSL certificate changes easy and hassle-free.

Common Use Cases for SSL Conversion

? PEM to PFX for IIS

Convert PEM certificates for use on Windows IIS servers. They need .pfx format with both certificate and private key.

? PFX to PEM for Apache

Extract the private key and certificate from a .pfx container. This is for use in Apache or NGINX servers.

☁️ DER to PEM for Cloud Deployment

Convert Java-style DER files into PEM. This is for use on most Linux-based cloud servers.

? PEM to PKCS#7 for Intermediate Chains

Create a full certificate chain file in .p7b for applications that require it, like on Windows.

Diagram: SSL Conversion Flow

mermaid

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graph TD A[PEM] --> B[PFX] A --> C[DER] A --> D[PKCS#7] B --> A C --> A D --> A

OpenSSL Command-Line Equivalents (For Reference)

If you prefer to work locally with OpenSSL, here are some example commands:

? Convert PEM to PFX

bash

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openssl pkcs12 -export -out certificate.pfx -inkey private.key -in certificate.crt -certfile CA-bundle.crt

? Convert DER to PEM

bash

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openssl x509 -inform der -in certificate.der -out certificate.pem

? Extract Private Key from PFX

bash

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openssl pkcs12 -in certificate.pfx -nocerts -out private.key

Frequently Asked Questions

? Is the SSL converter safe to use?

Yes. All operations are done locally in your browser. Your certificate and private key stay on your device.

? What file types can I upload?

The tool accepts .crt, .cer, .der, .pem, .p7b, .pfx, .p12, and .key files.

? Can I convert multi-file certificates?

Yes. You can combine split certificate chains in a text editor before converting.

? Does this tool support ECC and RSA certificates?

Yes. The SSL converter supports both ECC and RSA certificates in all formats.

Security Best Practices When Handling SSL Certificates

• Never share private keys publicly or by email.

• Always use secure methods for transferring converted files (e.g., SFTP).

• Backup original keys before conversion.

• Limit access to certificates and keys on your servers.

Conclusion – Convert Certificates with Confidence

Our SSL Converter is fast, secure, and easy to use. It helps you convert SSL certificates between formats. It's perfect for setting up SSL on new servers, switching platforms, or deploying to different environments. This tool makes sure your certificates are compatible and ready for secure use.