SSL Certificate Converter

Convert SSL certificates to various formats

Features

Supports four certificate formats

Convert between PEM, DER, P7B, and PFX

Bundle intermediate certificates too

Add up to two intermediate certificates to build a certificate chain

Generate a PFX with a private key

Create a PFX file that bundles the private key and certificate

Conversion completes in the browser

Process entirely on your device without uploading files

How to use

Choose input and output formats

Specify the source and target from the input format and output format dropdowns

Select the certificate file

Select the certificate file, and add the private key or intermediate certificates as needed

Enter the PFX password

When PFX is involved, enter the encryption password in the password field

Press the convert button to run

Press the convert button to convert in the browser and generate the result

Download the converted result

Save the converted certificate file from the download button

Use cases

Install a certificate on a server

Convert to the PEM format required by Apache or Nginx and install it

Use in a Windows environment

Convert the certificate and private key into a bundled PFX format and install it on IIS

Apply to a Java environment

Convert the certificate to the DER format handled by the Java platform

Migrate to another server

Convert a certificate exported from the current server to the destination's format

Basic Knowledge

Difference Between PEM and DER

PEM is a text format certificate format that begins with "-----BEGIN CERTIFICATE-----" and is the most widely used. DER stores the same content in binary format and is mainly used in Java-based and Windows-based systems.

What is PFX (PKCS#12)?

PFX is a format that combines a certificate, private key, and intermediate certificate into a single file and protects it with a password. It is used for installation on IIS and for certificate portability and backup.