PEM / XML Key Converter

Convert RSA keys between PEM (OpenSSL) and XML (C#/.NET) formats.

Input Key (PEM or XML)

Automatically detects format. Supports Public and Private keys.

About Key Formats

Different programming languages and platforms use different formats to store RSA keys.

PEM (Privacy Enhanced Mail): The standard format for OpenSSL, Linux, PHP, Node.js, and many others. It usually starts with -----BEGIN PUBLIC KEY----- or -----BEGIN RSA PRIVATE KEY-----.
XML (Extensible Markup Language): The standard format used by Microsoft .NET framework (C#, VB.NET). It uses tags like <RSAKeyValue>, <Modulus>, and <Exponent>.

This tool allows you to easily convert keys between these two common formats without sending your private keys to a server.