ToolAdda

Developer Tools • SSH Key Conversion

Convert PEM to PPK Online for PuTTY

Use this free PEM to PPK converter to transform OpenSSH private keys into PuTTY-compatible PPK files in seconds. The conversion runs locally in your browser, so your private key stays secure and never leaves your device.

SSH Key Converter

Paste your PEM private key and convert it to PPK format for PuTTY.

⚡ Fast conversion Paste a PEM key and get a downloadable PPK file instantly.
🔒 Private by design All conversion happens client-side, keeping your key safe.
🧩 PuTTY ready Perfect for Windows users who need SSH access with PuTTY.

Why convert PEM to PPK?

Many Linux and macOS setups generate OpenSSH keys in PEM format, while PuTTY on Windows expects PPK. This tool makes the switch simple and safe.

  • Supports standard PEM private key formats.
  • Creates a PuTTY-compatible file for Windows login workflows.
  • Ideal for developers, sysadmins, and cloud teams.

How to use this tool

  1. Paste your PEM private key or upload a .pem/.key file.
  2. Click “Convert to PPK” to generate the compatible output.
  3. Download the PPK file and use it in PuTTY instantly.

Frequently asked questions

What is PEM?

PEM is a common OpenSSH private key format used on Unix-based systems and many cloud platforms.

Why do I need PPK?

PuTTY on Windows uses PPK files for SSH authentication, so converting your key makes it compatible with that workflow.

Is my key safe?

Yes. Conversion happens directly in your browser, which means your key is never uploaded to a server.