SSL/TLS Converter
Convert between certificate and key formats in your browser
All conversions happen locally using WebAssembly — your files and keys never leave your device
Input File
Drag & drop a file here, or click to browse
Supports: PEM, DER, PFX/P12, CRT, CER, KEY, CSR
Supported Conversions
| Input Format | Available Conversions |
|---|---|
| PEM Certificate | DER, PFX (with key) |
| DER Certificate | PEM, PFX (with key) |
| PEM CSR | DER |
| DER CSR | PEM |
| PFX / PKCS#12 | PEM chain |
| PEM Private Key | OpenSSH, PFX (with cert) |
| OpenSSH Private Key | PEM |
Privacy & Security
- All conversions occur in your browser using WebAssembly
- No files or keys are sent to any server
- Input buffers are wiped from memory after conversion
- Passwords are cleared from state after use
- Encrypted PEM keys are not supported — decrypt first with
openssl rsa -in encrypted.key -out decrypted.key