Certificate Converter
Convert certificates between different formats: PEM, DER, PKCS#7/P7B, and PKCS#12/PFX
Input Certificate
Drop certificate file here or click to browse
Output Format
Supported Certificate Formats
Input Formats
- PEM Format: Base64 encoded with headers (-----BEGIN CERTIFICATE-----)
- DER Format: Binary ASN.1 encoded certificates
- PKCS#7/P7B: Certificate chains and bundles
- PKCS#12/PFX: Certificate and private key bundles
- Base64: Raw base64 encoded certificate data
Output Formats
- PEM: Text format for web servers (Apache, Nginx)
- DER: Binary format for Java applications
- PKCS#7: Certificate chains for Windows/IIS
- PKCS#12: Complete bundles for client authentication
- Base64: Raw base64 for embedding in code
Security Notice
All certificate conversions are performed locally in your browser and are never logged or stored.