Certificate Format Converter

Convert certificates between PEM, DER, and Base64 formats. Auto-detects the input format.

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Drag & drop a file here, or click to browse

Supports .pem, .cer, .crt, .der, .csr, .p7b, .pfx, .p12

This tool runs entirely in your browser. No data is sent to any server, collected, or stored. Your input never leaves your device.