Certificate Tool Decoded on the server using built-in .NET X.509 APIs

RSA / EC Key Inspector

Inspect an RSA or EC public/private key in PEM form and report the key type, size, and curve.

Key (PEM)

Paste a PEM-encoded RSA or EC public/private key, or upload a .key / .pem file.

Or upload a file (.pem .crt .cer .key .csr)

Result