Cryptographic Format Limitations
When converting between formats, note that:
- JWK format can include metadata like key ID, usage, and algorithm
- PEM/SPKI format only contains the raw key material
- Converting to PEM/SPKI will not preserve JWK metadata
- Converting back to JWK will only include the key material
Convert Certificate Formats
Convert between different cryptographic certificate formats
Security Notice
The certificate conversion is performed entirely in your browser. No data is sent to any server. Please note that this tool is intended for development and testing purposes only. Always handle cryptographic material with care and follow security best practices.
About Certificate Formats
JWK (JSON Web Key)
A JSON-based format that can include metadata like key ID, usage, and algorithm. Ideal for web applications and APIs.
PEM (Privacy Enhanced Mail)
A base64-encoded format that contains the raw key material. Commonly used for certificates and private keys.
PKCS8
A format specifically designed for private keys, often used with PEM encoding. Provides secure private key storage.
X.509
A standard format for public key certificates. Used in SSL/TLS and other security protocols.