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PEM to JWK Key Converter

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PEM to JWK Converter

Convert RSA and EC PEM public/private keys to RFC 7517 JSON Web Key format client-side.
Last updated: July 7, 2026•100% Client-Side & Private
INPUTJSON
INPUT

Paste or type your data here, or click "Load Sample" to try an example.

orOpen Fileor Drag & Drop
OUTPUTJSON

Ready: PEM to JWK Converter

Convert RSA and EC PEM public/private keys to RFC 7517 JSON Web Key format client-side.

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About this Tool

Convert RSA and EC PEM certificates and public keys into RFC 7517 JSON Web Key format client-side.

What is a JSON Web Key (RFC 7517)?

A JSON Web Key (JWK) is a JSON object representing cryptographic keys. Widely used in OAuth 2.0, OpenID Connect (/.well-known/jwks.json), and JWT signature verification, JWKs express key parameters (n, e, kty, alg, use) in clean JSON.

Browser Native Web Crypto API

Uses the native browser window.crypto.subtle API to import SPKI / PKCS#8 key bytes and export structured JWKs without external dependencies.

Air-Gapped Cryptographic Security

Private keys and certificate chains are never sent over the network or logged anywhere.

Privacy Guarantee

The PEM to JWK Key Converter operates 100% locally in your web browser. Your inputs, configurations, and sensitive text payloads are processed entirely client-side using JavaScript and are never transmitted across the network or stored on any external servers.