Convert JWK to PEM

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About this conversion

Convert a public JSON Web Key or a JWKS (RSA, EC, Ed25519) to PEM public keys. This converter processes your JWK / JWKS file server-side and returns a PEM public key file instantly — no account, no software installation, and no file storage. Files are deleted from our servers immediately after conversion.

Learn more: PEM / DER / CER / CRT file format explained

How to convert JWK / JWKS to PEM public key

1. 1. Upload — drag your JWK / JWKS file onto the converter above, or click to browse.
2. 2. Convert — press Convert. Processing happens on secure servers in seconds.
3. 3. Download — your PEM public key file downloads automatically. No sign-up required.

Convert JWK / JWKS to PEM public key from the command line

curl --fail-with-body \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -F "file=@input.json" \
  -F "conversionId=jwk-to-pem" \
  https://www.omniconvert.cloud/api/convert -o output.pem

The API needs a token from a credit pack, and each API conversion uses one credit. Converting on this page stays free. API documentation