Convert PEM to JWK
Convert a PEM public key or certificate to a JSON Web Key with a SHA-256 key ID
Drop a file or click to browse
Accepted: .pem,.pub,.crt
Free and unlimited for files up to 5 MB. No account needed.
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About this conversion
Convert a PEM public key or certificate to a JSON Web Key with a SHA-256 key ID. This converter processes your PEM public key file server-side and returns a JWK 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 PEM public key to JWK
- 1. Upload — drag your PEM public key file onto the converter above, or click to browse.
- 2. Convert — press Convert. Processing happens on secure servers in seconds.
- 3. Download — your JWK file downloads automatically. No sign-up required.
Convert PEM public key to JWK from the command line
curl --fail-with-body \
-H "Authorization: Bearer YOUR_TOKEN" \
-F "file=@input.pem" \
-F "conversionId=pem-to-jwk" \
https://www.omniconvert.cloud/api/convert -o output.jsonThe API needs a token from a credit pack, and each API conversion uses one credit. Converting on this page stays free. API documentation
Frequently Asked Questions
- Can I upload a certificate instead of a public key?
- Yes. For a PEM certificate, the public key inside it is converted. Private keys are refused, because they should never be uploaded to an online tool.
- How is the "kid" chosen?
- It is the base64url SHA-256 hash of the key in DER (SubjectPublicKeyInfo) form, so the same key always gets the same ID. Replace it if your system expects a different key ID.
- How do I convert PEM public key to JWK?
- Upload your PEM public key file above, click Convert, and download the JWK result instantly. No account or software needed.
- Is converting PEM public key to JWK free?
- Yes. It is free and unlimited for files up to 5 MB, with no account required. Larger files get 3 free conversions per day; beyond that, credit packs start at $3 and credits never expire.
- Are my files stored or shared?
- No. Files are processed in server memory and deleted immediately after conversion. File contents are never written to disk or retained.
- Do I need to install anything?
- No software installation needed. OmniConvert runs in the browser — just upload, convert, and download.
No account needed · Credits never expire · Share your token link across devices