Key pair generator

Key Pair Generator

Make a key pair for signing JWTs, encrypting data or logging in over SSH, in the formats you need, without installing OpenSSL. The keys are made with your browser's WebCrypto and never sent anywhere.

How do I use the Key pair generator?

1. Pick the key type and what it's for.
2. Press Run to make a pair.
3. Copy the public key where it's needed and keep the private key safe.

What does the Key pair generator do?

• RSA 2048, 3072 and 4096; ECDSA P-256 and P-384; Ed25519
• PEM: SPKI public and PKCS#8 private
• JWK with alg, use and the RFC 7638 thumbprint as kid
• A JWKS ready for /.well-known/jwks.json
• SSH public key for authorized_keys
• Ed25519 private key in OpenSSH format for ssh -i

Frequently asked questions

Is it safe to make keys in a browser?

The keys come from WebCrypto, the same code the browser uses for HTTPS, and they stay on your device: nothing is uploaded or saved. For keys that guard production systems, many teams still prefer making them on the machine that uses them.

Is my data uploaded?

No. Bracely runs entirely in your browser, so nothing you paste or open leaves your device.

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Runs entirely in your browser. Nothing you paste is uploaded. Made by Saurabh Pagrut. About · Privacy policy
Last updated 22 October 2026 · Version 4.9 · Changelog
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