Security Tools
RSA Key Generator
Generate 2048-bit or 4096-bit RSA key pairs in PEM format using the Web Crypto API — runs 100% in your browser
Trusted by 10k+ developers
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How it works
- • Uses the Web Crypto API (
crypto.subtle.generateKey) — runs 100% in your browser, no data sent to any server. - • Generates RSA-PKCS#1-v1_5 / SHA-256 key pairs exported as SPKI (public) and PKCS#8 (private) PEM format.
- • 2048-bit is standard for most uses; 4096-bit provides higher security but is slower to generate.
- • Compatible with OpenSSL, SSH, TLS, JWT (RS256), and most cryptographic libraries.
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