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RSA Encrypt & Decrypt

Encrypt with RSA public key, decrypt with private key — OAEP padding

Free Client-Side No Login No Storage
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RSA Key Pair Generator Generate RSA public & private key pairs — 1024, 2048, or 4096-bit AES Encryption Tool Encrypt text with AES-128, 192, or 256-bit keys — 100% client-side HMAC Generator Generate HMAC message authentication codes — SHA256, SHA512, SHA1, MD5

How to Use the RSA Encrypt & Decrypt

  1. Encrypt: Paste an RSA public key (PEM) and plaintext, then click Encrypt.
  2. Decrypt: Paste an RSA private key (PEM) and the Base64 ciphertext, then click Decrypt.

RSA encryption uses the Web Crypto API (RSA-OAEP with SHA-256). Maximum message size depends on key size (e.g., ~190 bytes for 2048-bit keys). Generate key pairs using the RSA Key Generator tool.