A LITTLE HELP FOR YOUR NEXT TASK
RSA Message Encryption
Encrypt or unlock a short message with RSA-OAEP and supplied keys.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
Preparing local security workspace…
How to use RSA Message Encryption
- Choose Encrypt or Decrypt and provide the matching PEM key.
- Enter a short UTF-8 message or Base64 ciphertext.
- Encrypt or authenticate the decryption locally.
What are the limits of RSA Message Encryption?
RSA-OAEP with SHA-256 for short messages only. Maximum plaintext is key-size dependent. Not a replacement for authenticated bulk file encryption. No key recovery. This tool processes inputs in browser memory and makes no upload or lookup request. Clear inputs or close the tab when finished. Exports and clipboard actions are explicit.