Encrypt a short message
Input
legacy-key hello world
Output
Base64 encrypted text
Useful for creating a simple RC4-encrypted sample.
Developer Tools
Review practical RC4 Encrypt examples so you can understand expected input, output, and common patterns faster.
Use this RC4 Encrypt tool to encrypt plain text with RC4 and return Base64 ciphertext. It is useful for legacy compatibility testing, reversible crypto demos, browser-side experiments, and understanding how passphrase-based RC4 transforms readable input into encrypted output.
Example pages are especially useful for developer tools because they show what good input looks like, what kind of output to expect, and how the tool behaves in common scenarios.
Input
legacy-key hello world
Output
Base64 encrypted text
Useful for creating a simple RC4-encrypted sample.
Input
demo-pass api_key=12345
Output
Base64 encrypted text
Useful when testing passphrase-based RC4 output on short strings.
Fix: Put the passphrase on the first line and the plaintext below it.
Fix: RC4 decryption requires the exact same passphrase.
Fix: Passphrase first, plaintext below.
Fix: RC4 is mainly useful for legacy compatibility, demos, and experiments.
Fix: This tool returns Base64 ciphertext.
After reviewing these examples, run the live tool with your own input. If your task involves a follow-up step, the related page can help you move to the next tool in the workflow.
Open the main RC4 Encrypt page and test your own real input.