RC4 Stream Cipher

• Free online RC4 stream cipher tool supporting input and output in text, Base64, and hexadecimal formats
• RC4 is a stream cipher algorithm with fast encryption and decryption, suitable for various data encryption scenarios
• All operations run locally in your browser, keeping your data secure and never uploading it

1. Open the tool page — no download or installation required
2. Select Encrypt or Decrypt mode, enter your content, and provide a secret key (or generate one automatically)
3. Click the Encrypt or Decrypt button to process, then click "Copy" to grab the result

• This tool is completely free and requires no sign-up
• Everything runs locally in your browser — your data never leaves your device

Free online RC4 encryption and decryption tool supporting multiple formats including text, Base64, and hexadecimal. RC4 is a stream cipher algorithm with fast encryption/decryption speed, suitable for data encryption scenarios. All operations are performed locally to protect your data security.

Open the tool page — no download or installation required Select Encrypt or Decrypt mode, enter your content, and provide a secret key (or generate one automatically) Click the Encrypt or Decrypt button to process, then click "Copy" to grab the result

This tool is completely free and requires no sign-up Everything runs locally in your browser — your data never leaves your device

Yes, RC4 Stream Cipher is completely free. No download or installation required — it runs right in your browser.