Encrypt Text Online

Use this encrypt online tool to encrypt text, strings, JSON, YAML, and configuration values directly in your browser. Choose an algorithm, enter a passphrase, and get an encrypted result.

1. Select the encryption type (AES-256-CBC or 3DES).
2. Paste the text you want to encrypt.
3. Enter a passphrase to secure the data.
4. Click "Encrypt" and copy the output on the right.

This page produces CryptoJS AES-256-CBC output that works with this site's Decrypt Tool. CBC does not detect changed ciphertext, so choose AES-GCM Encrypt when you need that check. Choose 3DES only when another system specifically requires 3DES output; otherwise choose AES.

Use the Decrypt Tool with the same passphrase.

You can encrypt any text value, including:

• Text
• Strings
• JSON
• YAML
• Config files
• Logs and API payloads

Run a decrypt test first. The recipient needs the same algorithm and passphrase, and the passphrase should travel through a different channel from the encrypted text. Visit the Guides section for deeper explanations and best practices.

Encryption uses a secret to protect content. Encoding, including Base64, changes how data is represented but does not make it secret. Hashing is one-way and serves a different job again.

For a quick comparison, see our Encryption vs Encoding vs Hashing guide.

For a broader browser-first overview, read Browser-Side Cryptography Explained.

Use the Base64 Encode tool when you need text-safe encoding without encryption.

• AES-GCM Encrypt - Encrypt with a key, nonce, ciphertext, and authentication tag.
• Encryption Key Generator - Generate AES key bytes, nonces, and IVs locally.
• PBKDF2 Key Derivation - Reproduce key bytes from a password, salt, and explicit settings.
• Encrypt Text with OpenSSL - Follow the equivalent command-line workflow.