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Encryption uses AES-256-GCM in your browser. Plaintext never leaves your device. Learn more

Text Encryption & Decryption

Encrypt and decrypt text with a password using military-grade AES-256-GCM, fully client-side.

Privacy-first: All encryption and decryption happen in your browser. No text or passwords are ever sent to our servers.

Use a strong, unique password. Anyone who knows this password can decrypt the text.
Copy the encrypted text and share it securely. The recipient will need the password to decrypt.

About This Text Encryption Tool

This tool uses AES-256-GCM, the same encryption standard used by governments and financial institutions worldwide. All processing happens in your browser — your text and password never leave your device.

How AES-256-GCM Works

AES-256 Encryption

Advanced Encryption Standard with a 256-bit key is considered unbreakable with current technology. It would take billions of years to crack.

GCM Authenticated Encryption

Galois/Counter Mode provides both confidentiality and integrity. If the ciphertext is tampered with, decryption will fail.

PBKDF2 Key Derivation

Your password is converted into a cryptographic key using PBKDF2 with 100,000 iterations, making brute-force attacks extremely difficult.

How It Works

1. Enter your text

Type or paste the text you want to encrypt. Everything stays in your browser.

2. Set a password

Choose a strong password. This password is used to derive the encryption key.

3. Encrypt or decrypt

Click Encrypt to produce ciphertext, or paste ciphertext and click Decrypt to recover the original text.

Perfect For

Secure Messaging

Encrypt sensitive messages before sending them through email, chat, or social media.

Storing Secrets

Encrypt notes, API keys, or personal information before saving them in plain-text files or cloud storage.

Sharing Confidential Data

Share encrypted text with colleagues or friends. They can decrypt it here using the agreed password.

Best Practices

Use a strong password

Use a long, random password with mixed characters. A weak password compromises even the strongest encryption.

Share passwords separately

Never send the password through the same channel as the encrypted text. Use a different medium.

Keep your password safe

If you lose the password, the encrypted text cannot be recovered. Store passwords in a password manager.

Frequently Asked Questions

Is this tool really client-side?
Yes. All encryption and decryption happen in your browser using the Web Crypto API. No data is sent to any server. You can verify this by disconnecting from the internet and using the tool offline.
What encryption algorithm is used?
This tool uses AES-256-GCM (Advanced Encryption Standard with 256-bit key in Galois/Counter Mode). The encryption key is derived from your password using PBKDF2 with SHA-256 and 100,000 iterations.
Can I decrypt text encrypted with this tool on another device?
Yes. As long as you use the same password, you can decrypt the text on any device using this tool. The encrypted output contains all the information needed for decryption (salt, IV, and ciphertext).

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