Text Encryptor — AES-256-GCM Password Encryption (Free)

1. Type or paste the text you want to protect.
2. Enter a strong password — the longer and more varied, the better.
3. Click Encrypt and copy the resulting ciphertext; paste the ciphertext and the same password and click Decrypt to recover the text.

Everything runs locally in your browser. Your text, your password and the ciphertext never leave your device, so you can protect notes, credentials and messages with confidence.

The tool encrypts your text with AES-256-GCM, the authenticated encryption algorithm trusted across the industry. A random salt is used to derive a unique key from your password, and every encryption uses a fresh random IV (initialization vector), so encrypting the same text twice produces different ciphertext. The salt and IV are stored alongside the ciphertext, which means decryption only needs the ciphertext and your password — nothing else to manage. Because GCM is authenticated, tampered or corrupted ciphertext is detected rather than silently decrypted.

Tips

Choose a passphrase that is long, unique and memorable — for example, a short sentence you do not use anywhere else — rather than a short password. Store the ciphertext and the password in separate places, and test the round trip with a short message before encrypting something important. Note that the ciphertext is slightly longer than the input, because the salt, IV and authentication tag are stored with it.

Why use it

Sending plain text in messages, emails or cloud notes leaves your words readable to anyone who finds them. This encryptor gives you real AES-256-GCM protection with a single password, no account, no cost and no server in the loop. Encrypt a note, share only the ciphertext, and only someone with the password can ever read it.

Real-world use cases

• Content production: Transform text for CMS, spreadsheets or translation workflows without manual retyping.
• Data handling: Clean and normalize strings before pasting into code, databases or AI prompts.
• Privacy-sensitive work: Process contracts, notes or personal text that you would never upload to a server.

How it compares

When privacy and instant access matter, a browser-only tool is the most practical choice.

Pro tips

• For large texts, paste in chunks if your device is older. The tool still processes locally but will stay snappier.
• Combine with other tools: convert case, then run text analyzer for frequency, then encrypt if you need to share.
• Use diff mode to proofread translations or AI rewrites side-by-side before publishing.