AES Text Encryptor

Quick answer: AES Text Encryptor is a free online aes encryption: lock any text with a password using real AES-256-GCM encryption. This free AES text encryptor runs entirely in your browser — no signup, and your password never leaves your device. No account or install needed — it runs entirely in your browser, free.

Lock any text with a password using real AES-256-GCM encryption. This free AES text encryptor runs entirely in your browser — no signup, and your password never leaves your device.

What is the AES Text Encryptor?

AES encryption online lets you scramble text with a password using AES-256-GCM — the same encryption standard trusted by banks, governments and messaging apps worldwide. Type your secret, set a password, and get an encrypted blob you can store or send; anyone with the password and this tool can decrypt it back.

Security is done properly: your password is stretched through PBKDF2 with 100,000 iterations and a random salt, each message gets a fresh random initialization vector, and AES-GCM adds authentication so tampered ciphertext is rejected instead of silently decrypting. The output packs salt, IV and ciphertext into one portable base64 string.

Crucially, everything happens locally in your browser via WebCrypto — your password and plaintext are never sent to any server. It is free with no signup. Use it for private notes, credentials shared with a colleague, or any text that should stay unreadable without the password. Unlike classical ciphers, AES is not a puzzle — it is the actual encryption protecting your bank sessions, VPN tunnels and messaging apps right now. Using it here gives you the same grade of confidentiality for any text you choose, with no software to install.

How to use the AES Text Encryptor

  1. Choose Encrypt, then type or paste the secret text into the input box.
  2. Enter a strong password in the password field — longer and more random is better.
  3. Press the convert button to produce the encrypted base64 output.
  4. Copy the encrypted text and store or send it however you like — it is unreadable without the password.
  5. To decrypt, choose Decrypt, paste the encrypted text, enter the same password and convert.

AES Text Encryptor use cases

Private notes

Keep journal entries, personal records or sensitive reminders encrypted on your device or in cloud storage, readable only with your password. Encrypted notes stay private even if someone borrows your unlocked device briefly.

Sharing credentials safely

Send a colleague a Wi-Fi password or API key as encrypted text, then share the password through a separate channel like a phone call. Rotate the shared secret afterward so the password’s exposure window stays small.

Storing secrets in plain sight

An encrypted blob pasted in a notes app or email draft looks like gibberish to anyone browsing, but decrypts instantly for you. An encrypted blob draws far less attention than a file named ‘passwords’.

Classroom security demos

Teachers demonstrate real-world encryption concepts — keys, salts, initialization vectors — with a tool students can inspect and use hands-on. Students grasp key derivation viscerally when they watch wrong passwords fail.

Pre-encrypted backups

Encrypt sensitive text before saving it to USB drives or cloud folders, adding a password layer on top of whatever storage you use. Encrypt before uploading to any cloud service for a true zero-trust backup.

Tips

  • Use a long, unique password — encryption is only as strong as the password protecting it; a password manager can generate and store it.
  • Share the password through a different channel than the encrypted text (call it, do not email it alongside).
  • There is no password recovery: if you forget the password, the text cannot be decrypted by anyone, including us.
  • This tool encrypts text for confidentiality, but it does not verify who sent a message — pair it with a trusted channel for authenticity needs.

Frequently asked questions

How does the AES encryption work?
Your password is run through PBKDF2 with SHA-256, 100,000 iterations and a random 16-byte salt to derive a 256-bit key. That key encrypts your text with AES-256 in GCM mode using a fresh 12-byte random IV per message. Salt, IV and ciphertext are packed into one base64 string, so decryption needs only the password.
Is my password sent anywhere?
No. All cryptography runs locally in your browser using the WebCrypto API. Your password, plaintext and key never leave your device — there is no server involved at all. You can verify this yourself: the tool works with your network disconnected after loading.
What if I forget the password?
The text cannot be recovered. AES-256 with a properly derived key is computationally infeasible to brute force, and there is no backdoor or recovery mechanism. Store important passwords in a password manager. Consider storing the password in a reputable password manager as your safety net.
What does 'authentication failed' mean when decrypting?
AES-GCM verifies the ciphertext has not been altered. If you see a decryption failure, the cause is almost always a wrong password, but it can also mean the encrypted text was truncated or modified in transit — paste it completely and exactly.
Can I decrypt text encrypted elsewhere?
Only if the other tool uses the identical format: PBKDF2-SHA256 with 100,000 iterations, 16-byte salt, 12-byte IV, AES-256-GCM, packed as base64(salt|iv|ciphertext). Formats differ between tools, so cross-tool decryption usually does not work.
Is AES-256 really secure?
Yes — AES-256 is the global standard for symmetric encryption, approved for top-secret data and used in banking, VPNs and encrypted messaging. With a strong password, ciphertext produced here is practically unbreakable. No practical attack exists against AES-256 itself; real-world breaks always target passwords or implementations.
Is the AES text encryptor free?
Yes — free, unlimited, no signup. Encrypt and decrypt as much text as you like, entirely in your browser. Encrypt and decrypt unlimited text for life — free forever, with no account, no quotas and no watermarks. Your password and plaintext never leave your device, so private means private.