Text Encrypt / Decrypt
Encrypt and decrypt text using AES-256 password protection
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
About this tool
Encrypt text using AES-256 with a password you choose, producing scrambled ciphertext that can only be decrypted back to the original with the same password - useful for protecting sensitive notes, sharing a secret securely, or encrypting text before storing it somewhere less trusted.
How to use this tool
- Choose encrypt or decrypt modeSelect whether you want to protect or recover text.
- Enter plaintext/ciphertextPaste source content exactly, preserving formatting where needed.
- Set strong passwordUse long unique passphrase for reliable protection.
- Run and copy outputGenerate ciphertext or restored plaintext instantly in-browser.
How to share encrypted text safely
Encrypt your message with a strong password and send the encrypted text by one channel - email, for example - and the password by another, such as a phone call or a text message. Anyone who sees only one of the two cannot read the message.
Use a long password: a phrase of four or more random words is far stronger than a short password with symbols. There is no way to recover the text if the password is lost.
Key features
- Strong AES-256 protection for sensitive text snippets.
- Runs locally so content and passwords stay on device.
- Simple workflow for secure sharing of short secrets.
- Supports both encryption and decryption in one interface.
Common uses
- Protecting confidential notes before storage.
- Sharing temporary credentials via encrypted text.
- Creating secure snippets for cross-channel communication.
- Teaching encryption basics in practical demos.
Tips for better results
- Use unique passphrase per secret context.
- Share password through separate channel from ciphertext.
- Store recovery password safely; no reset exists.
- Test decrypt flow once before relying on workflow.
Mistakes to avoid
- Using weak or reused passwords for encryption.
- Sending password and ciphertext in same message.
- Assuming encrypted text is recoverable without key.
- Pasting modified ciphertext and expecting successful decrypt.
Frequently asked questions
AES-256 is a widely-trusted, industry-standard encryption algorithm used to protect everything from government data to banking systems - it's considered extremely secure when used correctly with a strong password.
The password is not stored anywhere by this tool - if you forget it, there is no way to recover the original text from the encrypted output. Keep the password somewhere safe.
Encryption/decryption runs entirely in your browser - neither your text nor your password is transmitted anywhere.
The encryption algorithm is only as strong as the password protecting it - use a long, random, unique password rather than something easily guessable, since a weak password undermines even strong encryption.
Send the encrypted text through one channel, such as email, and the password through another, such as a phone call. Agree on the password in person if the content is very sensitive.
Usually yes: a random salt and IV are added each time, so encrypting the same message twice gives different output. That stops anyone spotting repeated messages.
Long-term storage of irreplaceable data without a backup of the password, or anything that needs a full secure messaging system with identity checks. For everyday private notes and one-off secrets it works well.