Free AES Encryption Tool
Encrypt and decrypt text using military-grade AES-256-GCM encryption. All encryption happens locally in your browser—your data never leaves your device.
Last Updated: 15 Jan 2026
What is an AES Encryption Tool?
An AES encryption tool is a security application that uses the Advanced Encryption Standard (AES) to protect sensitive text data. AES-256-GCM is a military-grade encryption algorithm trusted by governments, banks, and security professionals worldwide. This tool encrypts your text using a password, converting readable information into an unreadable encrypted format that can only be decrypted with the correct password.
Text encryption is essential for protecting sensitive information from unauthorized access. Whether you're storing passwords, sharing confidential notes, or securing personal data, encryption ensures that only those with the correct decryption key can read your information. Our free encryption tool performs all operations client-side, ensuring your data never leaves your device and remains completely private.
Why Use Our Free AES Encryption Tool?
Military-Grade Security
Uses AES-256-GCM encryption, the same standard trusted by governments and banks worldwide. Provides both confidentiality and authenticity, ensuring your data cannot be read or tampered with.
100% Client-Side
All encryption and decryption happens entirely in your browser. Your plaintext and encryption keys never leave your device, ensuring complete privacy and security.
Easy to Use
Simple interface for encrypting and decrypting text. Just enter your text, set a password, and encrypt. Decrypt anytime with the same password on any device.
Common Use Cases for AES Encryption Tool
For Personal Security
Secure Password Storage
Encrypt passwords and sensitive credentials before storing them in notes, documents, or cloud storage. Ensure passwords remain secure even if storage is compromised.
Confidential Notes
Protect personal notes, financial information, or private thoughts by encrypting them before saving. Keep sensitive information secure on your device or in cloud storage.
Secure Communication
Encrypt messages before sending them via email or messaging apps. Share encrypted text that can only be decrypted by recipients with the password.
For Business & Compliance
Data Privacy Compliance
Encrypt sensitive customer data or personal information to comply with privacy regulations like GDPR and CCPA. Protect data at rest and in transit.
Secure Document Sharing
Encrypt documents before sharing them via email or cloud storage. Ensure only authorized recipients can access sensitive business documents.
Backup Security
Encrypt sensitive data before backing it up to external drives or cloud services. Protect backups from unauthorized access even if physical media is lost or stolen.
How AES Encryption Works
Enter Your Text
Type or paste the text you want to encrypt into the input field. This could be passwords, sensitive notes, confidential information, or any text you want to protect.
Create a Strong Password
Enter a strong encryption password. This password will be used to encrypt and decrypt your text, so make it secure and memorable. Use our Password Generator if needed.
Encrypt the Text
Click the 'Encrypt' button. Your text will be encrypted using AES-256-GCM and displayed as an encrypted string. The encryption happens instantly in your browser.
Save or Share Encrypted Text
Copy the encrypted text and store it securely. You can safely share this encrypted text—it cannot be read without your password. Store the password separately and securely.
Understanding AES Encryption
AES-256
Uses a 256-bit encryption key, providing 2^256 possible combinations. This makes brute-force attacks computationally infeasible, even with supercomputers.
GCM Mode
Galois/Counter Mode provides both encryption and authentication, ensuring data integrity and preventing tampering or unauthorized modifications.
Client-Side Processing
All encryption happens in your browser. Your plaintext and keys never leave your device, ensuring complete privacy and security.
Industry Standard
AES is the encryption standard adopted by the U.S. government and used globally for securing classified and sensitive information.
Frequently Asked Questions
What is AES-256-GCM encryption?
AES-256-GCM (Advanced Encryption Standard with 256-bit key in Galois/Counter Mode) is a military-grade encryption algorithm used by governments and security professionals worldwide. It provides both confidentiality and authenticity, ensuring your encrypted data cannot be read or tampered with by unauthorized parties.
Is my data safe when using this encryption tool?
Yes, your data is completely safe. All encryption and decryption operations happen entirely in your browser using client-side JavaScript. Your plaintext and encryption keys are never sent to our servers or stored anywhere. Only you have access to your encrypted data and decryption keys.
What should I use as an encryption password?
Use a strong, unique password that you'll remember but others can't guess. We recommend at least 12-16 characters with a mix of uppercase, lowercase, numbers, and symbols. You can use our Password Generator to create a secure encryption key. Remember: if you lose your password, you cannot decrypt your data.
Can I decrypt data encrypted with this tool on another device?
Yes, as long as you have the encrypted text and the correct password, you can decrypt it on any device using this tool. The AES-256-GCM algorithm is a standard, so the encrypted output is portable across devices and platforms.
What happens if I forget my encryption password?
If you forget your encryption password, your encrypted data cannot be recovered. AES-256-GCM encryption is designed to be irreversible without the correct password. Always store your encryption password securely, preferably in a password manager.
Is this encryption tool free to use?
Yes, our AES encryption tool is completely free to use with no limits or sign-ups required. Encrypt and decrypt unlimited text securely using military-grade encryption.