Free Text Encryptor & Decryptor
Military-Grade AES-256 Encryption
Encrypt and decrypt text messages securely with AES encryption! Create secret locked messages with password protection. 100% client-side security.
Secure
Fast
Free
100% Client-Side Encryption - Your data never leaves your browser
Ctrl+Enter to encrypt
Ctrl+Enter to decrypt
Military-Grade AES-256
Your messages are protected with AES-256-GCM encryption, the same standard used by governments worldwide.
100% Client-Side
All encryption happens in your browser. Your messages never leave your device - we cannot see your data.
Instant & Unlimited
Encrypt and decrypt instantly with no limits, no registration, and completely free forever.
Why Choose Our Text Encryptor?
AES-256-GCM Encryption
Password Strength Meter
QR Code Generation
WhatsApp & Telegram Sharing
File Upload Support
Keyboard Shortcuts
Auto-Copy Option
Download Results
No Registration Required
Works on All Devices
Completely Free
100% Private
How to Encrypt and Decrypt Text Messages Online
Follow these simple steps to securely encrypt your sensitive messages and share them safely with anyone.
How to Encrypt a Message
Enter your secret message in the text area. You can type directly or upload a text file (.txt, .md, .json, etc.).
Create a strong password using the password field. Watch the strength meter to ensure your password is secure enough.
Click "Encrypt My Message" or press Ctrl+Enter. Your message will be instantly encrypted using AES-256 encryption.
Share the encrypted text via copy, download, QR code, email, WhatsApp, or Telegram.
Send the password separately through a different channel (phone call, SMS, different app) for maximum security.
How to Decrypt a Message
Switch to the "Decrypt" tab by clicking on "Decrypt (Read Secret)" at the top of the tool.
Paste the encrypted message you received into the encrypted message text area.
Enter the password that was shared with you separately by the sender.
Click "Decrypt My Message" or press Ctrl+Enter to reveal the original message.
Copy or download the decrypted message for your records if needed.
Who Uses Text Encryption? Common Use Cases
Our free online text encryptor is used by professionals and individuals worldwide to protect sensitive information.
Protect confidential business documents, financial reports, trade secrets, client information, and internal communications from unauthorized access.
Maintain attorney-client privilege by encrypting legal documents, case details, contracts, and sensitive client communications.
Share patient information, medical records, and healthcare data securely while maintaining HIPAA compliance and patient privacy.
Protect confidential sources, sensitive stories, and whistleblower communications with military-grade encryption.
Keep personal messages, passwords, private notes, financial information, and intimate communications completely private.
Share credentials, API keys, configuration files, and sensitive technical information securely within teams.
Frequently Asked Questions About Text Encryption
How secure is AES-256 encryption?
AES-256 (Advanced Encryption Standard with 256-bit key) is considered virtually unbreakable with current technology. It would take billions of years for the fastest supercomputers to crack a single key through brute force. This is the same encryption standard used by the U.S. government for classified information, banks for financial transactions, and military organizations worldwide.
Can you see my encrypted messages?
Absolutely not. All encryption and decryption happens 100% in your browser using client-side JavaScript. Your messages, passwords, and data never leave your device and are never sent to our servers. We have literally no way to see, store, or access your content. This is by design for maximum privacy.
What happens if I forget my password?
Unfortunately, there is no way to recover an encrypted message without the correct password. This is intentional and is what makes the encryption truly secure. Even we cannot decrypt your messages. We strongly recommend storing passwords in a secure password manager or writing them down in a safe place.
Why should I send the password separately?
This follows the "two-channel" or "out-of-band" security principle. If someone intercepts your encrypted message, they still cannot read it without the password. By sending the password through a different channel (phone call, SMS, different messaging app), you add an extra layer of security that significantly reduces the risk of interception.
Is there a character or file size limit?
There is no hard limit on message length. You can encrypt everything from short passwords to entire documents with thousands of characters. For very large texts (over 10,000 characters), processing may take slightly longer. File uploads are limited to 1MB text files for optimal performance.
Does this work on mobile phones and tablets?
Yes! Our text encryptor works perfectly on all devices including iPhones, Android phones, iPads, tablets, laptops, and desktop computers. It works in any modern web browser (Chrome, Firefox, Safari, Edge) without requiring any app installation or downloads.
What is PBKDF2 and why does it matter?
PBKDF2 (Password-Based Key Derivation Function 2) is a security algorithm that strengthens your password before using it for encryption. We use 100,000 iterations, which means even if someone tries to guess your password, each attempt takes significant computational time, making brute-force attacks completely impractical.
Can I use this for business and commercial purposes?
Yes! This tool is completely free for both personal and commercial use. There are no restrictions, no hidden fees, no premium tiers, and no usage limits. Use it as many times as you need for any legal purpose.
Why can't I use QR code for long messages?
QR codes have a maximum data capacity of approximately 2,000-3,000 characters. For longer encrypted messages, the QR code becomes too dense to scan reliably. For messages over 2,000 characters, we recommend using copy/paste, download, or direct sharing via email, WhatsApp, or Telegram instead.
Is this encryption compliant with regulations like HIPAA or GDPR?
AES-256 encryption meets the technical requirements for data protection under HIPAA, GDPR, and other privacy regulations. However, compliance depends on your overall security practices, not just the encryption tool. For regulated industries, consult with your compliance officer about your specific requirements.
Technical Security Details
Understanding how our encryption works helps you trust the security of your sensitive information.
AES-256-GCM Encryption
We use AES-256-GCM (Galois/Counter Mode), which provides both encryption and authentication. This ensures your data is not only encrypted but also protected against tampering. The 256-bit key length provides 2^256 possible combinations, making brute-force attacks mathematically impossible.
PBKDF2 Key Derivation
Your password is processed through PBKDF2 with 100,000 iterations using SHA-256 hashing. This transforms your password into a cryptographic key while adding computational cost that makes password guessing attacks extremely slow and expensive for attackers.
Random Salt & IV Generation
Each encryption uses a cryptographically random 16-byte salt and 12-byte initialization vector (IV). This ensures that encrypting the same message with the same password produces different ciphertext each time, preventing pattern analysis attacks.
Client-Side Processing
All cryptographic operations use the Web Crypto API built into your browser. Your data is processed entirely on your device using hardware-accelerated encryption. No data is ever transmitted to any server, ensuring zero-knowledge privacy.
Tips for Maximum Security
Use Strong Passwords
Create passwords with 12+ characters mixing uppercase, lowercase, numbers, and symbols. Avoid dictionary words and personal information.
Send Password Separately
Never send the encrypted message and password together. Use different channels like phone, SMS, or a different messaging app.
Verify Before Sharing
Double-check the recipient before sharing sensitive information. Encrypted messages can't be unread once decrypted.
Store Passwords Safely
Use a password manager or secure note to store encryption passwords. Lost passwords mean permanently lost messages.