What is Our Encrypt/Decrypt Tool?
It is a simple yet powerful tool that uses the Advanced Encryption Standard (AES) to transform your plain text into a secure, unreadable format (ciphertext) and back again, using a password that only you know.
Secure, Private, and In Your Browser
Our Secure Message Tool leverages AES, the same encryption standard used by governments and corporations worldwide to protect sensitive data. When you encrypt a message, the tool combines your text with your secret passphrase to generate a complex, scrambled string of characters.
Only someone who has the exact encrypted message and the exact passphrase can reverse the process to reveal the original text. The entire operation happens on your computer (client-side), meaning your message and passphrase are never sent over the internet. This guarantees complete privacy and security.
Why Choose Our Encryptor Tool?
Real-time Passphrase Validation
Our tool guides you to create a strong password, ensuring your encryption is robust and secure before you even start.
Completely Private & Secure
All encryption, decryption, and history storage happens on your device. Your data never leaves your browser.
Convenient Local History
Save your named encryption/decryption sessions in your browser for easy recall without server-side storage.
Free and Unlimited
Encrypt and decrypt as many messages as you need, completely free of charge. No sign-ups required.
Use Our Encrypt/Decrypt Tool
Enter your message, upload a text file, and protect it using AES encryption with a secure passphrase. You can encrypt, decrypt, copy, or download results instantly — all within your browser.
Result
History
How to Encrypt or Decrypt
Follow these simple steps to secure your messages with a password.
Enter Your Data
Select **Encrypt** or **Decrypt** mode. Enter your message and a strong passphrase that meets all the security requirements shown in the checklist.
Process and Save
Click the "Encrypt/Decrypt Now" button. After the result appears, click "Save to History", give your entry a name, and confirm. Your session is now saved for later use.
Reload from History
Simply click on any saved item in the history list. The tool will automatically fill in the mode, message, and passphrase, ready for you to re-process or review.
Quick Tips for Secure Messaging
Use a Strong Passphrase
Your security is only as strong as your passphrase. Use a long, complex, and unique password for best results.
Don't Lose Your Passphrase
There is no "forgot password" option. If you lose your passphrase, your encrypted data is permanently unrecoverable.
Clear History on Shared Devices
Remember to use the "Clear All History" button if you are using a computer that others may have access to.
Ready to Send a Secure Message?
Protect your private conversations and notes with strong, password-based encryption. Get started now—it's free and instant.
Encryption Applications
Password-based encryption is perfect for securing text-based information in many everyday scenarios.
Sending Confidential Information
Send sensitive information like passwords, API keys, or personal details over email or chat. You can send the encrypted message publicly and share the passphrase separately and securely (e.g., over the phone).
Securely Storing Personal Notes
Keep a diary, journal, or list of private notes in a cloud service like Google Keep or Evernote without worrying about anyone reading them. Just encrypt the text here first before saving it.
Sharing a Secret with a Friend
Want to post a message for a specific person on a public forum? Encrypt the message with a pre-agreed passphrase. Only they will be able to decrypt and read the hidden message.
Who Can Benefit?
Privacy-Conscious Individuals
Anyone who needs to send or store private text without using complex software.
Teams & Colleagues
Quickly and securely share temporary credentials, API keys, or other sensitive information.
Journalists & Activists
A simple tool for protecting notes and communications without leaving a digital trail on a server.
Trusted by Thousands for 100+ Free Online Tools
Join a growing community of creators, developers, and businesses who rely on our all-in-one tools platform for secure, fast, and free online tools. Your trust is our top priority—no sign-ups, no hidden costs, and complete privacy.
Frequently Asked Questions
Get instant answers to common questions about our Encrypt/Decrypt Tool.
Is this tool really secure?
Yes. It uses the Advanced Encryption Standard (AES), which is the encryption standard specified by the U.S. National Institute of Standards and Technology (NIST). More importantly, all operations happen in your browser, so your secret data is never sent to us or anyone else.
What happens if I forget my passphrase?
Your encrypted data will be permanently unrecoverable. There is no "forgot password" feature because we never know your passphrase. This is a critical feature for security, so be sure to store your passphrase safely.
Is it safe to save history?
The history feature is convenient but comes with a risk: your passphrase is stored in plain text within your browser's local storage. While other websites cannot access it, anyone with physical access to your computer or malicious browser extensions could potentially view it. **Do not use the history feature on a public or shared computer.**
Why does my decrypted text look like gibberish?
This almost always means you have used the wrong passphrase or that the encrypted text was not copied correctly. Passphrases are case-sensitive, and the encrypted text must be exact. Even a single extra space will cause decryption to fail.
Need Help or Have Questions?
Our support team is ready to assist you with any questions or technical issues.
Contact Support Team