Text Encrypt & Decrypt Tool
Securely encrypt plain text or decrypt AES ciphertexts back to readable format using a secret password.
Decryption Failed!
Incorrect password or invalid ciphertext format.
Understanding Two-Way Symmetric Encryption (AES)
Unlike hashing (which is a one-way process), Symmetric Encryption allows data to be securely scrambled and later restored to its original state using the exact same secret key (password). This OnlinePaste Encrypt & Decrypt Tool utilizes the Advanced Encryption Standard (AES), the cryptographic algorithm established by the U.S. National Institute of Standards and Technology (NIST) and used worldwide to protect classified information.
How AES Encryption Works
When you select "Encrypt" and provide a password, the CryptoJS engine hashes your password to generate a secure 256-bit key. It then applies this key to your plain text using complex mathematical substitution and permutation rounds, outputting a randomized Base64 string that is impossible to read without the original password.
Safe Decryption Process
During "Decryption", the algorithm reverses the process. If even a single character of the ciphertext is altered, or if the password provided is incorrect, the mathematical decryption will fail, ensuring that your data's integrity and confidentiality remain intact. Because this tool runs 100% in your browser, your password and data never touch our servers.