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AES-256-GCM text encryption and decryption powered by the Web Crypto API.
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Text encryption is the process of converting readable plaintext into an unreadable ciphertext using a cryptographic algorithm and a secret key. Only someone with the correct key can decrypt the ciphertext back to the original plaintext. In an era of data breaches, surveillance, and cyber threats, encryption is the most effective way to protect sensitive information — from personal messages and passwords to financial data and business secrets. Our free online AES encryption tool at Jayax.dev provides military-grade AES-GCM encryption directly in your browser with zero data transmission.
Unlike encoding tools (like Base64) that simply reformat data, encryption provides genuine security by making data unreadable without the correct password. Our tool uses AES-256-GCM — the same encryption standard used by governments, banks, and security professionals worldwide — combined with PBKDF2 key derivation for maximum password protection. Every encryption operation generates a unique random salt and initialization vector, ensuring that encrypting the same text with the same password always produces a different output.
Our message encryption tool is designed for simplicity while maintaining the highest security standards. Follow these steps:
Understanding the encryption process helps you use the tool effectively and appreciate its security guarantees.
Your password is not used directly as the encryption key. Instead, it is processed through PBKDF2 (Password-Based Key Derivation Function 2) with 100,000 iterations of SHA-256 and a random salt. This key stretching makes brute force attacks on passwords extremely expensive — each password guess requires 100,000 hash computations.
The derived key is used to encrypt your text with AES-256 in GCM mode. GCM provides both confidentiality (your data cannot be read) and authenticity (any tampering is detected). Each encryption uses a unique random initialization vector (IV), ensuring identical plaintexts produce different ciphertexts.
The encrypted output is a Base64 string containing the salt, IV, and ciphertext. This self-contained format means you only need the encrypted string and the password to decrypt — no additional parameters are required.
To get the maximum security benefit from this tool, always use strong, unique passwords — at least 12 characters with a mix of uppercase, lowercase, numbers, and symbols. Never reuse passwords across different encryptions. Share passwords through a different channel than the encrypted message (for example, send the encrypted text via email but share the password verbally or via a separate messaging app). For highly sensitive data, consider using dedicated encryption software like GPG for additional features like public-key cryptography and key management.
This tool uses AES-GCM (Advanced Encryption Standard with Galois/Counter Mode), which is one of the most secure encryption algorithms available. AES-GCM provides both confidentiality (encryption) and integrity (authentication) in a single operation, ensuring that encrypted data cannot be read or modified without the correct key. It is the same algorithm used by governments, banks, and security professionals worldwide.
Enter the text you want to encrypt in the input field, type a strong password (secret key), and click Encrypt. The tool uses your password to derive a cryptographic key via PBKDF2 and then encrypts the text with AES-GCM. The encrypted output is a Base64 string that can only be decrypted with the same password.
Paste the encrypted Base64 string into the input field, enter the same password that was used to encrypt it, and click Decrypt. The tool will derive the same cryptographic key from your password and use it to decrypt the message. If the password is incorrect, decryption will fail with an error.
Yes, all encryption and decryption happens entirely in your browser using the Web Crypto API. No data, passwords, or encrypted output is ever transmitted to any server. The encryption key is derived from your password using PBKDF2 with 100,000 iterations and a random salt, making brute force attacks extremely difficult.
If you forget the password used to encrypt your text, the data cannot be recovered. AES-GCM encryption is mathematically designed to be irreversible without the correct key. There is no backdoor, master key, or recovery mechanism. This is by design — it ensures that only someone with the correct password can access the encrypted data.
AES-GCM (Galois/Counter Mode) provides both encryption and authentication in a single operation, meaning it not only keeps data confidential but also detects any tampering. AES-CBC (Cipher Block Chaining) only provides encryption and requires a separate HMAC for integrity verification. GCM is faster, more secure, and is the recommended mode for most applications by NIST and security experts.
PBKDF2 (Password-Based Key Derivation Function 2) converts your password into a cryptographically strong encryption key by applying a hash function thousands of times. This process, called key stretching, makes brute force attacks on passwords much more expensive. Our tool uses 100,000 PBKDF2 iterations with SHA-256, which means each password guess takes significant computation time.
This tool is designed for text encryption. For file encryption, you would need to convert the file to a Base64 string first (using our Base64 tool), encrypt the resulting string, and then reverse the process to decrypt. For large files, dedicated file encryption tools like VeraCrypt or GPG are more practical.
AES-256 is considered military-grade encryption and is approved by the US National Security Agency (NSA) for protecting classified information at the Top Secret level. With a 256-bit key, there are 2^256 possible keys — a number so vast that brute-forcing it would take billions of years even with the most powerful supercomputers. The encryption itself is unbreakable with current technology.
Encoding (like Base64) converts data into a different format for convenience or compatibility and can be easily reversed by anyone. Encryption transforms data using a secret key so that only authorized parties with the correct key can read it. Encoding provides no security, while encryption provides genuine data confidentiality. Use encryption when you need privacy, and encoding when you need format compatibility.
