Encryption

Free online tool. All processing is client-side. No signup needed.

How to Use the Encryption

1. Enter your input values above
2. Results update automatically
3. Copy or download the output

What is a Encryption?

An Encryption Tool provides symmetric encryption and decryption using the AES-256-GCM algorithm — the industry standard for data encryption (used by the US government for TOP SECRET information, TLS 1.3, and virtually every secure messaging app). AES-GCM provides both CONFIDENTIALITY (data is scrambled and unreadable without the key) and AUTHENTICITY (the authentication tag detects any tampering). This tool encrypts text, files, or any data, producing output that can only be read by someone with the correct password.

How Does It Work?

Enter the text to encrypt, choose a strong password (or generate a random 256-bit key), and the tool encrypts using AES-256-GCM: a random 96-bit initialization vector (IV) is generated, the plaintext is encrypted with the key (derived from the password using PBKDF2 with 600,000 iterations), and a 128-bit authentication tag is appended. The output is a Base64-encoded combination of IV + ciphertext + auth tag. Decryption reverses the process but only succeeds with the correct password. All processing is client-side.

Formula

AES-256-GCM Encryption:\n\n1. Key Derivation (PBKDF2-HMAC-SHA256):\n   Key = PBKDF2(password, salt, 600,000 iterations, 256 bits)\n\n2. Generate random 96-bit IV (Initialization Vector)\n\n3. Encrypt:\n   (ciphertext, auth_tag) = AES-256-GCM.encrypt(plaintext, key, IV)\n\n4. Output (Base64): salt || IV || ciphertext || auth_tag\n\nParameters:\n• Algorithm: AES-256-GCM (256-bit key, Galois/Counter Mode)\n• PBKDF2 iterations: 600,000 (OWASP 2026 recommendation)\n• Salt: 128-bit random (unique per encryption)\n• IV: 96-bit random (unique per message with same key)\n• Auth Tag: 128-bit (automatically verified on decryption)\n\nSecurity: Never reuse IV with the same key. Salt + random IV guarantee uniqueness.

Who Uses This Tool?

• Sending sensitive information (passwords, API keys, personal data) securely
• Storing encrypted configuration values that need to be decrypted later
• Developers testing encryption/decryption flows in their applications
• Privacy-conscious individuals encrypting personal data before cloud storage
• Educational: understanding how modern symmetric encryption works

Pro Tips

• AES-256-GCM is the gold standard — authenticated encryption with associated data. It's what TLS 1.3 uses. Avoid AES-CBC, ECB, or any non-authenticated mode
• The password is the weakest link. A strong encryption key derived from 'password123' is useless. Use 16+ character random passwords or generate a key directly
• Never reuse the same key+IV combination. Our tool generates a random IV for each encryption to prevent this. Reusing IV with GCM catastrophically breaks security
• Store the password separately from the encrypted data. An encrypted file and its password in the same location defeats the purpose — it's like locking a door and leaving the key under the mat

Frequently Asked Questions about Encryption

Can I recover my data if I forget the password?

No. AES-256-GCM has no backdoor. If you lose the password, the data is permanently inaccessible. This is by design — a backdoor would weaken security for everyone. Keep backups of your passwords.

How does AES-256 compare to ChaCha20?

Both are excellent symmetric ciphers. AES-256 has hardware acceleration on modern CPUs (AES-NI) making it fast. ChaCha20-Poly1305 is faster on mobile/ARM devices without AES-NI. TLS 1.3 supports both. For this tool, we use AES-256-GCM for its broad hardware support.

Free online Encryption — no signup, 100% client-side processing. All data stays in your browser.