AES Encryption / Decryption

Encrypt and decrypt text using AES-256-GCM. Everything runs locally in your browser - no data is sent to any server.

Security Notice: This tool uses the Web Crypto API (AES-256-GCM) with a key derived from your passphrase via PBKDF2 (100,000 iterations). Keep your passphrase secret.

How AES-256-GCM Works

256-bit Key Size
GCM Authenticated Mode
PBKDF2 Key Derivation
  • AES-256-GCM provides both confidentiality and authenticity (tamper detection)
  • PBKDF2 with 100,000 iterations derives a secure key from your passphrase
  • A random salt and IV are generated for each encryption
  • Output is Base64-encoded and contains salt + IV + ciphertext
Browse All Tools ›
Security Tools
AES-256-GCM (SHA-256 KDF) New

Decrypt Node crypto AES-GCM middleware payloads
Security Tools
Hash Generator

Generate MD5, SHA hashes
Security Tools
CSP Generator New

Build Content Security Policy headers
Security Tools
HMAC Generator New

Generate HMAC signatures
Document Converter
CSV to Markdown Table New

CSV to GitHub-flavored MD table
Schema Generators
Review Schema

Star ratings markup