PBKDF2 Generator
Derive and verify PBKDF2 keys using the browser Web Crypto API. Fully client-side - nothing leaves your device.
What is PBKDF2?
PBKDF2 (Password-Based Key Derivation Function 2) is a key stretching algorithm designed to make brute-force attacks computationally expensive.
- Salt - a random value added before hashing to prevent rainbow table attacks. Each password should have a unique salt.
- Iterations - how many times the hash function is applied. Higher = slower to brute-force. NIST recommends 310,000+ for SHA-256.
- Key length - the size of the derived output in bits.
- Use cases - password storage, key stretching, encrypting private keys with a passphrase.
PBKDF2 (Password-Based Key Derivation Function 2) derives a cryptographic key from a password by applying a hash function many times in a row - the repeated iterations deliberately slow down the process to resist brute-force attacks, similar in purpose to BCrypt/Argon2. This tool derives and verifies keys using PBKDF2 entirely in your browser.
Frequently asked questions
How many times the underlying hash function is applied - higher iteration counts make the derivation slower and more resistant to brute-force attacks, at the cost of also taking longer for legitimate use.
PBKDF2 is a well-established, widely-used standard, though Argon2 (and to a lesser extent BCrypt) are generally considered to offer better resistance against specialized hardware attacks (like GPU cracking) due to their memory-hardness. PBKDF2 remains acceptable and is required in some compliance standards.
Computation runs in your browser, but as a general precaution, avoid using real production passwords in any third-party tool - use test values when exploring how PBKDF2 behaves.