PBKDF2 Hash Calculator
Online PBKDF2 hash tool in browser
All hashing runs in your browser. Data is never sent to any server.
📋 Salt interpretation · Output format · Verification guide
- Even length + only 0-9, a-f, A-F → decoded as hex (e.g. a1b2c3d4...)
- Otherwise → used as UTF-8 text
Only the derived key is output as a hex string. Salt, iterations, hash, and key length must be stored separately.
Password, Salt, Iterations, Hash, and Derived key (hex) must all match for verification to succeed.
Other tools may use different salt encoding (hex vs UTF-8) or output formats. Our implementation produces the same results as Node.js/Python standard libraries.
Password Input
Verify Password
PBKDF2 Guide
Use PBKDF2 when you need password-oriented hashing with verification support.
1. How can I use this PBKDF2 hash calculator on this page?
- Enter your password in the input box.
- Set salt (or use Random), iterations, hash algorithm, key length.
- Choose Salt format (Auto for hex salt, UTF-8 for cross-tool compatibility).
- Click 'Generate' and use Verify to test password against derived key.
- Copy derived key (hex) and salt for storage; parameters must be stored too.
2. How does this calculator compute PBKDF2 locally in my browser?
PBKDF2 (RFC 2898): DK = PBKDF2(PRF, password, salt, c, dkLen) where PRF is HMAC with a hash (e.g., HMAC-SHA256).
Formula: U₁ = PRF(password, salt||INT(1)); Uᵢ = PRF(password, Uᵢ₋₁); Tᵢ = U₁⊕U₂⊕...⊕Uᵢ. DK = T₁||T₂||... truncated to dkLen.
Iterations: c iterations (e.g., 100,000) make each candidate guess expensive. Salt ensures different users get different keys even with same password.
HMAC: HMAC(K,m) = H((K'⊕opad)||H((K'⊕ipad)||m)) with opad=0x5c repeated, ipad=0x36 repeated.
3. What is PBKDF2, and when should I use it?
PBKDF2 is the classic password-based key derivation function (RFC 2898). Used in TLS, WPA2, Django, and many frameworks.
This PBKDF2 hash calculator derives keys with configurable iterations, hash (SHA-1/256/384/512), salt, and key length. Salt format options support cross-tool compatibility.
All processing runs locally.
4. Why choose PBKDF2 over other hash or checksum algorithms?
- Standard: Widely implemented and standardized.
- Configurable: Adjust iterations for security vs. performance.
- Hash flexibility: Use SHA-256, SHA-512, etc.
- Compatibility: Works with Django, Node, Python, etc.
5. Where is PBKDF2 commonly used in apps and infrastructure?
- Password hashing: Django, Laravel, and others use PBKDF2.
- Key derivation: Derive encryption keys from passwords.
- TLS/WPA2: Key derivation in network protocols.
- Legacy systems: When PBKDF2 is required.