Password Hasher - PBKDF2-SHA256

Securely hash and verify passwords using PBKDF2-SHA256 with auto-generated salt. Includes benchmark to tune iteration count. 100% client-side.

Last reviewed: April 2026
Reviewed by , software engineer · last updated April 2026

New to this tool? Click here for instructions

Password
Password strength: -
Iterations
Output Hash (PBKDF2-SHA256)
Click "Generate Hash" to create a PBKDF2 hash.
Enter a password and click "Generate Hash" to create a PBKDF2-SHA256 hash.

How to Use the Password Hasher

To use the Password Hasher, follow these steps:

1. Hash Mode: Enter a password, choose an iteration count, and click 'Generate Hash'. Copy the output string to store in your database.

2. Verify Mode: Paste the stored hash string and enter the password. The tool will re-derive the key with the same salt and iterations and check if they match.

3. Benchmark Mode: Run a benchmark to see how long each iteration count takes on your current device. This helps you choose a safe iteration count for your server hardware.

When to Use the Tool in Real Workflows

Use the Password Hasher in any scenario where you need to securely store and verify passwords. This includes user registration, login, and password reset processes in web applications, mobile apps, and other services.

How It Works

The Password Hasher uses the PBKDF2-SHA256 algorithm to hash passwords. PBKDF2 is a NIST-approved alternative to bcrypt that is built into the Web Crypto API and supported by most programming languages. The tool allows you to configure the iteration count, which affects the security and performance of the hash. Higher iteration counts provide stronger security but can impact user experience.

Tips, Edge Cases, or Limitations

1. Iteration Count: Choose a high iteration count (600,000+ for NIST recommendation) to ensure strong security. Use the benchmark mode to find the right balance between security and performance.

2. Auto-Generated Salt: The tool automatically generates a salt for each password, which is essential for security. Do not use bare hashes without a salt.

3. Client-Side Execution: All operations are performed client-side, ensuring that passwords never leave your browser, enhancing security.

4. Benchmarking: Use the benchmark mode to measure performance on your current device and calibrate the right iteration count for your server hardware.

Frequently Asked Questions

PBKDF2 is built into the Web Crypto API and supported by most programming languages, making it a NIST-approved alternative to bcrypt. It provides strong resistance to brute-force attacks and is used by many security standards and frameworks.
The NIST recommended minimum as of 2023 is 600,000 iterations for PBKDF2-SHA256. Higher is better, but the practical limit is the impact on user experience. Use the benchmark mode to find the right balance.
A salt is a random value added to the password before hashing. It ensures that even if two users have the same password, their hashes will be different, preventing attackers from using precomputed rainbow tables.
Yes, all operations are performed client-side, ensuring that passwords never leave your browser. The tool uses the PBKDF2-SHA256 algorithm, which is a NIST-approved alternative to bcrypt, providing strong security.
The output format is a string representing the hashed password. It includes the salt and the hash value.

Quick reference

Password Hasher - PBKDF2-SHA256 Parameters
Parameter Description Default Value Notes
Password The user's input password string examplePassword123 Must be at least 8 characters with mixed case and symbols
Salt Randomly generated 16-byte value 32 hex characters (e.g. 4a1e8c7d2f901234) Stored alongside the hash for verification
Iteration Count Number of hash computations 100000 Higher values increase security but reduce performance
Key Length Desired length of derived key in bits 256 Common values: 128, 192, 256 bits
Hash Function Algorithm used for HMAC operations SHA-256 Must match the algorithm specified in the implementation
Output Derived key bytes 32 bytes (256 bits) Base64 encoded for storage/display