This free online Scrypt Hash Generator allows you to securely generate and verify scrypt password hashes directly in your browser. It supports configurable N, r, and p parameters, multiple output encodings, execution time measurement, and built-in security analysis.
Choosing the right parameters for scrypt can be tricky and easy to misconfigure. I've shared my real-world experience comparing Argon2, bcrypt, and scrypt, including when scrypt makes sense and when it doesn't.
Configure scrypt parameters (N, r, p) and generate a secure, memory-hard password hash.
Verify whether a password matches an existing scrypt hash using the same parameters.
Scrypt is a memory-hard password-based key derivation function designed to resist large-scale brute-force attacks using GPUs and ASICs. By consuming both CPU and memory, scrypt makes password cracking significantly more expensive compared to traditional hashing algorithms.
Argon2 is the recommended password hashing algorithm for modern applications due to its resistance against GPU, ASIC, and side-channel attacks. By combining the strengths of Argon2 and Argon2d, it offers a balanced defense suitable for web applications, APIs, and backend services. This tool demonstrates how to use Argon2id the right way. 🔒 Secure web hosting
Scrypt was specifically designed to be memory-hard meaning it requires a large amount of RAM in addition to CPU power to compute a password hash. This design makes large-scale brute-force and GPU attacks significantly more expensive.
Unlike fast cryptographic hashes such as SHA-256, a scrypt password hash forces attackers to allocate substantial memory per guess. This makes parallel attacks on GPUs, FPGAs, or ASICs inefficient and costly.
The key parameters that control scrypt's memory hardness are:
This scrypt hash generator allows you to experiment with these values and understand how scrypt parameters impact both security and performance.
While scrypt is excellent for password hashing, there are scenarios where other algorithms may be more appropriate:
| Parameter | Description | Recommended Value | Impact |
|---|---|---|---|
N |
CPU/Memory cost factor (must be power of 2) | 16384 (2^14) | Higher = more memory & time required |
r |
Block size parameter | 8 | Affects memory usage (128 Ã N Ã r bytes) |
p |
Parallelization factor | 1 | Higher = more parallel threads possible |
dkLen |
Derived key length in bytes | 32 (256 bits) | Length of the output hash |
| Algorithm | Memory-Hard | GPU Resistant | ASIC Resistant | Recommended For |
|---|---|---|---|---|
| Scrypt | ✓ Yes | ✓ Good | ✓ Good | Password hashing, cryptocurrency |
| Argon2id | ✓ Yes | ✓ Excellent | ✓ Excellent | New applications (PHC winner) |
| bcrypt | ✗ No | ✓ Moderate | ✗ Limited | Legacy systems, moderate security |
| PBKDF2 | ✗ No | ✗ Weak | ✗ Weak | Compatibility, FIPS compliance |