Scrypt Hash Generator Online

🚀 What is Scrypt?

Scrypt is a memory-hard key derivation function designed to make password cracking extremely expensive. Unlike simple hash functions, scrypt requires significant amounts of RAM, making it resistant to GPU and ASIC-based attacks. Use this tool to generate secure password hashes directly in your browser. Experiment with different cost parameters (N, r, p) and see how they impact both security strength and computation time in real-time.

💻 100% Client-Side Execution. No Data Sent to Server 🔒 Secure

🔒 Generate Secure Scrypt Password Hash

Configure scrypt parameters (N, r, p) to create a memory-hard, brute-force resistant password hash.

🔐 Password or Secret to Hash

🧂 Cryptographic Salt (Unique per Password)

⚡ N - CPU & Memory Cost Factor

📦 r - Memory Block Size

🔀 p - Parallel Threads Count

📏 Output Key Length (in Bytes)

📤 Hash Output Format

Generated Scrypt Hash

Execution time: 0 ms

✅ Verify Password Against Scrypt Hash

Check if a password matches an existing scrypt hash by regenerating with the same parameters.

🔐 Password to Verify

🧂 Original Salt Used

🔑 Expected Hash to Match

🔎 Security Analysis

🔒 Your Privacy is Protected: All hashing happens locally in your browser. We never store, transmit, or log any passwords or keys you enter.

🛠 How This Scrypt Generator Works

Step 1: Enter Your Credentials

Type or paste the password you want to hash into the input field. For the salt, you can either generate a cryptographically secure random value using the "Generate" button, or provide your own unique salt string.

Step 2: Configure Your Parameters

Adjust the three core scrypt parameters based on your security requirements:

N (Cost Factor): Controls overall computation time and memory. Start with 16384 for most applications
r (Block Size): Affects memory bandwidth. The default value of 8 works well for most systems
p (Parallelization): Determines how many independent operations run. Keep at 1 unless you have specific multi-threading needs

Step 3: Generate and Store

Click "Generate Hash" to compute your scrypt hash. The result appears in your chosen format (Hex or Base64). Important: Always store both the hash AND the salt together - you'll need both to verify passwords later.

Verifying Passwords

To check if a password matches a stored hash, use the verification panel on the right. Enter the password, the original salt, and the expected hash. The tool will recompute the hash and tell you if they match.

🛡 Security Best Practices for Scrypt

Choosing the Right Cost Factor (N)

The N parameter is your primary security dial. Here's a practical guide for 2024-2026:

Interactive logins (web apps): N=16384 to N=32768 - balances security with sub-500ms response times
Background processing: N=65536 to N=131072 - when users don't wait, maximize security
Sensitive data (encryption keys): N=131072 or higher - prioritize security over speed

Salt Generation Guidelines

A proper salt is critical for scrypt security:

Always unique: Generate a fresh random salt for every password - never reuse salts
Sufficient length: Use at least 16 bytes (128 bits) of cryptographically random data
Store with hash: The salt is not secret - store it alongside your hash in your database

Common Implementation Mistakes

Avoid these frequent errors when implementing scrypt:

Using weak salts: Don't use usernames, timestamps, or predictable values as salts
Setting N too low: Values below 8192 provide insufficient protection against modern GPUs
Ignoring timing attacks: Use constant-time comparison when verifying hashes
Forgetting to update: Rehash passwords with stronger parameters when users log in

⚙ Scrypt Parameter Reference Guide

Understanding these parameters is crucial for balancing security and performance. Here's what each one controls:

Parameter	Description	Recommended Value	Security Impact
`N`	CPU/Memory cost factor — must be a power of 2 (2¹⁰, 2¹⁴, 2²⁰, etc.)	16384 (2¹⁴) minimum	● Higher = exponentially more memory & time required
`r`	Block size — controls the sequential read size from memory	8 (standard)	● Higher = more memory bandwidth required (128 × N × r bytes)
`p`	Parallelization factor — number of independent mixing operations	1 (or 2-4 for multi-core)	● Higher = more CPU cores utilized, more total memory
`dkLen`	Derived key length — the size of your output hash in bytes	32 bytes (256 bits)	● Output size only — doesn't affect computation difficulty

📊 Memory Usage Formula: Total Memory = 128 × N × r × p bytes
Example: With N=16384, r=8, p=1 → Memory = 128 × 16384 × 8 × 1 = 16 MB per hash
💡 For production systems, aim for 100-500ms hash time to balance security and user experience.

📊 Scrypt vs Other Key Derivation Functions

How does scrypt compare to other popular password hashing algorithms? Here's a comprehensive comparison:

Algorithm	Memory-Hard	GPU Resistant	ASIC Resistant	Best Used For
🛡 Scrypt	✔ Yes	✔ Good	✔ Good	Password hashing, cryptocurrency mining, key derivation
🏆 Argon2id	✔ Yes	✔ Excellent	✔ Excellent	New applications, highest security requirements (PHC winner)
🔒 bcrypt	✘ No	✔ Moderate	⚠ Limited	Legacy systems, simple deployments, constrained environments
📜 PBKDF2	✘ No	✘ Weak	✘ Weak	FIPS/NIST compliance, legacy compatibility only

💡 Our Recommendation: Use Argon2id for new projects. Choose Scrypt when Argon2 isn't available or for cryptocurrency applications. Avoid PBKDF2 unless required for compliance.

🔗 Related Security Tools: 🏆 Argon2 / Bcrypt Generator 🔒 AES Encryption 📋 SHA-256 Hash ✅ Crypto Validator 💪 Password Strength