16-byte hex salt
byteLength = 16format = hex
Result: A 32-character hex string (128 bits of entropy).
Salt Generator
Generate unique, random salts for use in password hashing. A salt is a random value added to a password before hashing, preventing rainbow table attacks. Each password should have a unique salt - this tool generates one salt at a time.
Privacy: this tool processes all data entirely in your browser. Passwords and hashes are never sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
Why do passwords need salts?
Salts prevent rainbow table attacks - precomputed hash tables that crack unsalted passwords instantly. With a unique salt per password, each password must be attacked individually, making bulk attacks infeasible.
How long should a salt be?
At least 16 bytes (128 bits). This is the NIST recommendation. Longer salts (32 bytes) provide extra margin but are rarely necessary.
Can I reuse a salt?
No. Every password must have its own unique salt. Reusing salts defeats the purpose - attackers can build rainbow tables for that specific salt.
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