Compare with and without salt
password = mypasswordsalt = abc123
Result: Two completely different hashes for the same password.
Salt Demonstrator
EDUCATIONAL DEMONSTRATION ONLY — A salt is random data added to a password before hashing. This demonstration shows how the same password produces completely different hashes with different salts, defeating precomputed rainbow table attacks. Always use unique, random salts in production.
Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
What is a rainbow table?
A rainbow table is a precomputed lookup table of hashes for common passwords. Salting defeats this because each salted hash is unique.
How should I generate salts?
Use a cryptographically secure random number generator. Each user should have a unique salt. Typical salt length is 16+ bytes.
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