Tool
What the Salt Generator does
Salt Generator: generates Salt (hex) from Length. Example: length 32 gives salt (hex) 37bdcfe25c3c362be5bbfdf22a08314a.
Point it at Length and it returns Salt (hex). Enter what you need and trigger it when you are ready.
Randomness quality matters here in a way it does not for most tools. The Salt Generator exists to take that particular chore off your hands.
This runs client-side, which means we never receive what you enter and could not retrieve it if asked.
The sections that follow cover the fields, the method, and one full example computed from the defaults.
What do the Salt Generator fields mean?
The Salt Generator uses 1 input. Starting values are already in place, which saves the usual blank-form hesitation about what a field wants.
| Field | What to enter | Default |
|---|---|---|
| Length | accepts 8 to 256 | 32 |
How does the Salt Generator work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same generated output.
Nothing is computed until the inputs pass their checks, so you will not get a confident answer built on a typo.
Worked example
These are the values the Salt Generator loads by default, and the result it produces from them. The figures are the tool’s live defaults and its live output, so you can reproduce them exactly.
| Length | 32 |
|---|
| Salt (hex) | 37bdcfe25c3c362be5bbfdf22a08314a |
|---|
What a salt actually defends against
A salt is a random value combined with a password before hashing, specifically so that two identical passwords hash to two different values. This tool outputs 32 hex characters by default: 128 bits, more than enough for the job.
Worth knowing
- The entire point of a salt is defeating precomputation: without one, an attacker can build a rainbow table of hash-to-password mappings once and reuse it against every leaked database that ever surfaces. A unique salt per password makes that precomputation worthless.
- If a system uses bcrypt, scrypt or Argon2 correctly, it does not need this tool at all. Those functions generate and manage their own random salt internally, bundled with the resulting hash string. This generator is for custom schemes (HMAC-based systems, per-record encryption) that need an explicit salt value of their own.
- A salt does not need to be secret, only unique per password. It is normally stored right alongside the hash. Reusing the same salt across multiple passwords defeats the entire purpose, even when the salt itself is high-entropy.
- A salt is not a pepper. A pepper is a single secret value shared across every password and kept outside the database (an environment variable or an HSM), which protects against a database-only leak in a way a stored, non-secret salt cannot.
How to use it
- Enter Length (8 to 256).
- Press Generate.
- You get Salt (hex) back.
- The link encodes your inputs, so saving it is enough to reproduce the result later.
What this tool does not do
- Randomness comes from your browser cryptographic source, which is suitable for real secrets.
- Randomness comes from your browser's cryptographic random source, which is suitable for passwords and keys.
- It does not account for anything you did not enter, by definition.
- Results are only as good as the inputs. Check your units before reading anything into the output.
Frequently asked questions
Just Length. Defaults are loaded for all of them, which makes it easy to isolate the effect of a single variable.
Length accepts 8 to 256. Out-of-range entries are refused up front, which is safer than silently clamping them.
With the values loaded when the page opens, salt (hex) comes out as 37bdcfe25c3c362be5bbfdf22a08314a. That number tracks the inputs, so a small edit shows its sensitivity immediately.
It is not stored or transmitted. The calculation happens locally and leaves no trace with us.
Free, and there is no upsell. The whole tool is the free version.
The output is deterministic. The same inputs always give the same answer, and the method is documented above so you can check it.