About Random Salt Generator
Random Salt Generator produces a fresh random value to use as a salt when hashing a password. Choose how many bytes you want and the page returns the salt written out in hexadecimal - sixteen bytes becomes a thirty-two character string such as 3f9c1e04b7a2d5816ce40f39ab721d55.
The randomness comes from the browser's cryptographic generator rather than the ordinary one used for games and demos. That generator is the same source the platform uses for keys and tokens, and it is the reason this tool exists separately from the general random string generator, where the output is not intended to be unpredictable.
Length runs from eight bytes to sixty-four, which covers the usual recommendations comfortably - sixteen is the common minimum and thirty-two is generous. The value is different every time you press the button, and nothing about it is stored between visits, which is what you want from a salt and also why it has to be copied somewhere safe as soon as it appears.
How to use Random Salt Generator
- 1 Set the length in bytes; sixteen is filled in to start with.
- 2 Generate the salt and copy the hexadecimal string it returns.
- 3 Store the salt beside the hash it belongs to, since it will be needed to check that hash later.
- 4 Generate a separate salt for every password rather than reusing one across accounts.
Frequently asked questions
How many bytes should I use?
Sixteen is a sound default and matches the common recommendation; thirty-two gives a comfortable margin and is still only sixty-four characters of text. Anything below about sixteen adds little, and the page will not go under eight in any case.
What should I do with the salt afterwards?
Record it. A salt is only useful if it can be found again when the stored hash is checked, so keep it beside the hash in your database or file. This page does not keep a copy, and the value is gone as soon as you navigate away or generate another one.
Can I get the same salt back if I lose it?
No. There is no history, no seed field and no saved list, so a lost salt means the hash it was used with can no longer be verified from the password. That is a property of salts rather than a shortcoming of this page, but it does mean the copying step is not optional.
Why is the output in hexadecimal rather than Base64?
Hex is the friendlier of the two to move between systems: it needs no escaping in a URL, an environment file or a SQL statement, and it is unaffected by case-insensitive comparisons. The trade-off is length - two characters per byte where Base64 uses about one and a third - so the string here is half again as long as the equivalent Base64 text.
Free, online, and private
Free to use
Random Salt Generator is completely free. There is no account to create, no login, and no hidden charge or usage limit.
Runs online in your browser
It is a free online tool that runs entirely in your browser. Nothing to download or install — open the page and start using it right away.
Your data stays private
All processing happens locally on your device. Your input is never uploaded, stored, or tracked, so it never leaves your browser.
How Random Salt Generator behaves in detail
These are the specifics of this implementation — the exact ranges, defaults and fixed settings you are working with.
| Parameter | Value |
|---|---|
| Input | a length field in bytes, defaulting to 16, with a declared floor of 8 and a ceiling of 64 |
| Length enforcement | the value is clamped again inside the run function, so a length outside 8 to 64 is silently pulled back into range |
| Randomness source | crypto.getRandomValues - the browser's cryptographically secure generator, not Math.random |
| Output encoding | lowercase hexadecimal, two digits per byte, so a 16-byte salt prints as 32 characters |
| Output shape | one unbroken lowercase string, with no prefix, no separator and no label for the algorithm it belongs with |
| History | a fresh value on every press - there is no stored value and no way to recall the previous salt |
Compiled from the implementation of this tool and checked against it by itoolnet.
What Random Salt Generator does not do
Knowing the edges of a tool saves more time than another list of its features. These are the cases where it will not do what you might expect.
- The salt is shown but never stored. Refreshing the page, pressing the button again or navigating away discards the previous value with no history, so the salt attached to an existing hash has to be copied out and kept somewhere else before the next run.
- There is no way to make a salt reproducible and no companion step. A salt exists to be recorded alongside a hash, and this page pairs it with nothing - it will not hash a password, will not run the derivation and offers no seed field, so a lost salt means the stored hash can no longer be checked.
- Output is hexadecimal only. Base64 and other encodings are not offered, which makes the string half again as long as the same bytes written in Base64URL, and the result carries no prefix or type marker to show what it is when it is found later out of context.
Tested and documented by itoolnet, the team that builds and maintains this site.