Strong Password Generator API

Generate cryptographically secure passwords up to 128 characters. Custom character sets, ambiguous-character filter, strength meter. 100% client-side.

The Strong Password Generator is also available as a free REST API. Send a POST request with a JSON body to https://dot.tools/api/tools/pwd-gen — no authentication, no API key, CORS enabled. Successful calls return { "ok": true, "result": { … } }; failures return HTTP 400 or 422 with an error body.

Request body

Field	Type	Required	Description
`length`	integer	required	Password length (8–128 characters).
`lowercase`	boolean	required	Include lowercase letters (a–z).
`uppercase`	boolean	required	Include uppercase letters (A–Z).
`digits`	boolean	required	Include digits (0–9).
`symbols`	boolean	required	Include symbols (!@#$%^&*…).
`excludeAmbiguous`	boolean	required	Exclude ambiguous characters (I, l, 1, O, 0).
`count`	integer	required	How many passwords to generate (1–20).

Response

Field	Type	Required	Description
`passwords`	string[]	required	The generated passwords.
`entropyBits`	number	required	Entropy in bits of each generated password given the chosen settings.

Example request

curl -X POST https://dot.tools/api/tools/pwd-gen \
  -H 'Content-Type: application/json' \
  -d '{
  "length": 20,
  "lowercase": true,
  "uppercase": true,
  "digits": true,
  "symbols": true,
  "excludeAmbiguous": false,
  "count": 6
}'

Sample response

{
  "ok": true,
  "result": {
    "passwords": [
      "?p[(W6@+TiRAo?86S<V4",
      "1fCKufJu)yu4-fa^adY1",
      "9H&@NnkTO4PSw=piUQ&O",
      "ew^2!iql{T&*FQ]=Hm0<",
      "+}>RXWNG49^*P#WfgTo6",
      "f%!U7vYt5pWO!N>I-&pK"
    ],
    "entropyBits": 127.5
  }
}

Use the free Strong Password Generator in your browser, read the Strong Password Generator guide, or import the full OpenAPI specification.