Tool guide
How to use the Password Generator
A useful password generator should make its randomness, character rules, and limits clear. This tool generates passwords inside the browser with window.crypto.getRandomValues, uses rejection sampling for unbiased character indexes, places at least one character from every enabled group, fills the remaining positions from the combined pool, and securely shuffles the completed characters. If Web Crypto is unavailable, it refuses to generate a password rather than substituting the non-cryptographic Math.random function.
People also use this tool for
People also use this password generator to create long random passwords for email, social media, banking, shopping, work accounts, admin panels, Wi-Fi, temporary access, test accounts, database users, and any service where a unique password stored in a password manager is safer than reusing or slightly changing an old password.
What this tool is useful for
- Create one or several random passwords from 8 to 128 characters for accounts, temporary credentials, Wi-Fi, admin tools, test systems, and password-manager entries.
- Enable only the character groups accepted by a particular website, customize the permitted symbols, and remove visually ambiguous characters when a password must be typed manually.
- Generate locally without sending the selected settings or generated output to a password-generation backend.
Practical example
If you request a 20-character password with lowercase, uppercase, numbers, and symbols enabled, the generator first selects one random character from each of those four groups, fills the other 16 positions from the complete enabled pool, and then shuffles all 20 positions. Guaranteeing group coverage helps with websites that impose composition rules, but length, randomness, uniqueness, secure storage, and the website's own defenses matter more than simply counting character types.
Helpful tips
- Prefer at least 16 random characters when a service permits them, and never shorten a password merely to make it easier to memorize if a password manager can store it.
- Use a different generated password for every account. Reusing one strong password allows one breach to threaten several accounts.
- Store generated passwords in a reputable password manager and protect the vault with a strong master passphrase and multi-factor authentication when available.
- Character-type requirements vary by service. If a website rejects a password, adjust only the relevant length or symbol setting rather than weakening every setting.
- Excluding ambiguous characters makes manual entry easier but slightly reduces the available character pool. Increasing length easily compensates for that practical tradeoff.
- The copy action places the password on the device clipboard, where it may remain accessible to clipboard history, extensions, applications, or another person using the device.
Related tools and next steps
Random Number Generator, Username Generator, Custom Random Generator, Random Letter Generator, Random Generators
Common questions this tool can help answer
Common password questions this generator can help answer
- How can I create a long random password?
- Does every selected character type appear?
- What password length should I use?
- Can I exclude confusing characters?
- Are passwords generated in my browser?
- Why should every account have a different password?
- Where should I store generated passwords?
Sources and methodology
The formulas, standards, and reference information on this page are checked against the authoritative sources below. External references open the original source.
- NIST SP 800-63B: Password authenticator guidance
- CISA: Use strong passwords
- NIST Digital Identity Guidelines FAQ: Password managers
- MDN: Crypto.getRandomValues()
Frequently asked questions
How are the passwords generated?
The tool uses window.crypto.getRandomValues to obtain cryptographically strong browser-generated values, maps them to character positions with rejection sampling, and shuffles each completed password. It does not use Math.random for password generation.
Does every selected character type appear?
Yes. Each password receives at least one random character from every enabled and nonempty group, then receives additional characters from the combined pool before all positions are shuffled.
What password length should I choose?
CISA recommends passwords that are at least 16 characters, while current NIST guidance requires at least 15 characters for passwords used as a single authentication factor and says services should permit at least 64. Choose 16 or more when possible, or follow a stricter service-specific requirement.
Do numbers and symbols automatically make a password strong?
No. They expand the possible character pool, but length, unpredictable generation, uniqueness, safe storage, rate limiting, breach detection, and multi-factor authentication all matter. A short patterned password can remain weak despite containing every character type.
Why does NIST discourage mandatory composition rules?
Current NIST guidance tells password verifiers not to force mixtures of character types because users often respond with predictable patterns. This generator still offers those groups for random generation and compatibility with websites that impose their own rules; enabling a group is not itself a strength score.
Are generated passwords sent to WOW Webtools?
The generator is a client-side component and creates the output in the browser without sending it to a password-generation backend. Your browser, device, installed extensions, clipboard manager, and screen environment remain part of your security boundary.
What happens if secure browser randomness is unavailable?
The tool displays an error and generates nothing. It deliberately does not fall back to Math.random because MDN identifies Math.random as unsuitable for security-related randomness.
What are ambiguous characters?
Characters such as uppercase O, zero, lowercase o, uppercase I, lowercase l, one, and the vertical bar can look alike in some fonts. Excluding them reduces transcription mistakes when a password must be read or typed manually.
Can I generate several passwords at once?
Yes. Select a quantity from 1 to 25. Each line is generated separately, but you should still assign only one password to each account and save the account-to-password mapping safely in a password manager.
Does the generator check whether a password appeared in a breach?
No. It creates new random strings but does not submit them to a breach database. A sufficiently long newly generated password is unlikely to match a human-chosen password, but the tool does not provide a breach-check result.
Should I copy or download generated passwords?
A password manager is usually the safest destination. Copying is convenient, but clipboard history or other software may retain the value. A downloaded plain-text file can expose every saved password unless the device and file are protected.
Should I change passwords on a fixed schedule?
NIST advises services not to require arbitrary periodic changes and instead to force a change when compromise is suspected or known. Always replace reused, exposed, shared, or breached passwords immediately.
https://wowwebtools.com/random-generators/password-generator