What Is a Password Generator?
A password generator is a tool that creates random, unguessable strings of characters (or words) suitable for use as account passwords, encryption keys, or shared secrets. The whole point is that humans are bad at randomness — we pick birthdays, pet names, common substitutions like "@" for "a" — and attackers know it. A generator that uses a cryptographically-secure random source produces strings that resist both common-password lists and exhaustive guessing within practical timeframes.
The audience is anyone managing more than a handful of accounts: anyone signing up for a new SaaS service, developers creating API keys and database passwords, IT admins rotating service credentials, security teams issuing one-off shared secrets, and ordinary users following best-practice advice from password managers (1Password, Bitwarden, KeePass). The Tooldit generator uses your browser's WebCrypto random source — the same one TLS uses — and runs entirely client-side, so the password is never transmitted or stored on a server.
A Strong Password Generator That Runs Entirely in Your Browser
This password generator builds long, unpredictable passwords using your browser's built-in cryptographic randomness, so every result is genuinely hard to guess. Reusing the same memorable password across sites is the single most common way accounts get compromised — one leaked database exposes every account that shares that password. The fix is a unique, random password for each login, and that is exactly what this tool produces. Set a length, choose which character types to include, and a fresh password appears instantly. Nothing you generate is uploaded, saved, or tracked.
How the Generator Works
The controls are deliberately simple, and the password updates the moment you change any of them:
- Length slider — drag from 4 up to 64 characters. The slider starts at 16, a strong everyday default, and the current value is always shown next to it.
- Character-set toggles — switch on or off lowercase (a–z), uppercase (A–Z), digits (0–9), and symbols (!@#$%^&*…). The generator guarantees at least one character from every set you enable, then shuffles everything so no type clusters at the start.
- Exclude ambiguous — strips look-alike characters such as 0/O and 1/l/I so a password is easy to read off a screen or copy by hand without second-guessing.
- Strength meter — six bars and a label (Weak through Excellent) rate the current password on length and character variety as you adjust settings.
- Copy and regenerate — the Copy button places the password on your clipboard, and the refresh icon rolls a brand-new one with the same settings.
Why Use This Tool
- Stays on your device — the password is created in the page you're reading and never travels over the network.
- Cryptographically random — it draws from the secure crypto API, not the predictable Math.random.
- Completely free — generate as many passwords as you want, with no daily cap.
- No sign-up — no account, no email, no card; the tool just works.
- Nothing to clean up afterward — nothing is logged or stored, so there is no history for anyone to leak.
When This Comes in Handy
- Signing up for a new account and want a unique password to paste straight into a password manager.
- Rotating a leaked or reused password after a breach notification, replacing it with something nothing else shares.
- Setting up Wi-Fi or a router where you turn on "Exclude ambiguous" so the key is easy to type on a phone keypad.
- Generating API keys, database passwords, or service credentials during development that need to be long and symbol-heavy.
Once you have a password, pair it with the Hash Generator if you need a one-way digest, or explore the rest of the developer tools for more in-browser utilities.
Password Generator vs Other Tools
Versus password-manager built-in generators (1Password, Bitwarden, KeePass) — if you use a password manager, its generator is the right primary tool because it stores the new password alongside the credential. Tooldit is the right backup when you need a strong password before signing up for the manager, or for a one-off shared secret.
Versus other online generators — many online generators run server-side, which means your new password briefly exists on someone else's machine. Even with a trustworthy operator, that's an unnecessary risk. Tooldit's generator runs entirely in your browser using WebCrypto; the password never leaves your device.
Versus a self-built generator (Math.random) — JavaScript's Math.random is not cryptographically secure — the sequence can be predicted from a few outputs. The Tooldit generator uses crypto.getRandomValues, the secure equivalent.
Versus diceware or memorable passphrases — passphrases (correct-horse-battery-staple style) are easier to type and remember; random character strings are denser per character. Tooldit can produce both styles depending on options.
Troubleshooting & Common Issues
- Site rejects my generated password — some sites have arbitrary rules (no special characters, max length 20, must include a number). Toggle the character-set options to match the site's requirements before generating.
- Generated password is hard to type on mobile — mixed case + special characters require multiple keyboard switches. For mobile-typed passwords, increase length and use lowercase + digits only, or use a passphrase-style output.
- Password manager autofill broke after rotation — some sites require you to save the new password in the manager BEFORE submitting the change form; others auto-save on submit. If autofill stops working, manually edit the saved entry.
- Copy button doesn't copy on iOS — some older iOS Safari versions block clipboard writes outside a user gesture. Tap the password text and copy manually, or use share-sheet to paste into another app.
- Same password generated twice — mathematically possible but astronomically unlikely for any reasonable length. If you see a repeat, regenerate; the chance of a genuine collision at 12+ random characters is effectively zero.
- Need to share the password securely — never send via plain email or SMS. Use a password manager's share feature, a one-time-secret service, or an encrypted message in Signal/WhatsApp.
Frequently Asked Questions
+Is this password generator actually random and secure?
Yes. Every character is chosen with the browser's crypto.getRandomValues API, the same cryptographically secure source used for encryption keys. It is not the predictable Math.random function. The tool also guarantees at least one character from each set you enable, then shuffles the result so the required characters are not stuck at the front.
+Does Tooldit see or store the passwords I generate?
No. The password is built entirely inside your browser tab and is never sent anywhere. There is no account, no logging, and no network request when you generate or copy a password. You can confirm this by opening your browser's network tab while you use the tool.
+How long should my password be?
For most accounts, 16 characters with a mix of cases, digits, and symbols is a strong default, which is why the slider starts there. You can set anything from 4 to 64 characters. For high-value accounts like email, banking, or a password manager master password, 20 or more characters is a safer choice.
+What does the "Exclude ambiguous" option do?
It removes characters that are easy to mistake for one another when reading or retyping a password by hand, such as the digit 0 and capital O, or the digit 1, lowercase l, and capital I. Turn it on for passwords you may need to read off a screen or write down; leave it off for passwords you will only copy and paste.
+What do the strength bars and label mean?
The six bars and the Weak through Excellent label score the current password on length and variety. You earn points for reaching 8, 12, and 16 characters, for mixing uppercase with lowercase, for including digits, and for including symbols. It is a quick visual cue, not a guarantee, so longer and more varied is always better.
+How long should my password be?
For most accounts, 16+ random characters from a mixed alphabet is comfortably secure against exhaustive guessing. For high-value secrets (encryption keys, master passwords) aim for 20+. Length matters more than symbol variety: a 20-character lowercase string is harder to guess exhaustively than a 12-character mixed one.
+Are random characters better than passphrases?
For equivalent entropy, both are equally strong. A 4-word random passphrase like "rocket spinach ledger truffle" has comparable entropy to a 12-character random string and is far easier to remember and type. Pick passphrases for things you type manually; random strings for things stored in a password manager.
+How often should I rotate passwords?
Modern guidance (NIST 800-63B) is: rotate only after a known compromise, not on a schedule. Forced periodic rotation just trains users to pick weaker passwords with small variations. Use strong unique passwords from the start and you rarely need to rotate.