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Password Generator: Create Strong, Random Passwords
A password generator creates random passwords from the characters you choose, so you do not have to invent one that humans tend to make predictable. The WritoryBuzz tool builds passwords, passphrases and PINs in your browser using the Web Crypto API, shows strength and entropy in bits, and never sends the result to a server.
Generate a strong password now or read how password strength really works, and what to do with the password once you have it.
Use the toolQuick start
1Pick a mode
2Set the length
3Choose character sets
4Click Generate Password
Click Generate Password
Strength: -Entropy: 0 bits
16 characters
4 words
6 digits
Bulk Password Generation
Generatepasswords
Click "Generate All" to create multiple passwords at once...
for important accounts and 20 or more for email, banking and your password manager. Never reuse a password. One password per account. Store it in a password manager, and turn on two-factor authentication. This tool: random, memorable and PIN modes, bulk generation, entropy shown in bits.
What Is a Password Generator?
A password generator uses a random number source to pick each character of a password, instead of a person choosing it. Human choices follow patterns such as names, dates and keyboard walks, and attackers try those patterns first. A generated password has no pattern to guess.
The live tool runs in your browser and draws its randomness from window.crypto.getRandomValues, the cryptographically secure random source built into modern browsers. It does not use Math.random, which is not designed for security. The generated text stays on your device and is not transmitted.
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How to Use the Password Generator
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1STEP 1 Pick a mode. Random gives a string of characters. Memorable gives a passphrase that is easier to type. PIN gives digits only.
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2STEP 2 Set the length. The slider shows the number of characters. Start at 16.
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3STEP 3 Choose character sets. Tick uppercase, lowercase, numbers and symbols. Tick Exclude Ambiguous to drop look-alike characters (0, O, l, I, 1).
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4STEP 4 Click Generate Password. The result appears with a strength label and an entropy figure in bits.
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5STEP 5 Copy it. Use the copy button and paste it straight into a password manager.
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6STEP 6 Need many? Use Bulk Password Generation to create a list at once, then Copy All.
Expert tip
Use the tool
Do not retype the password from the screen. Copy it into your password manager the moment you generate it, then close the tab.
Password Entropy Explained in Plain English
Entropy measures how many guesses an attacker would need, expressed in bits. Each added bit doubles the work. The formula is simple: entropy equals password length multiplied by log base 2 of the number of possible characters.
A password using all four character sets has about 94 printable characters to choose from, which is roughly 6.55 bits per character. Sixteen characters gives about 105 bits, which matches the figure the tool displays for a 16-character mixed password.
| Length | Character set | Approx. bits | Verdict |
|---|---|---|---|
| 8 | Numbers only (10) | About 27 | Never use |
| 8 | Mixed (94) | About 52 | Avoid |
| 12 | Mixed (94) | About 79 | Minimum |
| 16 | Mixed (94) | About 105 | Recommended |
| 20 | Mixed (94) | About 131 | Ideal for sensitive accounts |
These figures hold only when characters are chosen truly at random. A password you invented, such as Tomorrow@2026, may look long but has far less real entropy, because attackers guess common words and patterns first.
Length Beats Complexity
Adding length helps far more than adding symbols. Going from 8 to 12 mixed characters adds about 26 bits. Adding a symbol set to a 12-character password of letters and numbers adds only about 7 bits. NIST SP 800-63B, the US digital identity guideline, accordingly recommends supporting long passwords and screening against known breached passwords, and it advises against forced composition rules and routine periodic changes.
So choose the longest password the site allows, within reason. If a site caps length at 12, use 12 random mixed characters and rely on two-factor authentication for extra protection.
Random, Memorable and PIN Modes
| Mode | What you get | Best for |
|---|---|---|
| Random | A string of letters, numbers and symbols | Anything stored in a password manager |
| Memorable | A passphrase made of words, easier to read and type | A manager master password, a device login you must type |
| PIN | Digits only | Device locks and places that accept only numbers |
A passphrase of several random words can be both strong and typeable. Strength comes from the number of words and from the words being truly random, not from a quote or lyric you like. A PIN has very small entropy, so it only works where attempts are limited, such as a phone lock.
Banks and UPI apps ask you to set your own PIN inside their app, so use a generated PIN for devices and services that let you choose, and never share any PIN or OTP with anyone.
How Passwords Actually Get Cracked
| Attack | How it works | What stops it |
|---|---|---|
| Brute force | Tries every combination | Length |
| Dictionary attack | Tries words, names and common passwords first | Randomness |
| Credential stuffing | Re-uses passwords leaked from one site on other sites | A unique password per account |
| Phishing | Tricks you into typing it into a fake page | Two-factor authentication and checking the address |
| Rainbow table | Looks up pre-computed hashes | Length and site-side salting |
No generator defends against phishing or a site leaking its own database. That is why unique passwords and two-factor authentication matter as much as strength.
Common Weak Password Patterns
- Keyboard walks such as qwerty123 or 1qaz2wsx.
- Leetspeak swaps such as P@ssw0rd!. Cracking tools try these substitutions automatically.
- Personal details: birth year, pet name, phone number, company name plus a year.
- Sequences and repeats: abc123, 111111, or one base password with a number added per site.
- One password everywhere. A single leak exposes every account that shares it.
Password Generator Use Cases
Changing a breached password
Replace it with a new random one, then change it on any site that shared it.
Wi-Fi router and guest networks
A long random key is far safer than a street name. You can print it as a code with the QR code generator.
Teams and IT admins
Bulk mode produces starter passwords for staff accounts that must be changed at first login.
Developers and testers
Create secrets and test credentials. For dummy payment data use the credit card generator, and tidy output with the JSON formatter.
How to Store Your New Password
- 1Use a reputable password manager so you remember one strong master passphrase only.
- 2Turn on two-factor authentication on email, banking and the password manager itself. An authenticator app or hardware key is stronger than SMS codes.
- 3Never keep passwords in a notes app, spreadsheet or email to yourself.
- 4Check each account for a recovery option and keep it secure too.
Common Mistakes
- Shortening the password because the site is annoying. Raise length first.
- Removing symbols and keeping 8 characters. That cuts entropy sharply.
- Re-generating until you find one you like. Choosing among outputs adds bias. Use the first result.
- Sending a password over chat or email. Share through your manager's secure share feature instead.
- Using Exclude Ambiguous when it is not needed. It slightly lowers entropy. Turn it on only when someone will read the password aloud or type it from print.
Limits and Honest Notes
- A generator creates the password. It cannot store it, check whether a site leaked it or protect you from phishing.
- The strength label is an estimate from length and character types. It does not check dictionaries or breach lists.
- A site that stores passwords poorly can still expose a strong password. Unique passwords limit the damage.
- Bulk lists live on your screen only. Save them securely straight away.
Privacy
Generation happens in your browser with the Web Crypto API and the live page states that nothing is transmitted. As with any online tool, use a trusted device and a current browser, and avoid browser extensions you do not trust that can read page content.
Frequently Asked Questions
How long should a password be?
At least 16 characters for important accounts, and 20 or more for email, banking and your password manager. Length adds more security than symbols do.
Is this password generator safe?
It generates passwords in your browser using window.crypto.getRandomValues and does not send them to a server. You should still save the result in a password manager and not paste it into untrusted places.
What is password entropy?
Entropy is a measure of unpredictability in bits. Each extra bit doubles the number of guesses needed. A 16-character random password using all character types has about 105 bits.
What is better, a random password or a passphrase?
Use random passwords for anything a password manager fills in for you. Use a passphrase of several random words for the few things you must type from memory, such as your manager's master password.
Should I use symbols?
Symbols help, but length helps more. If a site allows it, choose a longer password first, then add symbols if the site requires them.
Do I still need two-factor authentication?
Yes. A strong password does not protect you from phishing or a leaked database. Two-factor authentication adds a second barrier on email, banking and social accounts.
How often should I change passwords?
Change one when you suspect a leak or after a breach alert, not on a fixed schedule. NIST SP 800-63B advises against forced periodic changes.
What does Exclude Ambiguous do?
It removes characters that look alike, such as 0 and O, or l, I and 1. It is useful when a password will be read aloud or typed from print.
Can I generate many passwords at once?
Yes. Bulk generation creates a list of passwords in one click, and Copy All puts them on your clipboard. Store them securely at once. Generate a strong password Setting up guest WiFi? Turn the new password into a scannable code with the QR code generator.
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