Password Generator
Create a strong, random password. Choose the length and character types, then copy it. Passwords are generated securely in your browser and never leave your device.
Reviewed by the ToolNestr Editorial Team — July 2026
—
How strong passwords are generated
Strong passwords are generated using a cryptographically secure random number generator (crypto.getRandomValues()), which produces unpredictable, unbiased random values suitable for security-sensitive applications.
The tool builds a character pool from your selected types (lowercase, uppercase, numbers, symbols), then randomly picks characters from that pool for each position until the chosen length is reached. The optional "avoid ambiguous" filter removes look-alike characters (l, 1, I, O, 0) for better readability.
Worked example
Generating a 16-character password using all character types.
About this password generator
Reusing simple passwords is one of the biggest security risks online. This generator creates strong, unique, random passwords using your browser's secure random number generator — so nothing is ever transmitted or stored. Pick a length, choose which character types to include, and copy your new password straight into a password manager. Generate a random numeric code with the Random Number Generator, or share a link securely via the QR Code Generator.
How to use it
- Set the length (12–16+ is recommended).
- Choose which character types to include.
- Click ↻ for a new password and "Copy" to grab it.
- Store it safely — ideally in a password manager.
When to use this tool
Strong passwords are essential for protecting your online accounts, yet most people still use weak or reused passwords out of convenience. Use this generator whenever you're creating a new account, updating an old password, or setting up a service that requires a secure credential. IT administrators generate temporary passwords for new employees. Developers create secure API keys and application secrets. Anyone concerned about their digital security should use a unique, strong password for every site and service.
What different password strength levels mean
Password strength is determined by length and the number of character types used. Here is how each level maps to real-world security.
Software Developer
Generates secure API keys, database credentials, and application secrets that need to be cryptographically strong.
Small Business Owner
Creates strong passwords for admin panels, social media accounts, and business email to prevent unauthorised access.
IT Administrator
Provisions temporary secure passwords for new employee accounts, service accounts, and system access credentials.
Privacy-Conscious User
Replaces weak reused passwords across personal accounts with unique strong passwords for better online security.
| Strength Level | Length | Character Types |
|---|---|---|
| Very strong | 16+ characters | All 4 types required |
| Strong | 12–15 characters | At least 3 types |
| Fair | 8–11 characters | At least 2 types |
| Weak | 6–7 characters | 1–2 types |
| Very weak | Under 6 characters | Single type only |
| Not recommended | Any length | Dictionary words or patterns |
How to use the password generator
Choose your length
Drag the slider to set a password length between 4 and 64 characters. 16+ is recommended.
Select character types
Tick the character sets to include — lowercase, uppercase, numbers, and symbols for maximum security.
Copy and store safely
Click Copy to grab the password, then save it immediately in a password manager.
Tips for password security
Never reuse passwords
Each account should have a unique password. If one service is breached, reused passwords put all your other accounts at risk.
Use a password manager
Password managers generate, store, and auto-fill strong passwords for every site. You only need to remember one master password.
Enable two-factor authentication
A strong password is your first defence. Adding 2FA provides a second layer of protection against unauthorised access.
Frequently asked questions
Are these passwords safe to use?
Yes. They’re generated using your browser’s cryptographically secure random generator, and nothing is sent to any server or saved anywhere.
What makes a strong password?
Length matters most. Aim for at least 12–16 characters and mix uppercase, lowercase, numbers and symbols.
What does "avoid ambiguous characters" do?
It removes look-alike characters such as l, 1, I, O and 0, so the password is easier to read and type correctly.
Is the password stored anywhere?
No. Once you leave or refresh the page it’s gone. Save it somewhere safe, ideally a password manager.
How is the password strength determined?
Strength is based on length and character variety. A score from "Very weak" to "Very strong" helps you gauge how secure the password is at a glance.
What length should I choose?
16 characters or more is recommended for strong security. For most purposes, 12 characters with mixed character types is a good minimum.
Should I use symbols in my passwords?
Yes — including symbols significantly increases the number of possible combinations, making the password much harder to crack.
Can I generate multiple passwords at once?
The generator creates one password at a time. Click the refresh button to generate a new one instantly.
How does the "Avoid ambiguous" option help?
Characters like l (lowercase L), 1 (one), I (uppercase i), O and 0 (zero) look similar. Removing them prevents transcription errors when copying or reading the password aloud.
Should I use a password manager with generated passwords?
Absolutely. A password manager securely stores all your unique passwords and auto-fills them, so you only need to remember one master password.