Password Generator

Generate output free online with Password Generator. Browser-based, no signup, no installation — instant results for security teams.

Password Generator is a free browser-based tool that creates strong, random passwords tailored to your specific security requirements. You can configure the password length, choose which character sets to include (uppercase letters, lowercase letters, numbers, and special symbols), and generate as many unique passwords as you need. Every password is produced using the Web Crypto API, which provides cryptographically secure random values rather than the weaker pseudo-random number generators found in standard math libraries. Password strength is measured in bits of entropy, which represents the number of possible combinations an attacker would need to try in a brute-force scenario. A 12-character password using all four character sets (uppercase, lowercase, digits, and symbols from a 95-character pool) provides approximately 79 bits of entropy. Increasing the length to 16 characters raises that to roughly 105 bits. For context, current security recommendations generally consider 80 bits or more to be strong for most online accounts. The National Institute of Standards and Technology (NIST) updated its password guidelines in Special Publication 800-63B to emphasize length over complexity. NIST recommends allowing passwords of at least 8 characters and ideally supporting up to 64 characters or more. The guidelines also discourage forced periodic password changes, noting that this practice often leads users to make minimal, predictable modifications. Instead, NIST advises checking new passwords against known compromised password lists and encouraging the use of passphrases or randomly generated passwords. Password reuse remains one of the most common and dangerous security practices. When a single service suffers a data breach, attackers use credential-stuffing tools to try the leaked username and password combinations across thousands of other websites. If you reuse the same password for your email, banking, and social media accounts, a breach on any one of those services puts all the others at risk. Generating a unique random password for every account eliminates this vulnerability entirely. The character set you choose directly affects password strength. Using only lowercase letters gives you a pool of 26 characters per position. Adding uppercase letters doubles that to 52. Including digits raises it to 62, and adding symbols from the standard keyboard set pushes the pool to approximately 95 characters. Each additional character type increases the entropy per character, making the password exponentially harder to crack. All password generation in this tool happens locally in your browser. No passwords are transmitted to any server, stored in any database, or logged in any analytics system. The generated output exists only in your browser's memory until you copy it or navigate away. This architecture ensures that your passwords remain private from the moment they are created. For maximum security, pair this tool with a reputable password manager that can store and auto-fill your unique passwords across all your devices.

• Cryptographic Randomness. Uses the Web Crypto API for true cryptographic random number generation, ensuring passwords are unpredictable and resistant to all known attack patterns.
• Customizable Character Sets. Toggle uppercase letters, lowercase letters, numbers, and symbols independently to match the requirements of any service or security policy.
• Adjustable Length. Set password length from 4 to 128 characters to meet any requirement, from simple PINs to high-security administrative passphrases.
• Entropy Estimation. Displays the approximate entropy in bits for each generated password so you can assess its strength against brute-force attacks at a glance.
• One-Click Copy. Copy the generated password to your clipboard with a single click, minimizing the risk of transcription errors when transferring to a password manager.
• Zero Server Communication. All processing occurs locally in the browser. No passwords are transmitted, stored, or logged on any external server at any point.

• Creating unique passwords for each online account. Eliminate credential-stuffing risk by ensuring every service uses a different, randomly generated password.
• Meeting corporate password policy requirements. Generate passwords that satisfy minimum length, complexity, and character diversity mandates set by IT security teams.
• Provisioning temporary access credentials. Create strong temporary passwords for guest accounts, contractor access, or one-time system configurations.
• Generating API keys and secret tokens. Produce high-entropy random strings suitable for API authentication, webhook secrets, and encryption key material.

1. Set the desired password length — Use the length slider or input field to choose how many characters your password should contain. A minimum of 12 is recommended.
2. Select character sets — Enable or disable uppercase letters, lowercase letters, numbers, and special symbols based on your needs and the target system's requirements.
3. Generate the password — Click the generate button to produce a new random password using the selected configuration. The result appears immediately.
4. Review the strength indicator — Check the entropy estimate and strength rating to confirm the password meets your security threshold before using it.
5. Copy and store securely — Use the copy button to place the password on your clipboard, then paste it into your password manager or the account registration form.