Password Generator
This tool generates strong passwords that are difficult to guess, brute-force, or crack. You can create either fully random passwords made of mixed characters, or memorable passphrases composed of real words joined together.
The generated output is intended for real-world use — such as account passwords, application secrets, API keys, or any scenario where security matters. All passwords are generated locally in your browser using cryptographically secure randomness, and nothing is stored or transmitted.
How Password Generation Works
In random mode, the tool builds a pool of allowed characters based on your selections — such as lowercase letters, uppercase letters, numbers, and symbols. A password of the chosen length is then generated using secure browser APIs designed for cryptographic use, not simple pseudo-random functions.
To avoid common weaknesses, the generator ensures that at least one character from each selected group is included. Optional substrings that you specify are preserved exactly as provided and included as whole units, rather than being broken into individual characters.
In memorable mode, the tool generates a passphrase by randomly selecting words from an internal word list and joining them together using a separator. This approach prioritizes memorability while still providing meaningful security when enough words are used.
Inputs and Options Explained
The tool gives you direct control over how passwords or passphrases are generated, without hiding important security decisions behind presets.
- Mode — Choose between random passwords and memorable passphrases depending on whether security or recall is the priority.
- Length / Words — Controls the total number of characters for random passwords, or the number of words used in a passphrase. Longer outputs provide significantly higher security.
- Character sets — Select which types of characters are allowed, such as letters, numbers, and symbols.
- Exclude ambiguous characters — Removes visually similar characters like O, 0, I, and l to reduce mistakes when typing.
- Include — Forces specific characters or substrings to appear exactly as entered, which is useful for meeting password policy requirements.
- Separator & capitalization — Controls how words are joined and formatted in memorable mode.
Examples and Edge Cases
A short random password with many character types may appear complex, but increasing length almost always provides a bigger security improvement than adding symbols alone. For example, a 16-character password using letters and numbers is often stronger than an 8-character password with every symbol type enabled.
In memorable mode, adding more words increases strength exponentially. A four-word passphrase is easier to remember but significantly weaker than a six-word one, even if both use the same separator.
Who Should Use This Tool
This password generator is designed for anyone who wants a practical balance between security, control, and clarity, without relying on opaque presets or external services.
- Developers generating credentials or API secrets
- Professionals securing work or personal accounts
- Users who prefer memorable but strong passphrases
- Anyone replacing weak or reused passwords
Related Concepts
Password strength is typically measured using entropy, which estimates how many guesses an attacker would need to find the correct value. Higher entropy means more resistance to brute force attacks, especially when passwords are stored using modern hashing techniques.
If you are working with authentication data or encoded values, you may also find the JWT Decoder or the Base64 Encoder & Decoder useful for inspecting related security artifacts.