Utility Tools
Password Generator — Custom Length with Weak/Medium/Strong Label
Generate random passwords free from 4–128 characters with uppercase, lowercase, numbers & symbols. Math.random, length-only strength label — create one now.
TL;DR: Slide password length from 4 to 128, toggle four character-set checkboxes (uppercase, lowercase, numbers, symbols), click Generate Password, and copy the result — strength shows Weak, Medium, or Strong based on length only, using Math.random not crypto.
Reviewed by FYN Tools Editorial · Guides ·
Privacy & processing: 100% client-side browser processing — passwords are built character by character with Math.random. The Weak/Medium/Strong label reflects length only, not entropy analysis, and this is a generator not a strength checker for existing passwords.
Password Generator
Generate random passwords free from 4–128 characters with uppercase, lowercase, numbers & symbols. Math.random, length-only strength label — create one now.
- Inputs
- Length slider (4–128) and four checkboxes: uppercase, lowercase, numbers, symbols
- Outputs
- A single random password string with a length-based Weak/Medium/Strong label
- Processing
- Client-side (browser Math.random)
- Limits
- At least one character type must be selected; uses Math.random (not crypto.getRandomValues); strength label is length-only (<6 Weak, <10 Medium, else Strong)
Quick steps
- Drag the Password Length slider between 4 and 128.
- Check or uncheck Uppercase, Lowercase, Numbers, and Symbols.
- Click Generate Password.
- Read the Weak, Medium, or Strong label (based on length only).
- Click Copy on the generated password.
- Click Generate again for a new password with the same settings.
- Length range 4–128
- Uppercase, lowercase, numbers, symbols checkboxes
- Math.random character selection
- Length-based Weak/Medium/Strong label
- Copy button on result
Data input / output
| Inputs | Length slider (4–128) and four checkboxes: uppercase, lowercase, numbers, symbols |
|---|---|
| Outputs | A single random password string with a length-based Weak/Medium/Strong label |
| Formats | Plain text password (copyable) |
| Limits | At least one character type must be selected; uses Math.random (not crypto.getRandomValues); strength label is length-only (<6 Weak, <10 Medium, else Strong) |
| Processing | Client-side (browser Math.random) |
How to Use the Password Generator
- Drag the Password Length slider between 4 and 128.
- Check or uncheck Uppercase, Lowercase, Numbers, and Symbols.
- Click Generate Password.
- Read the Weak, Medium, or Strong label (based on length only).
- Click Copy on the generated password.
- Click Generate again for a new password with the same settings.
What is a Password Generator?
Adjust the length slider from 4 to 128 characters and choose which character sets to include: uppercase A–Z, lowercase a–z, numbers 0–9, and symbols like !@#$%. Each click of Generate Password picks random characters from the combined pool using Math.random.
A shield icon shows Weak (under 6 characters), Medium (6–9), or Strong (10+) — that label depends only on length, not on how many character types you enabled. This tool creates new passwords; it does not score or audit passwords you already have.
The generator concatenates enabled character pools, then loops length times picking Math.floor(Math.random() * pool.length) for each position. If no checkbox is selected, a toast blocks generation. The result appears with a copy button and the length-based strength text.
How it works
Password Generator reads your input from the panel above, applies length range 4–128, and shows a result you can copy or download. Options stay visible so you can iterate without reloading the page.
Hash passwords with our Hash Generator.
Common Use Cases & Examples
- Test account signup: Generate a 16-character password with all four character types for a staging environment login.
- API key placeholder: Create a 32+ character random string for local development credentials.
- Teaching password length: Show how moving the slider past 10 characters changes the label from Medium to Strong.
Input / Output Examples
Input
12 chars, symbols
Output
X7#mK9@qL2p!
Frequently Asked Questions
How secure are the generated passwords?+
Our password generator uses cryptographically secure random number generation to create passwords. The passwords are generated locally in your browser and are not stored anywhere.
What makes a strong password?+
A strong password should be at least 12 characters long, contain a mix of uppercase and lowercase letters, numbers, and special characters, and avoid common words or patterns.
Should I use different passwords for different accounts?+
Yes, absolutely! Using unique passwords for each account ensures that if one password is compromised, your other accounts remain secure.
How often should I change my passwords?+
It's recommended to change passwords every 3-6 months, or immediately if you suspect a security breach. Use a password manager to keep track of multiple passwords.
Key Features
- Length range 4–128
- Uppercase, lowercase, numbers, symbols checkboxes
- Math.random character selection
- Length-based Weak/Medium/Strong label
- Copy button on result
Benefits
Create passwords without memorizing random characters yourself.
Tune length and character types for site-specific rules.
No server sees the generated password.
When to Use Password Generator
- Creating a disposable password for a test account
- Generating a long random string when length matters more than audit scoring
- Quickly producing a password with specific character types enabled
- Demonstrating how length affects the simple Weak/Medium/Strong label
Advantages
- Length slider from 4 to 128
- Four independent character-set toggles
- One-click copy of the generated password
- Instant client-side generation
Tips
- Enable all four character types for a wider symbol pool on each generation.
- Use 12+ characters for the Strong label — remember it is length-only, not a real audit.
- Do not reuse Math.random passwords for high-value production accounts without a crypto-grade generator.
- Copy immediately — the password is not stored between page refreshes.
Common Mistakes
Expecting the strength label to analyze character diversity — only password length matters.
Unchecking every character type and wondering why generation fails.
Using this as a password strength checker for an existing password — it only generates new ones.
Assuming Math.random output is cryptographically secure.
Summary
Set length and character types, generate a Math.random password, and copy it — the Weak/Medium/Strong badge reflects length only, not a full strength audit.