Are NanoTools completely free to use?

Yes, all basic tools on NanoTools are completely free to use with no registration required. We offer premium features for power users.

Is my data secure when using NanoTools?

Your files are processed securely and are automatically deleted after processing. We do not store your files or data on our servers.

Do I need to install any software to use NanoTools?

No installation required. All tools work directly in your browser on any device - computer, tablet, or smartphone.

What file formats are supported?

We support a wide range of formats including PDF, JPG, PNG, WebP, GIF, JSON, XML, CSV, and many more depending on the tool.

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Password Strength Tester - Check Password Security

Test password strength online for free. Check how secure your password is. Get security score.

Enter Password to Test

🔒 Password Best Practices:

• Use a unique password for each account
• Consider using a passphrase (random words combined)
• Enable two-factor authentication when available
• Use a password manager to store passwords securely
• Change passwords if a service reports a data breach

Privacy Protected

Your password is never sent to our servers. All strength testing happens locally in your browser.

What This Tool Does

Analyzes password strength in real-time
Estimates time to crack password
Checks for common passwords and patterns
Provides specific strengthening suggestions
Shows strength meter visualization

How to Use

1
Enter password
Type password to test (not stored or sent anywhere)
2
View strength score
See strength rating: Weak, Fair, Good, Strong, Very Strong
3
Read analysis
Review what makes password strong or weak
4
Implement suggestions
Follow tips to improve password security

How it works

Enter password

Type password to test (not stored or sent anywhere)

View strength score

See strength rating: Weak, Fair, Good, Strong, Very Strong

Read analysis

Review what makes password strong or weak

Implement suggestions

Follow tips to improve password security

Use Cases

Creating strong passwords for important accounts
Auditing existing passwords for weaknesses
Teaching password security best practices
Checking if password meets company requirements
Evaluating password manager generated passwords

Frequently Asked Questions

Is my password sent to a server?

No, all password testing happens in your browser. Nothing is stored or transmitted.

What makes a password strong?

Length, character variety (uppercase, lowercase, numbers, symbols), and avoiding common patterns.

How long should my password be?

Minimum 12 characters recommended. Longer is better - 16+ characters ideal.

Should I use password managers?

Yes, password managers help create and store strong unique passwords securely.