Password Strength

Type a password to see a strength score, approximate entropy bits, and whether it includes length and character-class signals.

Introduction

Password Strength Checker is a free, browser-based utility in our Crypto & Security Tools collection. Type a password to see a strength score, approximate entropy bits, and whether it includes length and character-class signals. Password Strength Checker provides a local heuristic score and entropy estimate so you can improve passwords before using them - not a breach database lookup. Everything runs locally in your browser — inputs stay on your device, with no account or upload required. Highlights include score out of 100.

Features

Score out of 100
Approx entropy bits
Character-class checklist
Local-only evaluation

How to use

1
Enter a password.
2
Review score, entropy, and checklist tips.

Example

Weak vs strong

Input

password vs Str0ng!Pass-Phrase

Output

Higher score for longer mixed charset

Benefits

Run Password Strength entirely in the browser with no signup or installation.
Keep sensitive sample data private — processing never leaves your device.
Score out of 100
Approx entropy bits
Character-class checklist
Pair it with Password Generator and Hash Generator when your workflow needs adjacent utilities.

FAQs

No. It only scores composition heuristics locally.

No.

It’s a guide. Prefer long unique passwords stored in a manager.

Yes. Password Strength on EverydayDevTools is free, with no account, watermarks, or usage caps for normal interactive use.

No. Password Strength runs in your browser. Your input is processed locally and is not sent to EverydayDevTools servers.

Type a password to see a strength score, approximate entropy bits, and whether it includes length and character-class signals. It fits everyday crypto & security tools tasks when you want a fast local utility instead of installing a CLI or opening a heavy IDE feature.

Core capabilities include: Score out of 100; Approx entropy bits; Character-class checklist; Local-only evaluation.

Developers often pair Password Strength with Password Generator, Hash Generator, UUID Generator. Open Related tools on this page for quick links.