Is my password sent to a server to be checked?

No — the strength check runs entirely in your browser using JavaScript; your password is never transmitted.

How is the strength score calculated?

It combines length, character variety (uppercase, lowercase, numbers, symbols), and penalties for repeated characters or common passwords.

Does a high score guarantee my password is safe?

It indicates resistance to common guessing patterns, but no scoring tool can guarantee safety against every possible attack — using a password manager with unique passwords is still recommended.

Why did a long password still score poorly?

It may be one of the most commonly used passwords, or rely heavily on repeated or sequential characters, both of which are penalized.

Should I check my real, in-use passwords here?

Since the check is entirely local and never transmitted, it is safe to check real passwords, though using a freshly generated password is always a stronger choice.

What is considered a strong score?

Scores of 80 and above indicate a very strong password; 60-79 is strong; below that, the specific feedback shown will explain what to improve.

Herramientas de Contraseñas

Verificador de Fortaleza de Contraseña — Herramienta Gratuita en Línea

Comprueba qué tan fuerte es una contraseña y recibe consejos para mejorarla.

Usar Esta Herramienta

Funciona en Tu Navegador
Resultados Instantáneos
100% Privado

Password to Check

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What Is a Password Strength Checker?

A password strength checker analyzes a password's length, character variety and common weaknesses — like repeated characters or being one of the most commonly used passwords — to give an at-a-glance score and specific feedback on how to make it stronger.

It is a quick way to sanity-check a password before using it, without needing to memorize security best practices — the tool tells you exactly what's missing, such as a missing symbol or insufficient length.

¿Quién Usa Esta Herramienta?

Para Empresas

Check that a new shared account password meets a reasonable strength bar.

Para Uso Personal

Check whether a password you're about to reuse is actually strong.

Para Estudiantes

Explore what makes a password strong or weak for a security course.

Para Oficinas

Sanity-check a password before setting it on a new system.

Por Qué Usar Esta Herramienta

Características Clave

Live Strength Score

See a strength score update as you type, character by character.

Specific Feedback

Get concrete suggestions, not just a vague strength label.

100% Private

Your password is checked entirely in your browser — never transmitted.

Instant Results

No button to click — feedback updates as you type.

El Resultado

Beneficios

Know Exactly What to Fix

Get specific, actionable feedback instead of a generic pass/fail.

Checked Locally

Your password is never sent anywhere, even temporarily.

Quick Sanity Check

Verify a password's strength in seconds before using it.

Paso a Paso

Cómo Usar Verificador de Fortaleza de Contraseña

Type a Password

Enter the password you want to check.

Read the Strength Score

A live meter and label show how strong it is.

Apply the Suggestions

Follow the specific tips shown to improve it.

Especificaciones

Detalles Técnicos

Detalle	Valor
Entrada	Plain text password input
Procesamiento	No practical limit
Salida	Heuristic scoring based on length, character variety and known weak patterns

Puedes Verificarlo

Privacidad y Seguridad

Lo que realmente sucede con tu archivo al usar esta herramienta.

100% Client-Side

This tool runs entirely inside your browser using JavaScript — nothing you type or generate is ever sent anywhere.

No Upload, Ever

There is no file upload and no server processing step — your data never leaves your device.

Works Offline

Once this page has loaded, the tool keeps working even without an internet connection.

Nothing Stored

Nothing you enter is saved on our servers — refreshing the page clears everything.

No Tracking of Your Input

We have no way to see what you type, generate or convert with this tool.

Obtén Mejores Resultados

Consejos

Aim for 12+ Characters Minimum

Length is one of the strongest contributors to password strength.

Avoid Common Passwords Entirely

Even a long common password (like "password123") is easy to guess — use the Password Generator instead.

Preguntas Frecuentes