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PasswordStrength

SM · 950B gzip budget

Visual password strength meter with labelled feedback.

Category
Forms & input
Budget
sm, single-purpose control
External runtime
React / React DOM only
axe fixtureSSR rendersource scanbundle budget

Preview

Live fixture
Preview locale
Password strength
Strength: Weak

Try the component here. Locale-aware formatting and direction follow the selected language; example content and labels are not automatically translated. Overlay demos use interactive launchers.

Install

npx shadcn@latest add https://gear5-ui.vercel.app/r/password-strength.json

Copies the source into your project. Pulls in 1 shared registry item: cn.

New here? Set up Tailwind and import aliases first →

Source & props

Edit on GitHub ↗

Prop types and inline documentation are included below. This is repository source; the installer rewrites shared imports for your project.

"use client";

import { useId, useMemo } from "react";
import { cn } from "../lib/cn";

export interface PasswordStrengthProps {
  value: string;
  label: string;
  className?: string;
}

const LEVELS = [
  { label: "Weak", color: "bg-red-500" },
  { label: "Fair", color: "bg-orange-500" },
  { label: "Strong", color: "bg-lime-500" },
  { label: "Very strong", color: "bg-green-600" },
];

function getStrengthLevel(password: string): number {
  let score = 0;
  if (password.length >= 8) score++;
  if (password.length >= 12) score++;
  if (/[A-Z]/.test(password) && /[a-z]/.test(password)) score++;
  if (/\d/.test(password)) score++;
  if (/[^A-Za-z0-9]/.test(password)) score++;
  if (password.length >= 16) score++;
  return Math.min(Math.floor(score / 1.5), 3);
}

export function PasswordStrength({ value, label, className }: PasswordStrengthProps) {
  const id = useId();
  const level = useMemo(() => (value ? getStrengthLevel(value) : -1), [value]);

  return (
    <div className={cn("flex flex-col gap-1.5 text-start", className)}>
      <span id={id} className="text-sm font-medium">
        {label}
      </span>
      <div className="flex gap-1" role="meter" aria-labelledby={id} aria-valuemin={0} aria-valuemax={3} aria-valuenow={level >= 0 ? level : undefined}>
        {LEVELS.map((l, i) => (
          <span
            key={i}
            aria-hidden="true"
            className={cn("h-2 flex-1 rounded-full transition-colors motion-reduce:transition-none", level >= 0 && i <= level ? l.color : "bg-neutral-200 dark:bg-neutral-800")}
          />
        ))}
      </div>
      <div aria-live="polite" className="text-xs text-neutral-600 dark:text-neutral-400">
        {level >= 0 && <span>Strength: {LEVELS[level].label}</span>}
      </div>
    </div>
  );
}

What CI checks

Quality contract
  • Bundled, minified and gzipped against its tier budget
  • Audited by axe in the state previewed above
  • Rendered through react-dom/server with no browser globals
  • Scanned for network calls, dangerous sinks, and unguarded animation
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