How Strong is Your Password? Free Checker That Never Sees Your Password

Most password checkers send your password to a server. Mine does not. Everything runs client-side.

What it checks

• Entropy — mathematical strength in bits
• Time to crack — at 10 billion guesses per second
• Character diversity — uppercase, lowercase, numbers, symbols
• Length requirements — 8+ and 12+ character checks
• Common pattern detection — catches "123", "abc", "password"

Example Results

Password	Strength	Time to Crack
password	Very Weak	Instant
P@ssw0rd	Fair	2 minutes
MyD0g$Name2024	Strong	1M years
kj#8Hm!pQ2&xL9	Very Strong	Centuries+

Privacy

Your password never leaves your browser. There is no server, no API call, no logging. Check the source — it is a single React component with zero network requests.

Check Your Password

Related:

• Password Generator — Generate secure passwords
• Hash Generator — SHA-256, MD5, etc.

Full toolkit: devtools-site-delta.vercel.app