Password Strength Checker
Type a password and see its character pool size, entropy in bits, a 0–4 strength score, and crack-time estimates for both online (1,000 guesses/sec) and offline (10 billion guesses/sec) attacks. Everything runs in your browser — the password is never transmitted.
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Type
Calculator
Related tools
Tools that work with the same formats — most users open one of these next.
QR Code Reader
Scan a QR code from any image and decode it to text — free, online, runs entirely in your browser.
QR Code Generator
Generate a QR code from any text, URL or contact data — pick error correction and scale, get a PNG.
File to Hex Dump
Convert any file's bytes to a hex dump (with ASCII sidecar), plain hex, C array or comma-separated bytes.
Hex to Binary File
Parse a hex dump or hex string back into a binary file — strips offsets, ASCII columns, prefixes and separators automatically.
Wi-Fi QR Code Generator
Generate a Wi-Fi QR code as a PNG — scanning it auto-joins the network. Supports WPA / WEP / open networks and hidden SSIDs.
vCard QR Code Generator
Generate a QR code that contains a digital business card (vCard) — scanning it lets the phone save the contact in one tap.
Frequently asked
Is Password Strength Checker free to use?
Yes. Password Strength Checker is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — Password Strength Checker runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does Password Strength Checker work?
Open Password Strength Checker, paste or fill in the input fields, and the result updates instantly. Everything runs in your browser — no upload, no waiting.
Which browsers does Password Strength Checker support?
Any modern browser works — Chrome, Firefox, Safari, and Edge on desktop and mobile. Password Strength Checker uses standard web APIs and does not require any plugin, extension, or sign-up.