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Create strong, random passwords and test how strong your existing ones are — free, in your browser, with nothing uploaded. No signup. No tracking. No “forgot password” emails.
Everything above runs on this device. The value never leaves your browser and is not logged, cached, or sent anywhere.
A password generator builds a random string from a defined character set using cryptographically secure randomness. A strength checker does the opposite: it takes a candidate password and estimates how quickly an attacker could guess or brute-force it. This page does both. You generate a candidate, then immediately see its entropy, its approximate crack time, and whether it trips common weakness patterns.
The two are most useful together. A generated password that “feels” random but only mixes lowercase letters has far less entropy than the same length that also draws from digits and symbols. The meter here makes that difference visible instead of leaving it to intuition.
Most breaches now come from credential stuffing and reused logins, not from a fresh dictionary attack on one clever password. When one site leaks, the same password is tried on hundreds of others. A unique, high-entropy password for each important account stops that chain: the attacker who compromises your email provider has no working key to your bank, cloud, or phone.
Modern password managers have reduced the cost of uniqueness to near zero, so the main reason people still reuse short passwords is habit rather than necessity. This tool is a quick way to break that habit for anything you are not yet ready to move into a manager.
The meter starts from the size of the character pool in use. Lowercase alone is 26 symbols per position; adding uppercase, digits, and symbols grows that pool. Entropy is then length × log₂(pool size). We translate bits into a rough crack time by comparing it against a large GPU cluster’s guesses-per-second. The result is an approximation, not a certificate: it ignores dictionary attacks, personal information in the string, and whether the target service caps attempts.
The checklist below the meter covers the practical rules that catch most weak inputs: minimum length, character-class coverage, repeated-character patterns, and membership in a list of commonly breached strings. Passing the checklist plus a healthy entropy score is a good sign that the password is unlikely to fall to a fast online attack.
Adding one random word-length chunk is worth more than forcing two symbols. A 24-character passphrase of mixed classes is stronger than a 12-character scramble.
The generator gives you a string; a password manager gives you a place to keep thousands of them without memorizing. They pair naturally.
Changing a password every 30 days invites weaker, patterned guesses. Change on suspicion of compromise, not on a calendar.
A strong password plus a TOTP key is far more resilient than either alone. For high-value accounts, two independent factors is the standard.
There are three common strategies, and the right one depends on what you need the password for. A random generated string is ideal for online accounts that will be filled by a manager. A long passphrase of several unrelated words is the best memorizable option for a master password or anything you must type under pressure. And a purpose-specific passkey is the strongest of all where the service supports it, because it is device-bound and cannot be phished.
The toggle set here supports the first two. If your target service offers a passkey, prefer that over a password entirely — the password then becomes a fallback rather than a front door.
Yes — this one runs entirely client-side. The string is built from secure random values on your device and is never transmitted or stored. You can confirm by opening the page with your network off; it still works.
The meter maps entropy bits to an estimated crack time on a large GPU cluster. “Strong” means the offline brute force would take years; it does not account for a data breach that exposes the password directly, which is why you still want it unique to that one service.
Major security guidance has moved away from forced rotation. Rotate when you suspect compromise or when leaving an organization, and use unique passwords (or a manager) everywhere. Regular rotation mostly produces weaker, patterned passwords.
For something you must remember, a long passphrase of unrelated words wins: high entropy, low typo rate. For account passwords you do not need to recall, a fully random string of 20+ characters is stronger per character and easier to manage with a password manager.
For day-to-day needs this covers the two jobs people actually have: making a new credential and judging an existing one. The generator is client-side and secure-random, and the checker gives an honest entropy plus crack-time estimate rather than a vague “good/bad” color. Pair it with a password manager for storage and two-factor authentication for the accounts that matter most.
If you are already protecting an inbox with disposable addresses, this is the natural companion tool for the rest of your digital life — the same principle of reducing what a leak exposes, applied to credentials.