Passphrase Review

Passphrase Review is a private browser-side check for obvious weak spots before a secret is used, shared, or stored.

What it checks

• Character length.
• Character variety.
• Repeated runs.
• Phrase-like structure.
• A rough estimated search-space signal.

Use cases

• Sanity-check a phrase before it goes into a password manager.
• Compare a memorable phrase against a shorter mixed-character secret.
• Catch repeated patterns that are easy to miss by eye.
• Review training examples without sending text to a remote scoring service.

Local privacy boundary

The passphrase stays in the browser. The site does not upload it, log it, send it to analytics, or compare it against remote breach databases.

The breach lookup is the obvious missing feature, and it is the one that cannot be built here. Every version of it — including the polite k-anonymity form that sends only the first few characters of a hash and filters the rest locally — still means a request derived from a live secret leaving a page you have just typed that secret into. The only claim this tool actually makes is that nothing derived from the input goes anywhere, and there is no way to keep that claim and answer the breach question as well.

Safer review workflow

The number is a heuristic because of where it comes from. The search space is estimated from the string itself — how many distinct characters it contains, plus a fixed allowance for each character class present — and from nothing else. A phrase built from four extremely common words therefore scores the same as four rare ones of the same length and shape; the check can see structure, and structure is all it can see.

Use the result as a heuristic, then store the final secret in the right password manager or credential vault. Do not paste real production secrets into unrelated websites just to get a score.

Limits

This is not a breach check, password-manager audit, or guarantee that a phrase is safe. It only flags visible patterns from the value you type.

Related

Use Passphrase Generator when you need a new phrase, or Hash Inspector for local digest work.