XDetector

What X Detector is

X Detector is described as a free multilingual machine-writing detector that scores whether text came from one of the major models, across more than twenty languages. It is a simple paste-and-check tool aimed at academic integrity.

A caveat has to come first, because it shapes everything below: the official site did not load when this was checked, so the details here come from third-party directories rather than from the operator. Those describe it as permanently free and repeat a high accuracy claim. Treat both as unverified and confirm on the live site before relying on either.

What it does

According to those directories, you paste text and receive a probability with per-sentence cues, aimed at spotting generated work.

Multilingual coverage is the reason a tool like this gets noticed, and it is also where the greatest caution is needed. Detectors are built and evaluated predominantly in English, and performance in other languages is where they are least reliable, which falls hardest on the writers who can least afford a wrong result.

If the site is reachable when you read this, the first thing to check is whether the language coverage is real or nominal, since a directory listing twenty languages is not the same as twenty languages being supported well.

Who it is for

It is aimed at students and teachers. Anyone wanting a no-cost check before a closer look is the intended user, and the institutional framing suggests essay-length work.

What to keep in mind

The sourcing problem is the main thing to weigh. A tool whose only available description comes from directories is a tool you cannot verify, and that matters more than usual here, because a detector is something people rely on to make decisions about other people's work. Confirm that the site exists, that it is free as described, and that a policy is published.

No privacy or certification was named in those sources, so read the live policy before pasting anything, and be careful about submitting work that belongs to someone else.

The score itself is a signal rather than a finding. Detection is statistical and misclassifies unevenly, and where a tool has no accountability behind it there is nobody to ask what a result meant.

Two practical points. Do not use an unverifiable tool for anything consequential, since there is no vendor relationship, no documentation to show a reviewer, and no route to dispute an outcome. And run a passage you wrote yourself through it first, because that is the fastest way to learn how it behaves on your own writing. If the site turns out to be unreachable when you look, treat that as the answer rather than as a temporary inconvenience, since a checking tool that cannot be reached cannot be relied on for anything.