Paste a text. You see straight away which invisible control characters it carries and which punctuation habits make it read as machine-written. Your text stays inside this browser.
The check runs in your browser. There is no endpoint your text gets sent to, and therefore no daily limit either.
Two of them are technical defects and always go. The other four are habits you can switch on and off.
It does not make your text undetectable. Detection services guess from word choice, sentence length and structure, not from control characters. Anyone promising otherwise is selling you something.
What disappears here are genuine technical defects and typographic habits. The text gets cleaner and reads less dictated. That is the whole claim, and it is enough for the purpose: a proposal with forty dashes in it reads as clicked together, even where nobody says the word AI out loud.
Reference
Two different things carry the handwriting of a machine: invisible control characters that travel along when you copy, and sentence habits that come from routine. The first is measurable, the second is a hint.
A U+200B is a space with no width. It sits between two letters, shifts nothing and is invisible in an editor. It has several relatives, among them U+200C, U+200D and U+FEFF. In ordinary prose none of them has any business being there.
The non-breaking space U+00A0 is correct in typesetting, for instance between a number and its unit. Twelve further variants almost never are, among them the thin U+2009 and the ideographic U+3000. They come from copying out of word processors and chats, and they break line wrapping later.
An en dash with a space either side is permitted in German and common in English. What makes it conspicuous is frequency: language models place it where a comma or a full stop would do, several times per paragraph. So we count it rather than forbid it.
Typographic quotes belong in set text, straight inch marks do not. They are a sign that a text has passed through a program that did not know the language. The fault is harmless and fixed in a second.
The ellipsis U+2026 looks like three dots but is a single character. It breaks search in a text, because anyone typing three dots will not find it. In set text it is right, in a file that goes on to be processed it usually is not.
Two spaces after a full stop come from the typewriter and have been obsolete since hot metal. They do not show in a browser, because HTML collapses them, but they reappear in every further processing step.
None of these characters proves that a text came from a machine, and their absence proves nothing either. A paragraph copied out of a PDF carries the same traces. The characters point to the route a text has taken, not to its author.
The check happens entirely in your browser. There is no endpoint the text could go to and no buffer it could land in. For a text you are checking before publishing, that is the only setup that works without a leap of faith.
The cleaned text removes the invisible characters and smooths the typography if you ask it to. It changes no word and no sentence structure. What sounds machine-made stays machine-made, and that is a job for you, not for a tool.
No. The entire check runs in your browser, there is no endpoint a text would be sent to. That is also why the tool keeps working offline once the page is loaded. For completeness: if you accepted measurement, the page reports the number of spots found to our statistics, exactly as the other three tools do. The text itself is never part of it. If you would rather not, decline in the consent dialogue and the tool works exactly the same.
No, and anyone promising that is selling you something. Detection services guess from word choice, sentence length and structure, not from control characters. What disappears here are real technical defects and typographic habits. The text gets cleaner and reads better, we claim nothing beyond that.
Because this tool costs us nothing. The other three put a language model to work behind the scenes and are limited to one query a day for that reason. Here your own browser does the computing, so you can check as often as you like.
Unicode has a set of zero-width characters that control how text is laid out: zero width space, word joiner, soft hyphen, directional marks and several more. They make sense in Arabic and Hebrew script, in breaking long words and in mathematical notation. In ordinary running text they have no business being there.
Yes. The toggle above the result separates the two: invisible characters always go, because they do technical damage. Dashes, quotation marks and spacing are only touched if you want them touched. Some texts need the dash, a quotation for instance.
Because a comma carries almost every spot where a dash stands between spaces. A full stop would often be better, but for that a tool would have to understand the sentence. Read through the spots and put a full stop where two main clauses meet.
Not here. The AI design check looks for fifteen of them in a website's source, and the AEO check quotes them verbatim at the spots where your page is missing an answer. This tool works on characters and punctuation only, without judging the content.
Copy the cleaned text back. If you notice your website collecting spots like these regularly, a template with the typography already settled helps, or the AI Website Service.
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