What is UnTXT?

You paste your writing in. A few minutes later it comes back with some passages marked in grey and some in gold. Grey is FLAGGED: the passage follows the patterns machine writing leans on, and clicking it tells you which ones. Gold is AUTHENTIC: it sounds like one particular person, and you should probably leave it alone. Everything unmarked is just writing.

It lives at untxt.uk and runs in a browser, so there is nothing to install. You sign in with Google, and the first 1,000 words are free.

What it is for

Most people arrive with the same worry: somebody is going to read this and think a machine wrote it. Sometimes a machine did help. Often it didn't, and the writing is simply formal, or careful, or in a second language, which is enough to pick up the same patterns. Either way a percentage is no use to you, because a percentage can't tell you which sentence to look at.

UnTXT tells you which sentence, and why, and then it stops. It doesn't decide who wrote anything, because nobody can tell that from the page, and it doesn't rewrite your work. Agency is yours to keep. Autonomy is ours to offer.

What you get

• Two marks, AUTHENTIC and FLAGGED, and a note on every marked passage saying what was noticed about it
• One reading of your work: two AI models go through each passage separately and argue it out, and a third settles whatever they can't agree on
• No percentage anywhere, and no button that hands you back a rewritten draft
• Documents, which keeps every check under its own title with the date, the word count and what it cost
• Run overnight, for about 40% fewer credits, when the work can wait until morning
• A PDF report on Educator and Professional accounts
• Credit gifting, so unused credit can go to somebody who needs it
• A referral link on every account: 10 CVT to a friend when they join, 10 to you once they come back on another day, and 90 more to you if they subscribe
• Prices in 14 currencies
• For developers, an API that runs the same analysis, with a cheaper heuristic mode for quick checks
• A browser extension that checks selected text on any page

Who uses it

Who makes UnTXT?

UnTXT is a trademark of Sataklela OÜ, registration pending, and Sataklela OÜ is who builds and runs it. It belongs to the CVaaS family of tools, which all live under untxt.uk.

Getting in

Go to untxt.uk and sign in with Google. There is no separate account to make and no card to hand over, and the first 1,000 words cost you nothing.

Universities and AI policies

UnTXT generates nothing. It reads a draft you have already written and marks it, which is a different thing from the tools most university AI policies were written about. Policies differ all the same, and yours is the one that counts.

We have read the published guidance at twenty-three UK universities and written up what each says, with the source and the date we checked it. They differ more than you would expect, and at least one tells students not to use a tool like ours on assessed work without permission. Nine are open to read: Loughborough, UCL, Imperial, Cambridge, Oxford, Manchester, Edinburgh, LSE and King's. The other fourteen open once you are signed in.

Wherever you study, our advice is the same: say you used it. One line does it. "I used UnTXT, an AI pattern checker, to check my own draft. It made no changes to the text."

If you teach, the marks give you somewhere to start a conversation with a student. They are not evidence of who wrote what, and we would rather say so here than have you find out in a hearing.