Check a bachelor's thesis for AI text

The literature review and false alarms

The theoretical part of a bachelor's thesis summarises the literature: definitions, paraphrased sources and an overview of terms, written neutrally. Text like that is predictable, and detectors often score it higher even when you wrote it yourself.

A higher score in the literature review therefore proves nothing on its own. The practical part, the introduction and the conclusion say more — that is where it should show what you found and how you think about it.

What to take out before checking

Verbatim quotations, the reference list, tables, figure captions and appendices. It is text you did not write, or text without continuous sentences, and it only skews the result.

Paste one chapter or subchapter at a time. The demo above handles 3,000 characters without signing in; with a free account you paste a whole chapter at once and the results go into your history.

A similarity check is not an AI check

The similarity check universities commonly run on final theses compares your text with other documents and looks for copied passages. Text from a language model is usually new, so it may not show up there at all.

An AI detector measures something else: how predictably the text is written. A low similarity score says nothing about how the thesis will do in a detector, and a high detector score does not mean plagiarism.

A score is not a verdict

No AI text detector is one hundred per cent accurate. The score points to places that deserve a second read, not to who wrote the text.

So check before you send a chapter to your supervisor. If a passage reads as machine-made, you have time to rewrite it in your own words, and your supervisor gets a text you can stand behind.

Can a whole bachelor's thesis go into one check?

Technically yes: a free account takes texts of up to 300,000 characters. A result per chapter is easier to read, though, because one number for the whole thesis averages the literature review with your own part.

Am I allowed to use AI while writing my thesis?

It depends on your university and department; the rules differ. Read your department's guidelines and agree it with your supervisor. If the rules ask you to state what you used AI for, state it.

Should I check the abstract too?

You can, but an abstract on its own is short and written to a set template, so the score says little about it. Check it together with the introduction.

What if the detector flags text I wrote myself?

It happens, mostly with definitions and terse descriptions. Read the marked sentences and keep your drafts and notes — they say more about how you worked than any score.