Built for Czech and Slovak
Foreign detectors often shoot from the hip on Czech and Slovak and turn an ordinary complex sentence into a suspect. Our model works out the language on its own and accounts for how a sentence is built here.
312 people use DetekceGPT
Spot AI text before
anyone else spots it
Before you send that paper, article or pitch on, look at it through the detector's eyes. You will see exactly what the person on the other side will see. The sentences the detector reads as AI are colour-marked right in the text.
Free to try · No card required · Cancel your subscription any time with one click
Everything you need to know about a text, on one screen.
7×Detectors at once
AI watermarkHidden characters in the text
200,000 charactersLongest text in a single check
91 / 100 AIScore of the last analysis
4.8 sAverage analysis time
91 → 6 AIText after humanisation
Try it right now
Paste a text and see the detector's score along with the sentences it marked as AI. Five detections per 30 days and texts up to 3,000 characters, no sign-in needed. Seven detectors, sentences colour-marked by each detector and texts up to 200,000 characters unlock after .
Six more detectors
The Style deviation detector unlocks after you sign in. A free account is all it takes.
The Type template detector unlocks after you sign in. A free account is all it takes.
The AI phrases detector unlocks after you sign in. A free account is all it takes.
The Machine feel detector unlocks after you sign in. A free account is all it takes.
The Hidden characters detector unlocks after you sign in. A free account is all it takes.
The OpenAI detector unlocks after you sign in. A free account is all it takes.
This is what the full version looks like
A recording of the app on the Pro plan. The dashboard, detection, humanisation, questions and text history exactly as a signed-in user sees them. You can try it for free and cancel any time with one click. The plan then keeps running until the end of the paid period.
What makes it different from foreign detectors
It is not just a different model. It differs in whose writing it was built for, what it does with your history and how it behaves when it is not sure.
We also find the model's hidden signature
Some models leave invisible characters and marks in the text that carry over when it is copied. We look for them separately, so they turn up even in a text that otherwise reads perfectly naturally.
Open a browser and that's it
No plugin, no browser extension, no waiting in a queue. It works on a phone too, ten minutes before the deadline.
When it is not clear, we say so
The models sometimes disagree, and that in itself means something. Instead of a hard verdict you see the spread and decide for yourself.
The more texts, the better the result
The model also looks at what you checked earlier. The more saved or uploaded texts it has, the more precisely it learns how you write, and the better both detection and humanisation fit. The free plan keeps the last seven texts, on Pro they all stay.
One tool for both sides of the desk
A teacher checks a submitted paper, an author checks their own before sending it. Both look at the same numbers, so there is something to actually talk about.
Three screens, one job.
See what happens after you paste a text and press the button. Try a detection.
Detection result87 / 100 AI
Style deviation74
AI phrases91
ZeroGPT87
In today's dynamic era, artificial intelligence plays a key role. I tried it yesterday and had to rewrite half the paragraph from scratch. It is therefore important to mention several fundamental aspects.
I don't want to accuse anyone on a hunch. When something feels off, at least I have something to bring to the student — and a few times it has proved the hunch wrong.
Freelancers send texts at the last minute. Before it goes to layout I run it through and I know what I am dealing with.
A client wrote to me that it came out as AI somewhere. I wrote it myself. Since then I would rather run it through before sending.
We have a rule agreed on in the team. Six months on, the arguments about who really wrote what have stopped entirely.
I spent three months on my bachelor's thesis and the day before the deadline I wanted to go through it once more. Within seconds I knew everything was fine.
A stack of papers, not one text
Upload thirty files at once and each one is scored separately. Open only the ones that stand out. Batch checking is part of the Pro plan.
Batch check30 files
Novakova_term_paper.docx12 AI
Dvorak_essay.pdf48 AI
Prochazka_report.docx91 AI
Kucerova_reflection.pdf33 AI
Benes_term_paper.docx67 AI
Upload them in one go
Drag in the whole folder. No copying text one file at a time.
Each one gets its own score
Results are never merged into an average. For every paper you see its numbers and the sentences the detector marked.
You know where to start
The suspicious papers come to the top. The rest you read for content, not for suspicion.
A plan for everyone
Start free and move up only once it actually starts to make sense for you.
Free
For trying it out and the occasional check
0 CZK/ 30 days
Cancel any time
- 5 checks per 30 days
- 5 humanisations per 30 days
- Texts up to 200,000 characters per check
- 200,000 characters per 30 days in total
- All seven detectors at once
- Colour map of the text
- History of the last 7 checks
- Texts are not used for training, only to sharpen your own detection and humanisation
Pro
For everyday writing and checking
250 CZK/ 30 days
Cancel any time
- Everything in Free
- 200 checks and 200 humanisations per day
- Several files checked at once, each evaluated separately — for sets of student papers
- Texts up to 200,000 characters per check
- 4,000,000 characters per 30 days in total
- Up to 20 of your own samples so humanisation sounds like you
- Loading text from a file
- Exporting text to a file
- Generating questions and answers from a text
- Your full check history for more precise detection and humanisation
- Style deviation from your whole history — the free plan keeps the last seven texts, Pro keeps them all and the deviation fits more closely
- Priority support
- Cancel any time, access stays until the end of the paid period
Team
For schools, newsrooms and agencies
Let's talk
Depending on team size
- Everything in Pro
- A shared overview for the whole team
- Billing to a single account
- Onboarding at the start
From sign-up to a finished text
Three steps with nothing missing in between. From an empty account to a text whose outcome you already know.
Run a detection for freeCreate an account
Signing up is free and takes a minute. We don't want a card — once you confirm your e-mail you go straight into the app.
Paste a text and run the detection
Copy in a paragraph or upload a file. Within seconds you see the score, a colour map of the text and the specific sentences the detector treats as suspicious.
Rewrite a high score with humanisation
If you don't like the result, send the text into humanisation. It comes back rewritten and you can measure it again right away, so you see how far the score dropped.
Frequently asked questions
Something unclear? The answers to what people ask most often are all in one place here.
Is detection free?
A free account gives you five checks and five humanisations per 30 days, texts up to 200,000 characters and 200,000 characters a month in total — whichever runs out first. No card needed. Look at a paid plan once you find it makes sense for you.
When is the Pro plan worth it?
When you run out of five checks or 200,000 characters per 30 days, or when you mark work in batches — Pro takes the files at once and each one gets its own score. For one check a month a free account is enough and paying makes no sense.
Can I share the Pro plan with colleagues or a whole school?
The Pro plan belongs to one account and login details are not meant to be shared. For several people there is the Team plan — a shared overview, billing to a single account and onboarding at the start. The price depends on the size of the team, so write to us and we will work it out.
Can I cancel the subscription any time?
Yes, with one button in the menu, no calling or writing to support. Your Pro plan then keeps running until the end of the paid period and nothing more is charged. Until then you can come back to renewing with the same button at any time.
How accurate is the detection?
We run the text through seven detectors at once and show each one separately — we never merge them into a single number. No detector in the world is certain, which is why you also see where the results disagree.
Do you find hidden characters in the text?
Yes, one of the seven detectors looks for invisible characters that get into the text when it is copied out of a chat and that you cannot see in an editor. We show them separately — a zero there does not mean a human wrote the text, only that there are none in it.
Do you store my texts?
Checks are saved to your history and the model draws on them so that detection and humanisation fit you better. We do not use them to train a shared model, and one button in the menu deletes your whole history along with uploaded samples.
Does it work for other languages?
The model is built for Czech and Slovak, because that is where foreign detectors go wrong most often. It works out which of the two a text is on its own. For other languages some of the detectors have nothing to compare against, so treat the result as indicative only.
What exactly does humanisation do?
It rewrites the whole submitted text so that it has a different structure and rhythm. It follows the document type and your sample texts so that it sounds like you. Facts, numbers and tone stay the same; only the way they are written changes.
How long a text can I submit?
The minimum is 100 characters, the maximum 200,000 per text, which covers a whole thesis at once. The free plan handles 200,000 characters per 30 days, Pro 4,000,000. For longer documents the result fits better if you split them by chapter.
Do I have to install anything?
No. No plugin, no browser extension. Open the page, paste a text and within seconds you have a result, on a phone too.
How does support work?
We are a small team, so an answer reaches you quickly. Most things, though, are already covered in the help.
Try it on your own text
Take the paragraph that has been on your mind and be sure about it before you send it on.