Free AI detector:
check your text for AI
and see exactly
what to fix
Umnoslovo is an online AI content detector for English text. It estimates the share of AI patterns with our own mathematical model, highlights the AI-generated sentences and explains how to make your writing sound human.
Why choose the Umnoslovo AI checker?
Most AI detectors give you a number. We estimate the share of AI patterns with a unique mathematical model and show you how to reduce it.
Accurate analysis
We detect AI patterns with our own mathematical model, built on the analysis of a large corpus of human and AI texts.
We show
what to fix
Instead of a bare percentage, you get concrete recommendations explaining how to improve each problem spot.
Highlights
in your text
Select a recommendation and the related words and sentences are highlighted right in the editor.
Instant
re-check
Edit the text and the analysis updates automatically, so you see how the AI percentage changes.
How to check text for AI in 3 steps
Check, improve and re-check your text in a few clicks
Copy your text into the editor and start the analysis.
See the AI percentage and recommendations with the problem spots highlighted.
Edit the text following the recommendations and watch the AI percentage go down.
What the AI content detector shows
The Analyzer evaluates your text by dozens of linguistic and statistical features to estimate how likely it is to be AI-generated, and reports the AI percentage together with the sentences that caused it.
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Who uses our AI text detector
A simple tool for everyone who cares about natural, original writing
Check essays, coursework and theses before submission.
Polish articles, books and blog posts before publication.
Make commercial texts read naturally and sound like you.
Review news, analysis and interviews before they go live.
Create posts and captions that feel natural to your audience.
Check website copy, newsletters and presentations.
What is an AI detector and how does it work?
An AI detector is a tool that estimates how likely a text is to have been generated by a language model such as ChatGPT, Claude or Gemini. AI writing differs from human writing in measurable ways: sentences come out similar in length, vocabulary repeats itself, punctuation stays plain and the same connectors keep coming back. A detector measures those features and compares them with the values typical of human writing.
How Umnoslovo checks text for AI
Our AI checker analyses your text across dozens of linguistic and statistical metrics — sentence structure and rhythm, vocabulary diversity, readability, punctuation variety, connectors and transitions, repeated constructions and more. Every metric that falls outside the human range turns into a recommendation, and the AI percentage shows how much of your text those recommendations cover.
From a percentage to a better text
Most AI content detectors stop at a score. Umnoslovo also highlights the AI-generated sentences right in the editor and tells you what to change in each one: merge these short sentences, use a shorter word, add a connector, turn this noun into a verb. You edit the text, the analysis re-runs as you type and you watch the AI percentage fall.
The service works with English and Russian texts of up to 12,500 characters per check. Check your text for AI free of charge — no sign-up required.
AI detector FAQ
probability
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