Skip to content
OUR OWN ENGINE · INSPECTABLE EVIDENCE SEOKIT

AI Content Detector

Check Russian or English text for AI patterns. Analysis needs at least 120 words.

29 editorial checksRU / UK / EN No external AI model
Import a file, URL or HTML

TXT, MD, HTML (UTF-8 / UTF-16), DOCX or PDF, up to 2 MB. PDF: up to 100 pages with a text layer; no OCR. Analysis limit: 50,000 characters.

For AI analysis: Russian or English text of at least 120 words. Up to 50,000 characters. Source search sends short excerpts to Serper/Google.

What do the numbers mean?

Editorial markers

Share of words in passages found by local rules. This is neither plagiarism search nor an AI-authorship probability.

AI-feature index

Local model index, 0–100: signal relative to a tested threshold, not authorship probability or AI-word percentage. Russian and English prose of at least 120 words.

English uses two model scores and their thresholds; Russian uses a separate model. A number does not establish authorship.

The Russian model was trained on news, essays and scientific texts from Ru-hard-detection-dataset; the English models on RAID, MAGE and DetectionAI. Quality varies by topic and generator. No internet source search or proof of authorship is provided.

AI scoring runs on the SEOKit server. Short excerpts are sent to Serper/Google for source discovery; retrieved pages are compared locally. Text is not stored on the server. Local history is opt-in.

Review history

Up to 10 recent reviews, including full text, are stored only in this browser. Do not enable on a shared device. History is not stored on the server.

01

See the exact passages

Switch between your draft and its highlighted version without losing your place.

02

Know where to start

Six editing dimensions, priority filters and actionable explanations.

03

Keep a clear perspective

Rule-based analysis, not an authorship verdict. Review meaning and sources yourself.

Method and limitations +

No authorship or factual-accuracy verdict. A text with no matches is not certified human-written, accurate or ready to publish.

Phrase matching uses small EN/RU/UK dictionaries. Repetition means a four-word sequence appearing at least three times; up to 12 distinct sequences are selected. Structure notices use length variation (8+ sentences or 3+ paragraphs). Thresholds are editorial heuristics, not calibrated probabilities. Sentence boundaries and language detection may be imperfect. Specialist terms, quotes and deliberate repetition may be appropriate. No semantic analysis or web fact-check is performed.

Ruleset 4 adds literal RU/UK/EN phrase families and bounded sentence patterns, including repeated formulaic constructions. Repeated-word families require at least 3 occurrences (reassurance: 2), and at least one per 100 words. Openers, signposting, with-ing, participial tails, contrasts and paired dashes require 2; parentheses and formulaic constructions require 3. Isolated hedges or a single dash are not flags. Heading checks require explicit Markdown ##/###; structural comparisons and both indexes require 120 words. With-ing is English-only. New markers ignore Markdown code and URLs. No stemming, semantic similarity, citation verification or scientific authorship model is used. Combination cards group markers in the same paragraph; document-wide rhythm may contribute. Thresholds may misfire on technical, quoted or deliberately repetitive text.

Editing priority · 0–12

Provisional automatic index, NOT an AI probability or a quality verdict. Only detectable markers count; meaning and source reliability still require an editor. A zero does not certify the text.

Each dimension: 0 = no supported markers; 1 = one rule with 1–2 matches; 2 = at least two rules or three matches. Total: 0–3 light review, 4–7 substantial editing, 8–12 consider a deep edit. These are workflow hints, not validated cutoffs. Repetition across categories may raise several dimensions. The index is available from 120 words.

Next step

Continue in AI SEO

Read: SEO in 2026: what still works after AI search What AI Overviews changed All tools in this group →
SEOKIT · GROQ

SEOKit assistant

0 / 1000

Data at Groq