AI Content Detector

The AI Content Detector estimates how much a passage reads like machine-written text. It looks for patterns such as stock openers, evenly sized sentences, filler transitions, buzzwords and vague claims, then shows each signal with the sentence that triggered it.

It is built for bloggers, editors and SEO consultants who want a second opinion on a draft. It is not designed to accuse anyone of cheating.

1. Paste a passage: Add up to 6,000 characters. Use at least 150 words for a more useful result.
2. Run the detector: The tool sends your text through this site to Google’s Gemini model, which scores it and lists signals.
3. Read the verdict and score: Scores near the middle mean the model could not tell. That is common.
4. Read the signals: Each signal comes with evidence from your text, so you can decide whether to edit.
5. Check the sentence statistics: These are calculated in your browser and show sentence length patterns.

A passage with stock phrases such as “in today’s fast-paced digital landscape” and chained transitions.

A high score is a prompt to edit, not proof.

• Spot stock phrases and filler in your own drafts before you publish.
• Get a second opinion on freelancer or AI-assisted content.
• See which sentences cause the signal, so you know what to rewrite.
• Check sentence length patterns that make writing feel robotic.
• Learn why detectors flag some human writing.

I compared this with the free AI detector on surferseo.com, read from its page on 22 October 2026.

Where they are ahead: Surfer highlights the flagged text inside your draft, has third-party review ratings and has been tested by others on large content sets, according to its page. This tool does not highlight text.

Compared on 22 October 2026 by opening each tool and reading its page. Features can change.

• No detector can prove who wrote a text. This one gives an estimate only.
• It produces false positives and false negatives. Do not use a score to accuse a student, writer or client.
• Short texts, formal writing, heavily edited AI text and writing by non-native English speakers are often misjudged.
• It is built for English.
• Each visitor can run this tool 5 times an hour, and a daily cap across all AI tools on this site means it can pause on busy days.

Your text is sent from your browser to this site, which passes it to Google’s Gemini model to produce the result. This site does not store your text. It keeps only short-lived counters to enforce usage limits. Google handles the text under its own terms. Do not paste passwords, client secrets or other confidential or personal data. The site’s Privacy Policy explains this in full.