A Gemini detector that reads past the formatting.
Gemini arrives headed, bulleted, bolded. Paste any text for a verdict and a sentence-level report.
50 free scans a day · 2,500 words per scan
Gemini tells
What Gemini writing looks like
Gemini reaches for structure earlier than the other major models. Ask it for a paragraph and you will often get a heading, three bolded lead-ins and a bulleted breakdown — a shape that reads as organised rather than as written. The habit survives into prose: even when the formatting is stripped out, the underlying sentences tend to be short, declarative and self-contained, each carrying one fact, arranged as though they were still bullets that lost their markers.
Formatting where prose was asked for
Headings, bold lead-ins and bullets appearing in a request that never called for them. This is the most visible tell and the first thing people paste away before submitting.
One-fact sentences
Short declaratives that each carry exactly one claim and rarely subordinate one idea to another, giving paragraphs a list-like cadence even without the bullets.
Bolded key terms mid-sentence
Emphasis applied to nouns the reader is presumed to be scanning for, a summarising habit rather than a writing one.
The recap close
A short closing block that re-lists what was just covered, functioning as a summary of a piece too short to need summarising.
These are patterns a careful reader can notice. The detector itself does not work from a list of banned words — it scores lexical and structural patterns across the whole document and every sentence in it, which is why rephrasing around a word like delve does not clear a document.
The hard part
Why stripping the formatting is not enough
The usual way people disguise Gemini output is cosmetic: delete the bullets, unbold the terms, join the fragments into paragraphs. That removes what a human notices while leaving what a detector measures. Sentence length distribution, clause depth and the way information is packed per sentence all survive reformatting, because they are properties of how the text was composed rather than of how it was laid out. This is also why the report scores every sentence — reformatted text often has a small number of genuinely machine-shaped sentences sitting inside otherwise unremarkable prose, and a document-level number alone would hide them.
How a scan runs
What the Gemini detector actually returns
Paste the text — from about fifty words up to 2,500 in one free scan. The engine scores joint lexical and structural patterns across the whole document and every sentence in it, then reconciles those into one verdict: Human-Written, AI-Assisted, or AI-Generated. A mixed Gemini draft does not collapse into a single misleading average.
You get 50 free scans a day with no account and no card. Text is scored in memory and discarded when the response returns. Nothing is retained for training. The privacy policy in the footer is the longer version of that sentence.
The percentage backs the verdict beside it — how human the passage reads for a Human-Written verdict, how likely it is that a model wrote it for an AI one. The verdict is calibrated per length band, so the same raw score on a short snippet and a long essay is not the same finding. Read the sentence shading before you act on the number — the reasoning is the part you can actually check.
No detector is proof of authorship. False flags cluster on formal prose, technical writing, and fluent English written as a second language. Missed detections cluster on heavily edited machine drafts. Treat a report on Google's Gemini as evidence to weigh, not as a finding about a person.
Gemini reaches for structure earlier than the other major models, and that habit survives into prose even when the formatting is gone. The underlying sentences tend to be short, declarative, and self-contained, each carrying one fact, arranged as though they were still bullets that lost their markers. That is a compositional property, not a markdown property.
Scoring is based on writing patterns rather than a per-product fingerprint, so this is not restricted to one Gemini tier. AI Overviews-style blurbs are often too short to score well; paste the fuller source when you have it.
No detector is proof of authorship. Treat the report as evidence to weigh, especially on short or reformatted text, and not as a finding about a person. Text is scored in memory and not stored.
Who this is for
When a Gemini detector is the right tool
Use this page when the suspected source is Google's Gemini — including drafts that no longer look like Gemini because someone stripped the headers and bullets. Formatting is what a person notices. Composition is what the scanner measures.
A paste that still has the briefing-note furniture
Headings, bold lead-ins, nested bullets in a request that asked for prose. That is the most visible tell and the easiest case. The detector still scores the sentences underneath, not the markdown.
The same text after a cosmetic clean-up
Bullets deleted, labels unbolded, fragments joined into paragraphs. The one-fact-per-sentence cadence usually survives. A document-level percentage can hide a few machine-shaped lines inside otherwise ordinary prose — that is why every sentence is scored.
Short Gemini answers and AI Overview-like blurbs
Very short passages of any origin are harder to call. The report needs roughly fifty words before it will score, and confidence rises with length. A two-sentence paste is not enough material for the statistics to mean anything.
Not: flagging a human who writes in lists
Formatting alone does not produce an AI verdict. A person who thinks in bullets is not what the model keys on. Read the sentence report; if the only 'signal' is structure you asked for, the document is probably yours.
Limits
What a report cannot do
We do not publish a per-model accuracy figure for Gemini, or a head-to-head against GPTZero, Turnitin, Originality.ai, or anyone else. Vendor-measured numbers describe the vendor's own test set, not your document. The tells on this page are patterns a careful reader can notice; they are not how the detector works internally and not a banned-word list.
Do not use a report as the sole basis for a grade, a disciplinary outcome, or a hiring decision. Weigh it against drafts, version history, and a conversation with the writer. The FAQ at /faq covers this in more depth because it is the question that actually matters.
Short passages are genuinely hard. Below a few dozen words, any detector's output degrades toward noise. If you only have a sentence or two, the honest move is not to run a scan that will look more confident than it is.
FAQ
Gemini detection FAQs
What the detector can tell you about Google's Gemini, what it can't, and how to read a result you're not sure about.
Can you detect text written by Google Gemini?
Yes. Paste the text for a verdict of Human-Written, AI-Assisted, or AI-Generated, plus sentence-level shading. Gemini's tendency toward heavily structured output gives it a distinctive shape, though the detector scores the composition of the sentences rather than the presence of bullets.
I removed all the bullet points. Will it still detect it?
Usually. Formatting is a surface property; what is measured is how the sentences are built — their length distribution, clause depth and information density. Those survive reformatting, which is why cosmetic clean-up is a weaker disguise than it feels like.
Does it cover Gemini Pro, Flash and the AI Overviews text?
Scoring is based on writing patterns rather than a per-product fingerprint, so it is not restricted to one Gemini tier. Very short passages of any origin are harder to call — the report needs roughly fifty words before it will score, and confidence rises with length.
My own writing uses lots of bullet points. Will it be flagged?
Formatting alone does not produce an AI verdict, and a human who writes in lists is not what the model keys on. Detection is tuned to minimise false flags on genuine human writing, and the sentence-level report lets you see exactly which passages carried signal rather than asking you to trust a single number.
Is the Gemini detector free?
Yes — no account and no card. Daily limits are shown on the scanner.