Gemini detector
What the Gemini detector does
The Gemini detector is a free Gemini AI detector: paste in a paragraph, essay, email or comment, and it checks the writing against habits typical of Gemini, Google's assistant. It answers the question people type into a search bar, is this written by Gemini, with a plain-language list of what it found and why, not a single score dressed up as a verdict.
This is a server tool, not a browser script. Your text is sent to our AI server to be scored; you get 5 free checks in any rolling 24 hours. There's no account to create, and no text you paste is needed twice.
What comes back is a list, not a verdict. A detector that returns a bare number asks you to trust it blind; this one names each pattern it found (a bolded lead-in, an over-structured answer, an unnecessary table) so you can weigh the evidence yourself.
How it works
How to check text for Gemini writing in three steps
It takes less time than reading the result does. There's no file upload, no formatting to strip out first, and nothing to configure before you run the check: paste, run, read.
- Step 1
- Paste the text you want checked. A paragraph is enough to run; a full page gives the check more to work with.
- Step 2
- Press Check text. It goes to our AI server once, gets scored against Gemini's writing patterns, and the result comes back to the page.
- Step 3
- Read each flagged signal and the reason behind it, then judge for yourself. The detector explains its reasoning; it doesn't hand down a ruling.
Gemini's writing patterns
How Gemini's writing actually differs
Gemini's training leans hard on structure, and that habit shows up even when text is pasted somewhere the formatting doesn't survive. None of these prove anything alone: stacked across a page, they're what a Gemini checker reads for.
- Bolded lead-ins
- A short bolded phrase opening a sentence or bullet, then a colon, then the point, a habit Gemini reaches for constantly in longer answers.
- Tables where a sentence would do
- A reflex to lay out a comparison as a table even for two or three items a paragraph could carry easily.
- Exhaustive itemisation
- A tendency to break even a short answer into a bulleted list covering every angle, rather than picking the two that matter.
- “Here's a breakdown” framing
- An explicit announcement that structure is coming, right before it arrives.
- Layered caveats
- A cautious, hedged closing note added after an otherwise confident answer, covering an edge case nobody asked about.
- Heading-like fragments
- Short noun-phrase headers standing in for a full sentence, carried over from Gemini's markdown formatting even in plain text.
Straight answer
Can you tell which AI model wrote something?
Not with certainty. Gemini, ChatGPT and Claude train on overlapping data and keep converging on similar phrasing, so the tells that separate them are a matter of degree, not a fingerprint.
A system prompt changes almost everything, too: tell a model to write short, unstructured prose with no headers or bullets, and most of its default profile disappears. That's why this tool reports patterns typical of Gemini's default voice, not a claim about which model, or which person, wrote a piece of text. Treat a match as a lead worth a closer look, never an answer on its own.
Why flags happen
Why false positives happen
The patterns a Gemini checker looks for are also, in places, just good writing. Bolded lead-ins and tables are legitimate formatting choices that a lot of human writers reach for on purpose to make dense material scannable. A house style built around structured, itemised answers reads the way Gemini does, for reasons that have nothing to do with a model.
Technical writers and people documenting a process get flagged often, unfairly. Breaking a comparison into a table, or leading a bullet with a bolded term, is standard technical-writing practice, taught long before Gemini existed. A false positive here isn't a flaw in the writer; it's a flaw in treating structured, formatted prose as proof of anything by itself.
If you're flagged
What to do if you're accused of using Gemini
A flag is a signal, not a verdict; no one should treat it as one. If someone has raised it against your work, the strongest response is evidence of your process, not an argument about the detector.
- Keep your drafts
- Earlier versions, outlines and notes are the plainest evidence a piece grew, rather than appearing whole.
- Keep version history on
- Google Docs, Word and most editors log revisions automatically. Don't clear it while a question is open.
- Be ready to talk through the work
- Someone who wrote a piece can usually explain a specific choice in it. That's harder to fake than the prose itself.
- Ask what the flag actually found
- A named signal (a bolded lead-in pattern, an overbuilt table) can be discussed on its merits. A bare score can't.
Who uses it
Who uses the Gemini detector, and when
Same tool, several reasons to open it.
- Editors and publishers
- Screening submissions for signs of an unedited Gemini draft before it reaches a human editor's time.
- Teachers
- Getting a second opinion on writing that reads unusually polished, as one input among several, not a grading tool.
- Hiring teams
- Checking a writing sample or cover letter for a voice that doesn't match the interview.
- Writers checking their own work
- Running a draft through before submitting it, to see whether their own habits read as machine-made.
- Community moderators
- Getting a quick read on a wall of posts that all arrived sounding oddly alike, before deciding whether to look closer.
Free checks
How many free Gemini detector checks you get, and why
This is a server tool: your text travels to our AI server to be scored, then the result travels back. That round trip makes the check possible, and it's why there's a limit.
You get 5 free checks in any rolling 24 hours, tracked without an account, on a ceiling that resets on a rolling clock, not a fixed hour. Five is enough for most real uses: one submission, one email, one flagged paragraph at a time.