Is the AI checker really free for teachers?

Yes. You can check up to 500 words per scan with no account at all, and a free account raises that to 1,000 words with checks that renew daily. There is no education license, procurement process, or trial that expires. If you grade heavy volumes, Pro is $10/month and removes daily limits (up to 5,000 words per scan).

How accurate is it on student essays?

Like every AI detector, it is probabilistic — there is no tool that can prove authorship. What it gives you is an overall score, per-sentence probabilities, and a confidence band. Scores at the extremes (very high or very low) are the most reliable; results in the middle range explicitly say "recommend human review." Short or heavily formulaic assignments are the hardest to score for any detector.

What about false positives on genuinely human work?

They happen with every detector, and pretending otherwise would be dishonest. Polished, formal writing with uniform sentence lengths can look statistically AI-like, and research — including a widely cited Stanford study — found detectors flag work by non-native English speakers at much higher rates. That is why a score should never be the sole evidence in an academic-integrity decision.

How should I talk to a student about a flagged assignment?

Start with a conversation, not an accusation. Show the flagged sentences and ask the student to walk you through their process: outlines, drafts, sources, and revision history (Google Docs version history is very useful here). Ask them to explain word choices or arguments from the flagged passages. Students who wrote the work can usually do this easily; the conversation itself is more informative than any percentage.

Does it integrate with Google Classroom, Canvas, or Moodle?

There are no native LMS plugins — being direct about that. The workflow is copy and paste: open the submission in your LMS, copy the text, paste it into the checker, and read the results. Each check takes seconds, so working through a class set back-to-back is realistic even without an integration.

Is student text stored or shared?

Pasted text is processed to produce the analysis and is not published or shared with third parties. Nothing becomes public unless you deliberately create a share link for a specific report. Avoid pasting personally identifying details you would not put in any web tool — good practice with any online checker.

Can my students use it to check their own drafts?

Yes, and many do. Students paste a draft before submitting, see which sentences score high, and revise or document their writing process. Self-checking turns the detector into a teaching tool rather than a trap — some teachers even walk through a scan in class to show how AI-flavored writing reads.

For educators

AI Checker for Teachers

Check whether student work reads as ChatGPT, GPT-5, Claude, or Gemini — free, with no signup and no institutional license. Sentence-level highlighting shows you exactly which lines drive the score, so the follow-up conversation is concrete instead of accusatory.

Check student work free

500 words per check with no account — 1,000 words with a free one.

How teachers use it

Paste the student’s work

Copy the submission from your LMS, Google Doc, or email and paste it into the free AI checker. Up to 500 words per check with no account; a free account raises that to 1,000 words with daily checks.

Read the sentence-level results

You get an overall AI score, a probability for every sentence, the specific warning signals that fired, and a confidence band that tells you how much weight the score deserves.

Decide what happens next

Treat the score as a signal, not a verdict. For flagged work, compare it against the student’s past writing, ask about their process, or request a short supervised sample before making any integrity decision.

The honest part: false positives are real

Every AI detector — this one included — produces probabilities, not proof. Some genuinely human writing gets flagged, and some AI writing slips through. Two patterns deserve particular care in a classroom:

Polished, formal writing looks AI-like. Uniform sentence lengths, careful transitions, and textbook grammar are exactly the statistical patterns detectors associate with AI. Your strongest, most careful writers are the ones most likely to be flagged unfairly.
Non-native English speakers are flagged more often. A widely cited Stanford study found that leading detectors flagged the majority of essays written by non-native speakers as AI-generated. If you teach multilingual students, weight detector scores accordingly.

That is why an AI score should never be the sole evidence in an academic-integrity decision. Use it as a screening signal alongside things a score cannot fake: draft history, in-class writing samples, and a conversation with the student. Our results reflect this — mid-range scores explicitly say “recommend human review” instead of pretending to certainty.

Using it with Google Classroom, Canvas & Moodle

There are no native LMS plugins — the workflow is copy and paste, and it works the same with every LMS. Each check takes a few seconds.

Google Classroom

Open the student’s Doc from the assignment, select all and copy, then paste into the checker. Bonus: Docs version history (File → Version history) is independent evidence of how the essay was actually written.

Canvas

In SpeedGrader, open the submission preview, copy the essay text, and paste it into the checker in another tab. Keep the checker tab open while you grade — the loop is copy, paste, scan, next student.

Moodle

Open the assignment submission (online text or an uploaded document), copy the text, and paste it in. For file uploads, open the file first — the checker works on pasted digital text, not scans or photos.