What is an AI content detector?
An AI content detector estimates whether a piece of text was written by a language model or by a person. In this tool, a language model reads the text and judges it: it looks at vocabulary patterns, how much sentence length and structure vary, how specific the details are, repetition, hedging and emotional depth. It then gives an overall assessment (likely AI, likely human or mixed), how confident it is, the signals it found with quotes from your text, and suggestions to make the writing sound more like a person.
That is a different method from the AI writing checker on Toolz, which measures style signals with fixed rules and no model at all. Running both on the same text gives you two independent views. The sample on the page is a short paragraph of stock phrases about a "fast-paced digital" world and a "holistic approach", with no names, numbers or examples, and the detector should quote exactly those phrases back as the tells.
Read this part before using the result on anyone. No detector can prove who wrote a text, and this one says so in every report. Careful human writing can read as AI; edited AI text can read as human. Non-native English writers are flagged unfairly more often by detectors in general, because plain, regular phrasing looks machine-like. A 1B model such as the one here also has less to go on than a large one. Never use an estimate like this as the only evidence against a student, an employee or a freelancer.
The check runs on the Toolz server. The text is sent over HTTPS, the server builds the prompt and runs Gemma 3 1B, a small open model from Google, with Ollama, and the report streams back as it is written. The text is used to write the report and then discarded: it is not stored or logged, not used to train any model, and not sent to any third-party AI company, which matters when it is someone else's essay or an unpublished draft.
It is free with no signup, within about 20 checks per 10 minutes and up to 8,000 characters per check. The better alternatives for real decisions are asking the writer about their process, looking at drafts and version history, or a conversation about the work.
How to check if text is AI-generated
Paste the text
Use at least a few paragraphs. A sentence or two gives the model too little to judge, and the assessment gets closer to a guess.
Press Analyze text
The assessment streams in as it is written, usually within a few seconds.
Read the signals, not only the verdict
Look at the quoted phrases and the confidence level. The quotes tell you far more than the likely AI or likely human label.
Revise or cross-check
Use the suggestions to make your own writing more specific, or run the AI writing checker for a second, rule-based view. Copy or download the report.
What the AI content detector does
Likely AI, likely human or mixed
An overall assessment with a confidence level, rather than a falsely precise percentage.
Quoted evidence
Every signal is backed by a quote from your text, so you can judge whether the reasoning holds up.
Six kinds of signal
Vocabulary, sentence variation, specificity, repetition, hedging and emotional depth are each considered.
Suggestions to sound human
Concrete edits for your own drafts, such as replacing a stock phrase with a real example or varying sentence length.
Frequently Asked Questions
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