Free AI Checker for Essays

Paste your essay and see which sentences read as AI-written, and why: stock AI phrases, flat sentence rhythm and formal transitions. Free, no sign-up.

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Key Takeaways: Checking an Essay for AI Patterns

AI writing is recognisable by combinations of patterns, not single words: stock phrases, uniform sentence length and stacked transitions.
This free checker measures each pattern separately and highlights the exact sentences that triggered it.
It runs in your browser with no sign-up; your text is not uploaded.
Scores are an estimate, not the model Turnitin or GPTZero uses, so use them to decide what to revise.

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From the Conch team

What makes writing read as AI-generated

AI writing rarely gives itself away with one word. It is the combination: stock phrases ("it is important to note", "plays a pivotal role"), sentences that are all about the same length, and paragraphs that march through "Furthermore… Moreover… Additionally…". This checker measures each of those patterns separately and highlights the sentences where they show up, so you can see exactly what to rewrite instead of staring at a single score.

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Conch Tip: Fix the flagged sentences first, then read the paragraph out loud. If every sentence has the same rhythm, break one long sentence up and merge two short ones.

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Frequently Asked Questions

How does this AI checker work?

It measures three patterns common in AI-generated writing: stock AI phrases, how much sentence length varies, and how often sentences open with formal transitions like "Furthermore". Each one is scored, combined into an overall estimate, and the sentences that triggered them are highlighted.

Is this the same as Turnitin or GPTZero?

No. Those tools use their own trained models, which are not public. This checker uses transparent writing patterns instead, so its score can differ from theirs. It is most useful for finding the passages that read as machine-written so you can revise them.

Can a human-written essay be flagged?

Yes. Formal academic writing often uses transitions and set phrases, and short texts give noisy results. That is why the checker shows the reason for every flag and needs at least 80 words before giving an overall reading.

Is my text stored or sent anywhere?

No. The analysis runs entirely in your browser. Your text is not uploaded to a server.

How do I make my writing sound more human?

Rewrite the highlighted sentences in your own words, vary sentence length, cut stock phrases and filler transitions, and add specific details or opinions only you would include. Conch's AI Humanizer can help rewrite flagged passages while keeping your meaning.

Is the AI checker free?

Yes. It is free, needs no sign-up, and has no word limit beyond 5,000 characters per check.

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