AI-written text is now common in essays, articles, and research drafts. Plagiarisma’s free AI content detector helps you estimate whether a passage was written by a language model such as ChatGPT, Claude, or Gemini. Paste your text or upload a document and get a clear signal based on linguistic patterns, structure, and phrasing. It is a practical check for students, editors, and teachers — not a courtroom proof of authorship.




    



Valid file formats - [PDF] [DOCX] [RTF] [TXT] [HTML] [PPTX] [XLSX] [XLS] [FB2] [ODT] [EPUB] [MS WORD DOC]


How to Detect AI-Written Text in 3 Simple Steps

1. Paste your text or upload a file (PDF, DOCX, TXT, and more)

2. Click “Analyze Text”

3. Review the result and the passages most likely to be machine-written

Who Can Benefit from This AI Detector

• Students — Check drafts before submission and see where a rewrite sounds too mechanical

• Teachers and educators — Screen essays and assignments for likely AI-generated sections

• Editors and publishers — Flag articles that need a human rewrite before publication

• Researchers — Review paper drafts for passages that lack original phrasing

• Content teams — Keep brand writing consistent and less generic

Why Choose Plagiarisma

• Fast check against patterns typical of major language models

• Works with pasted text and common file formats

• Free for standard checks, no registration required

• Useful next to the plagiarism checker and paraphrasing tool

• Multilingual support for mixed-language drafts

• Available on the web, as a Windows app, and via browser extensions

How to Read and Improve an AI Detection Result

An AI detector estimates likelihood. It does not prove who wrote a text. Use the result as a editing signal, then revise the passages that sound generic.

1. Treat the score as a signal, not a verdict

A high AI likelihood means the wording matches patterns common in model output. A low score does not guarantee a human author. Short texts and heavily edited drafts are easier to misread.

• Check the highlighted passages, not only the overall percentage.

• Re-run the check after you rewrite the flagged sections.

• Do not rely on one tool for academic misconduct decisions.

2. Rewrite flagged sections in your own voice

Generic transitions and evenly polished sentences are what detectors often mark. Replace them with specific detail.

• Add a concrete example, number, or observation only you would include.

• Vary sentence length instead of keeping every sentence the same shape.

• Cut stock phrases such as “it is important to note” and “in conclusion, it is clear.”

3. Keep citations and claims checkable

AI drafts often invent sources or smooth over weak evidence. If a passage is flagged, verify every citation and rewrite unsupported claims.

4. Use detection together with a plagiarism check

AI text can still overlap with published sources. Run the originality checker after you revise, so you catch both machine-like phrasing and copied passages.

The goal is clearer writing that reflects your own reasoning, not a score to game.

Detect AI Content Now

Paste your text above and get an AI writing estimate in seconds.


Is the AI content detector free?

Yes. A standard AI check is free and does not require registration. Paste your text or upload a file to get a result.

Can it detect ChatGPT, Claude, and Gemini?

It looks for linguistic patterns common in output from major language models, including ChatGPT, Claude, and Gemini. It estimates likelihood; it does not name the exact model with certainty.

Is a high score proof that AI wrote the text?

No. The score is a signal, not proof of authorship. Short texts, edited drafts, and formulaic human writing can be misread. Use the result to review flagged passages, not as a final verdict.

Are my texts stored after the check?

No. Texts submitted for a standard check are not stored in a public database and are not shared with other users.