Free AI Text Detector — Analyze Any Text for AI
Analyze any text to determine if it was written by a human or generated by AI. Multi-signal detection for ChatGPT, Claude, Gemini, and more.
Paste text & click Analyze, or try a sample
What Is an AI Text Detector?#
An AI text detector is a specialized tool that analyzes written content to determine whether it was produced by a human writer or generated by an AI language model. Unlike plagiarism checkers that compare text against existing sources, an AI text detector examines the inherent statistical properties of the writing itself to make this determination.
How AI Text Detection Differs from Plagiarism Detection#
Plagiarism detection tools like Turnitin's originality checker compare submitted text against a database of existing documents, web pages, and student papers to find matching content. AI text detection is fundamentally different — it analyzes how the text was written, not whether it matches existing content. AI-generated text can be completely original (not plagiarized) while still being machine-generated.
What Our AI Text Detector Analyzes#
Our AI text detector examines five key signals: perplexity (how predictable the word choices are), burstiness (variation in sentence complexity), sentence uniformity (consistency of structure), formal transition frequency, and vocabulary repetition patterns. Together, these signals provide a comprehensive picture of whether text was human-written or AI-generated.
Use Cases for AI Text Detection#
AI text detection is valuable for educators checking student work, publishers verifying content authenticity, hiring managers reviewing application materials, content marketers ensuring human-written output, and researchers maintaining academic integrity. Our free AI text detector serves all these use cases without requiring accounts or subscriptions.
Pair with Plagiarism Detection#
For comprehensive content verification, use our AI text detector alongside the plagiarism checker. Together, they verify that content is both original (not copied) and human-written (not AI-generated). Both tools are completely free on aichecker.tech. Want to understand the technology? Read how AI detectors work.