Essay Plagiarism & AI Checker
Check any essay for AI-generated content and plagiarism in one scan. Get sentence-level results that show exactly which parts were written by AI and which may be plagiarized.
How to Check Your Essay for AI Content
Three simple steps to detect AI content in your Essay.
Paste Your Text
Paste your text or upload a document. We support PDF, DOCX, and TXT formats for Essay detection.
AI Analyzes for AI Patterns
Our multi-model detection engine analyzes every sentence for AI-generated writing patterns and statistical signatures.
Get Sentence-Level Results
Receive a detailed report with per-sentence confidence scores, highlighting exactly which portions are AI-generated.
Why Check Your Essay for AI Content?
Essays are the most common document type submitted for AI detection. Students, educators, and academic institutions need reliable tools to verify essay authenticity. Plagly.ai's Essay Checker combines AI detection with plagiarism checking in a single scan, analyzing every sentence for signs of AI generation from ChatGPT, Claude, Gemini, and other models while simultaneously cross-referencing against billions of web pages and academic sources. The result is a comprehensive report that shows sentence-level AI probability scores alongside plagiarism matches. Whether you are a teacher reviewing a stack of student essays or a student verifying your own work before submission, Plagly provides the detailed, actionable analysis you need.
Learn more about our technologyEssay
Plagly's engine is optimized for Essay analysis, understanding the specific formatting and content patterns typical of this document type.
Key Features
Everything you need to detect AI in your Essay with confidence.
AI + Plagiarism in One Scan
Check your essay for both AI-generated content and plagiarism simultaneously, saving time with a single comprehensive analysis.
Sentence-Level Analysis
Every sentence in your essay is individually scored for AI probability, making it easy to identify specific flagged sections.
Confidence Scores
Clear percentage scores show how confident the detector is about each flagged sentence.
Multi-Format Support
Paste your essay text or upload it as a PDF, DOCX, or TXT file for instant scanning.
Privacy Protected
Your essay is analyzed without storage. It will never appear in our database or be shared.
Free to Use
Quick essay scans are free with no signup. Full reports available with a free account.
How to Check Essay Content for AI
What to watch for when checking essay content for AI:
- A generic thesis with no personal specifics, examples, or voice.
- Even paragraph structure wrapped around a thin or repetitive argument.
- Vocabulary or tone that jumps above the student's usual writing.
- Smooth transitions with no digressions, false starts, or personality.
- Citations that are vague, mismatched, or that do not quite support the claim.
Why essays get false-flagged more than anything else
Essays are the single worst case for AI detection, and it is worth being blunt about why: schools spend years teaching students to write in exactly the register that detectors score as machine-like. If you are checking an essay, read this before you act on a percentage.
The five-paragraph template is the problem
Thesis, three body paragraphs with topic sentences, restating conclusion. That structure is drilled into students precisely because it is predictable — and predictability is what detectors measure. A well-taught essay and a generated essay share a skeleton.
Non-native writers are hit hardest
Students writing in a second language often use a narrower, safer vocabulary and more uniform sentence lengths. Both push perplexity and burstiness scores toward the generated end. Multiple studies have found this group flagged at markedly higher rates, and it is the most common way detectors cause real harm.
Heavy editing looks like generation
A student who drafts, revises and polishes removes exactly the irregularities that mark text as human. Conscientiousness reads as machine output, which is a genuinely perverse incentive.
What actually settles it: process, not product
Version history, draft timestamps, comments, and the student being able to explain their own argument in conversation. Any of these is worth more than a detector score, because they are evidence about how the text came to exist rather than inference from its surface.
Use a score to decide whether to look closer, never as the finding itself. Every result here lists the specific sentences behind the number so you have something concrete to discuss — an accusation built on a percentage alone is not one you can defend, and should not be made.
Frequently Asked Questions
Common questions about checking Essays for AI content.
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