Plagiarism Checker

Get an originality score for your text and see which phrases may be at risk. AI-powered analysis of copy-paste patterns and writing style consistency.

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AI Plagiarism & Originality Checker

Get an originality score for your text and see which phrases may be at risk. AI-powered analysis of copy-paste patterns and writing style consistency.

Key Capabilities

How does the originality checker work?

It analyzes text for structural patterns, syntax repetition, and stylistic uniformity that are characteristic of duplicated or heavily templated content. It does not perform active internet searches, preserving your privacy.

What does the originality score mean?

The score represents the likelihood that the text was written organically. A higher score indicates natural variation in sentence structure and vocabulary, while a lower score suggests heavily formulaic or repetitive patterns.

How to Use

Input your content

Open the Plagiarism Checker tool and paste your text, upload a document, or type directly into the input area.

AI processes your request

The AI model analyzes your content and generates results. Processing typically takes 3-10 seconds depending on document length.

Review and use results

Review the AI-generated output. Edit, copy, or download the results for your use.

Frequently Asked Questions

How does the originality checker work?

What does the originality score mean?

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AI-Powered Document Intelligence — How Our Tools Work

Large Language Models for Document Processing

DoctorDocs AI tools are powered by state-of-the-art large language models (LLMs) including our in-house vision model trained on 1M+ labelled documents for cloud processing and quantized open-source models for in-browser execution. LLMs are neural networks trained on trillions of words of text, enabling them to understand context, grammar, tone, and meaning at a level approaching human comprehension. When you paste text into our AI Summarizer, the model reads the entire document, identifies key themes and facts, and generates a concise summary — not by copying sentences, but by genuinely understanding and rephrasing the content.

In-Browser AI vs Cloud AI

Some of our AI tools run entirely in your browser using WebAssembly and ONNX Runtime. These in-browser models are smaller (typically 50-200MB) and run on your device's CPU, meaning your text is never sent anywhere. The trade-off is that in-browser models are less capable than full cloud models. Our cloud-powered tools (like the Document Summarizer and Translator) send your text to our secure cloud models via encrypted API calls. The text is processed in real-time and immediately discarded — it is never stored, logged, or used to train models. We clearly label which tools use cloud processing and which are fully local.

AI Text Detection Explained

Our AI Text Detector uses a specialized RoBERTa neural network model (a variant of BERT) that has been fine-tuned to distinguish human-written text from AI-generated text. The model analyzes patterns like vocabulary diversity, sentence length variation, perplexity (how predictable the next word is), and burstiness (variation in sentence complexity). Human writing tends to have more irregular patterns — mixing short and long sentences, using unexpected vocabulary, and making occasional grammatical quirks. AI-generated text tends to be more uniform and predictable. The entire model downloads to your browser and runs locally, so your text is never sent to any server.

Limitations and Responsible Use

AI tools are powerful but imperfect. Summaries may occasionally miss nuances. Translations may not capture cultural idioms perfectly. Grammar checkers may flag stylistic choices as errors. AI text detection has a baseline accuracy rate and can produce both false positives and false negatives. We encourage users to treat AI tool outputs as helpful starting points that benefit from human review. For critical documents — legal contracts, medical reports, academic submissions — always have a human expert review the AI output before taking action.