Plagiarism Checker

Paste your text and get an originality score, highlighted matching passages, and direct links to every source where similar content was found.

Live Demo

INPUT

The Industrial Revolution marked a major turning point in history. Beginning in Britain in the late 18th century, it brought about fundamental changes in agriculture, manufacturing, and transportation that profoundly affected socioeconomic and cultural conditions.

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OUTPUT

Originality Score: 94% — 2 passages flagged.

Sentence 3 shows 87% similarity to Wikipedia article "Industrial Revolution." Sentence 5 closely matches a published textbook passage. The remaining content appears to be original work with proper paraphrasing.

INPUT

In the world of web development, choosing the right framework can make or break your project. React has emerged as one of the most popular choices among developers, thanks to its component-based architecture and virtual DOM implementation that ensures efficient rendering.

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OUTPUT

Originality Score: 100% — No matches found.

Content appears to be fully original. No significant similarities detected across our database of over 1 billion web pages, academic papers, and published works. Safe to publish.

INPUT

Artificial intelligence is the simulation of human intelligence processes by computer systems. These processes include learning, reasoning, and self-correction. Particular applications of AI include expert systems, natural language processing, and speech recognition.

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OUTPUT

Originality Score: 72% — 4 passages flagged.

Sentence 1 is a near-exact match to the Wikipedia definition of AI (96% similarity). Sentences 2-3 closely match content from TechTarget.com and IBM Knowledge Center. Consider rewriting flagged sections with original phrasing.

Why Choose Our AI Plagiarism Checker

Deep Scan

Checks your text against a broad index of web pages, published articles, and academic sources in one pass

Source Detection

Every flagged passage is traced back to its origin, so you know exactly where the match came from and can decide how to handle it

Similarity Report

The report shows your overall originality score alongside color-highlighted segments, so problem areas are visible at a glance

Instant Results

Analysis runs in seconds regardless of document length, so you can review and revise without waiting

Perfect For

Academic Papers Blog Content Research Students Publishers Content Teams

How It Works

AI Plagiarism Detection Engine

The checker splits your submission into overlapping segments and runs each against a broad index of web pages, academic papers, and published works. Exact phrase matches and close paraphrases are both flagged, not just word-for-word copies.

Results come back as a structured report: an overall originality percentage, color-coded passage highlights within your text, and a source list with direct URLs. You can review each match individually and decide whether to rewrite, cite, or leave the passage as-is.

Frequently Asked Questions

Paste your text into the input field and submit. The checker breaks the text into overlapping segments and compares each one against an index of web content, academic databases, and published works. Matching passages are flagged and tied back to their sources, and you receive an originality percentage along with a highlighted view of your document.

The tool works best on English text, where source coverage is widest. Other languages are supported, though the indexed source pool for non-English content is smaller, which may affect how many matching sources are returned.

Yes. The detection engine looks for close paraphrases and structural rewrites, not only word-for-word copies. If a passage closely mirrors a known source even after synonym substitution or sentence restructuring, it will still appear in the report.

The originality score is the percentage of your text that returned no matches in the source index. A score of 95% means 5% of the content had passages similar to something already indexed. The score is a starting point for review, not a pass/fail verdict. Quoted material and properly cited passages may still appear as matches.

The tool accepts pasted text directly in the input field. Copy and paste the content you want checked from any source, whether it is a draft document, a web article, or a student submission.

Most checks complete in seconds. Longer documents take a little more time as more segments need to be scanned, but you typically have results within a few seconds of submitting.

Quoted passages that match a source will still be flagged, because the checker compares text without interpreting citation marks. Review the flagged passages yourself and exclude any that are properly attributed quotes. The report gives you enough detail to make that distinction quickly.

Students use it to verify assignments before submission. Writers and bloggers check drafts to catch unintentional overlap with existing articles. Publishers and editors screen submitted work before accepting it. Content teams run checks on outsourced copy before publishing. Essentially, anyone responsible for original written content has a reason to verify it.

The text you submit is used only to run the check and return the report to you. It is not shared with third parties or used to train models. Save the report yourself if you need a record of the results.

Submit the final version of your text, not an early draft, so the check reflects what you actually plan to publish or submit. If you are checking a long document, read through the flagged passages carefully. Some matches will be common phrases or technical terms that are not a concern. Focus your attention on flagged blocks of several words or more that closely follow a specific source.

Free Plagiarism Checker: AI Originality Score Online vs Other Methods

Feature	Luxoret AI	Manual / Traditional	Other Tools
Speed	Ready in seconds	Hours of writing	Minutes per piece
Skill Required	None — describe what you need	Strong writing skills	Prompt engineering
Variations	Unlimited instant rewrites	Time-consuming revision	Limited by credits
Languages	Multi-language support	Writer's native language	Limited language options
Consistency	Consistent tone and style	Varies by writer	Template-dependent

Plagiarism Checker

Plagiarism Check Results

Flagged Passages

Why Choose Our AI Plagiarism Checker

Deep Scan

Source Detection

Similarity Report

Instant Results

Perfect For

How It Works

AI Plagiarism Detection Engine

Frequently Asked Questions

Free Plagiarism Checker: AI Originality Score Online vs Other Methods

Plagiarism Checker

Plagiarism Check Results

Flagged Passages

Why Choose Our AI Plagiarism Checker

Deep Scan

Source Detection

Similarity Report

Instant Results

Perfect For

How It Works

AI Plagiarism Detection Engine

Frequently Asked Questions

Free Plagiarism Checker: AI Originality Score Online vs Other Methods

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