๐ Plagiarism Checker
Compare two texts and measure similarity percentage free. Find matching passages instantly. Browser-based, private, no upload.
๐ Plagiarism Checker
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About the Plagiarism Checker Tool
This tool compares two pieces of text you supply and reports how similar they are, highlighting the passages that overlap. It is a direct comparison between documents you already have โ useful for checking whether a rewrite is genuinely different from its source, or whether two submissions share content.
It is worth being precise about what this is not: it does not search the internet or any academic database. A true plagiarism check requires comparing against billions of indexed documents, which is what services like Turnitin do. This is a two-document comparison, running privately in your browser, which makes it useful for exactly the cases where you know both texts.
How to Use Plagiarism Checker
- Paste the first text into the left input area.
- Paste the second text into the right input area.
- Press Compare to analyse the overlap.
- Review the similarity percentage and the matching passages identified.
When to Use This Tool
- Checking whether a rewritten article is sufficiently different from its source
- Comparing two student submissions for shared content
- Verifying that spun or paraphrased content is genuinely distinct
- Checking product descriptions across pages for duplicate content issues
- Comparing draft versions of a document to see how much changed
Things Worth Knowing
- This compares only the two texts you provide โ it does not search the web or any database.
- Similarity percentage is a guide, not a verdict. Common phrases and technical terminology inflate the score legitimately.
- For institutional plagiarism detection, a database-backed service is required.
Quick Facts
| Tool name | Plagiarism Checker |
| Category | Text Tools |
| Price | Free โ no account, no trial, no watermark |
| Where it runs | Entirely in your browser (client-side) |
| Files uploaded | None โ your data never leaves your device |
| File size limit | None imposed; limited only by device memory |
| Works offline | Yes, once the page has loaded |
| Platforms | Windows, macOS, Linux, Android, iOS |
Frequently Asked Questions
Does this check my text against the internet?
No. It compares only the two texts you paste. Searching the web for matches requires a crawled index of billions of pages, which is what commercial plagiarism services provide.
What similarity percentage is acceptable?
It depends entirely on context. Technical writing naturally shares terminology and can legitimately show 20โ30% overlap. Creative writing showing the same figure would be concerning. Read the highlighted passages rather than trusting the number alone.
Is my text stored or sent anywhere?
No. Comparison runs in your browser and nothing is transmitted, which matters for unpublished work.
Can it detect paraphrasing?
Only partially. The comparison works on textual overlap, so heavily reworded content with the same meaning will score low. Semantic similarity detection requires different technology.