Check Your Work For Plagiarism With Our Free Plagiarism Checker
Paste your essay or assignment and get an instant originality score, flagged passages and matching web sources. Plus, get the expert help you need to make your work truly your own.
Plagiarism Checker
Paste your text below and check it against billions of web pages. You get an originality score, the passages that look copied, and links to the sources they match.
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Results are AI-generated estimates using live web search and should be used as guidance, not a definitive academic judgement.
How this plagiarism checker works
The checker breaks your text into passages and searches the live web for matching content. Every match lowers your originality score, which is the share of your writing that appears to be genuinely your own.
Originality % = (Words with no online match ÷ Total words) × 100
Original
Little to no matching content found online. Safe to submit.
Review needed
Some passages match existing sources. Rewrite or cite them.
High similarity
Large sections match online content. Significant rework required.
A high similarity score isn't always plagiarism — quotes and common phrases can match too. Use the flagged sources to decide what needs a citation and what needs rewriting.
What our free plagiarism checker does
Built for students, researchers and writers who need to be sure their work is original before they hand it in.
Live Web Search
Your text is checked against billions of live web pages — news, blogs, Wikipedia, journals and essay sites — not a stale offline database.
Originality Score
Get an instant percentage showing how much of your writing appears original, so you know at a glance whether it's ready to submit.
Matched Sources
Every flagged passage links to the exact web page it matches, so you can verify, cite or rewrite with full context.
AI-Writing Signal
Alongside plagiarism, you get an estimate of how likely the text reads as AI-generated — useful for keeping your voice authentic.
Private & Free
No sign-up, no storing your documents. Your text is analysed on the fly and never saved — check as many times as you like, free.
Any Assignment
Essays, research papers, blog posts, dissertations or a single tricky paragraph — paste any text and get results in seconds.
Flagged too much? Let our experts make it original.
Our academic writers can rewrite, cite and polish your assignment so it passes any plagiarism check with confidence.
Hire ExpertsHow to check plagiarism in 3 steps
No downloads and no account. From paste to report in under a minute.
- 1
Paste your text
- Copy the essay, paragraph or assignment you want to check.
- Paste it into the box above — 20 words or more works best.
- 2
Run the check
- Press “Check Plagiarism” and the AI searches the live web.
- It compares your passages against matching online content.
- 3
Review your report
- See your originality score, matched sources and flagged passages.
- Cite or rewrite the highlighted parts, then re-check.
Frequently Asked Questions
Is this plagiarism checker really free?
Yes. You can check your text as many times as you need without signing up or paying. It's a free tool from Assignments4u to help students and writers submit original work.
How does the checker find plagiarism?
It uses AI with live Google Search to compare passages of your text against content that already exists on the public web. When a passage closely matches an online source, it's flagged and linked so you can review it.
Do you store or share my text?
No. Your text is sent for analysis and the results are shown straight back to you — nothing is saved on our side and your document is not added to any database.
What is a good originality score?
As a rule of thumb, 80% or higher is considered original and safe to submit. Between 50% and 79% you should review and cite or rewrite the matched passages. Below 50% means large sections match existing sources and need significant rework.
Can it detect AI-generated writing?
Alongside the plagiarism report you get an estimated likelihood that the text reads as AI-generated. Treat it as a helpful signal rather than a definitive verdict.
Is the result 100% accurate?
No automated checker is perfect. Common phrases, quotes and correctly cited material can match online sources without being plagiarism. Use the report as guidance and apply your own judgement.