- Technology
- No Comment
Best Free Plagiarism Detector Tools to Check Plagiarism

Originality is super important in both academic & professional fields. Plagiarism, the process of presenting someone else’s ideas in your work without giving him due credit, can damage your reputation.
Therefore, you need to avoid it at any cost.
An online plagiarism checker is the way to go. The tool helps you check the originality of your content so you can avoid the serious consequences of plagiarism.
But there are so many tools that claim to check plagiarism efficiently.
Do they deliver accurate results? What are the best tools out there on the internet? No worries! In today’s guide, we’ve picked some of the finest plagiarism checkers so you can ensure uniqueness in your work. We’ll discuss their key features, reasons to choose them, & pricing tags.
So, let’s get started!
1. SmallSEOTools
This free plagiarism checker by SmallSEOTools scans and detects duplicate content in a matter of moments. It supports different languages and file formats, making it most common among writers, students, and even professionals who want to ensure originality in their work. Its straightforward design makes it easy to use.
Key Features
-
Fast Scanning
This plagiarism detector provides plagiarism reports in the shortest time possible.
-
Highlight Matches
It highlights the plagiarized sections in red, so you can check the duplicated pieces.
-
Multiple File Uploading Options
The tool accepts different file types, including .doc, .pdf, & .txt.
-
One-Click Rewrite
If your content is flagged for plagiarism, this tool allows you to rewrite it with its built-in paraphrasing tool.
-
Report Downloading
You can download the plagiarism report without spending a single penny.
Why Choose SmallSEOTools Plagiarism Checker?
-
Easy to Use
Simple interface, no technical skills required.
-
Free to Use
Check multiple documents for free.
-
Universal Compatibility
Works well on computers, tablets, & even smartphones.
Pricing
Check up to 200 pages & 60,000 words for $11.84/month. And if you’re looking to scan up to 4800 pages, its pricing plan of $23.84/month has your back.
2. Duplichecker
Duplichecker is an online plagiarism checker that spots duplicated content. It helps writers, students, teachers, & bloggers check for plagiarism in their work. The tool compares content with millions of sources to find matches. It is free to use & offers accurate results.
Key Features
- Multiple File Formats
You can upload text in different formats like .doc, .pdf, .txt, & more. The tool also allows you to copy and paste the text.
- Results in Percentage
The tool shows how much content is unique & plagiarized in percentages. It also highlights sources with similar content.
- Multilingual Support
The tool works in 12+ languages, including Spanish, Russian, Arabic, & others. It is useful for checking non-English content too.
- Fast & Deep Scanning
This plagiarism checker scans content thoroughly & delivers quick results. You can also download detailed reports.
- Writing Enhancements
It includes a paraphrasing tool & grammar checker to improve content quality. This way, you can fix errors & remove plagiarism easily.
Why Choose Duplichecker?
-
Free to Use
DupliChecker offers free plagiarism checking for all users. It is accessible without payment.
-
Accurate Results
The tool provides detailed results with a high accuracy rate. It identifies even small instances of copied content.
-
User-Friendly Interface
The tool is easy to use. You can paste text or upload files in just a few steps.
Pricing
DupliChecker is free to use for basic plagiarism checks. It offers multiple pricing plans, ranging from $5/week to $2000/year based on your individual needs.
3. Grammarly
Grammarly’s plagiarism checker helps you check your content for plagiarism & other writing issues. It scans your text against billions of web pages to deliver results. You can paste your text or upload a file to get quick results.
Key Features
-
AI Plagiarism Detection
It uses artificial intelligence to detect copied text by comparing your content with billions of web pages.
-
File Upload Option
The tool allows you to upload files for easy plagiarism checks.
-
Originality Score
This plagiarism checker provides a score according to the uniqueness of your content.
-
Additional Writing Support
Offers tools like a paraphraser, essay checker, & citation generator for better writing.
Why Choose This Grammarly?
-
Quick Results
Check plagiarism instantly with just a single click.
-
Accuracy
The tool compares your work with billions of online sources for reliable results.
-
All-in-One Tool
It includes features for plagiarism detection, citations, & writing improvement.
Pricing
Grammarly’s plagiarism checker is available with Grammarly Pro. Pricing depends on the plan you choose, starting from a monthly subscription. The Pro plan costs $30/month.
4. Plagio
Plagium is an online tool for checking for plagiarism in text. It helps identify copied or reused content to ensure originality. The tool supports various file formats and offers extra features for regular users.
Key Features
-
Quick Search
You can quickly check plagiarism by pasting text into the search box. It’s free for occasional use.
-
File Comparison
Compare two or more documents to spot differences. The results are displayed visually.
-
Deep Search
This plagiarism detector scans your document thoroughly using databases. It includes advanced tools for better results and requires a paid account.
-
Google Docs Add-on
This feature allows users to detect plagiarism directly within Google Docs. It simplifies checking while working on documents.
-
File Uploading
Users can upload files in formats like Word, PDF, or plain text. The tool generates a report that highlights possible copied content.
Why Choose This Plagium?
-
Ease of Use
The tool is simple & user-friendly. Paste text or upload files to get results quickly.
-
Multiple Features
Plagium offers many tools, like quick searches, deep checks, & file comparisons, in one place.
-
Google Integration
Users can connect with Google Drive & Docs for a smooth workflow.
Pricing
Quick Search starts at $0.04 per page, while Deep Search costs $0.08 per page. File comparison is available for $0.005 per page.
5. QuillBot
The Plagiarism Checker by QuillBot helps you find & fix plagiarism in your work. It checks your text against a large database & gives detailed reports. It works in over 100 languages to make sure your writing is unique.
Key Features
-
Accurate Results
The plagiarism checker uses advanced technology to provide plagiarism scores & feedback.
-
Monthly Scans
Scan up to 25,000 words per month with a Premium subscription. You can buy more if needed.
-
Citations Feedback
It points out where citations are missing so you can create them quickly.
-
Access to Other Tools
A Premium subscription also unlocks QuillBot’s paraphraser, summarizer, & more.
-
File Uploads
You can upload files in formats like .txt, .pdf, .docx, & .html for easy checking.
Why Choose QuillBot?
-
Easy to Use
It’s simple & quick. Just upload your file & get results in seconds.
-
Professional Support
Perfect for business professionals, writers, students, & creators to maintain originality.
-
Multilingual Scanning
You can check texts in over 100 languages. It’s useful worldwide.
Pricing
The free version includes basic features. The premium version, on the other hand, offers 25,000 monthly words & unlimited paraphrasing. Pricing varies based on the chosen Premium plan.
Why Use a Plagiarism Checker?
Ensure Content Originality
An online plagiarism detector checks the originality of your content. It highlights the copied portions so you can make your writing unique & authentic.
Automated Checking Process
The entire process of checking plagiarism is simple & straightforward. Simply upload the document & the tool will do the rest of the work. It delivers results in a matter of moments.
Protect Your Reputation
Didn’t you know that plagiarism can harm your image as a writer? An online plagiarism checker helps you protect your reputation by spotting plagiarized sections.
Provide Proper Citations
Some tools even show where citations are missing. The end results? You can fix them to give the due credit to the original author.
Preventing Duplicate Content in SEO
Copied content can hurt your site’s ranking as well. The tool finds the duplication information written on your site’s content. You can paraphrase the text to ensure uniqueness.
Features of a Plagiarism Checker
Multiple Document Formats
Upload files in different formats like .docx, .pdf, .txt, or .html. This way, you can easily use the tool according to your convenience.
Reporting Option
The plagiarism checker provides detailed reports that show the exact percentage of copied content. Plus, some tools even provide a list of sources.
Multiple Languages
A good tool supports multiple languages, including English, Portuguese, Spanish, French, & a lot more. Therefore, it’s ideal for a global audience.
Cloud Compatibility
These tools work online. This means you can access them from anywhere & check your content anytime.
Percentage Gauges
The tools show plagiarism as a percentage. This way, you can see how much content needs changes.
Conclusion
Plagiarism can spoil your reputation & impact your academic or professional growth. Therefore, using an online tool to check plagiarism is necessary. We’ve explored the top five plagiarism checker tools available in the market. They are simple to use, support multiple file formats, & provide quick results. So, pick a tool that meets your needs & make sure your content is unique.