Plagiarism Checker

Ensure academic integrity by checking your work for plagiarism. Identify unoriginal content and get suggestions for proper citations.

Overview

The Plagiarism Checker helps you:

Check for plagiarism - Find unoriginal or copied content
Verify citations - Ensure proper attribution
Improve originality - Rewrite flagged sections
Learn proper citation - Understand how to cite correctly
Maintain integrity - Submit confident, original work

How It Works

The checker analyzes your text by:

Comparing to sources - Searches academic databases and web
Detecting similarities - Finds matching or similar passages
Evaluating paraphrasing - Identifies inadequately cited paraphrasing
Checking citations - Verifies proper attribution
Scoring originality - Provides overall originality percentage

Getting Started

Check a Single Document

Click "Plagiarism Checker" tab
Paste or upload your text
Click "Check Plagiarism"
Wait for comparison (1-5 minutes)
Review detailed similarity report

Upload a Paper

Click "Upload File"
Select PDF, Word, or text file
System processes document
Searches for plagiarism
Results display with highlights

Paste Your Text

Click "Paste Text"
Copy-paste your content
Click "Check Plagiarism"
Analysis runs in background
Get results and citations

Understanding Results

Similarity Score

0-10% Similarity

Likely original work
Well-cited and properly attributed
Minor coincidental matches

10-25% Similarity

Generally acceptable
Check highlighted sections
Ensure proper citations

25-50% Similarity

Needs review
Multiple matched passages
Revise and cite properly

50-100% Similarity

Highly concerning
Significant unoriginal content
Substantial rewriting needed

Detailed Report

For each matched passage:

Matched Content

Your text (highlighted in red)
Similar text from source
Side-by-side comparison

Source Information

Where the match was found
Publication details
DOI or URL link

Match Type

Exact match - Word-for-word
Paraphrasing - Reworded but same ideas
Citation needed - Should be cited
Self-plagiarism - Previously published by you

Similarity Percentage

How closely passages match
95%+ = near-identical
Lower percentages = distant matches

Common Plagiarism Issues

Issue 1: Unattributed Paraphrasing

Problem: "Research shows that machine learning improves accuracy." [Without citation]

Solution: "According to Smith (2023), research shows that machine learning improves accuracy."

Issue 2: Incomplete Citations

Problem: "As the study found..." [Missing details]

Solution: "As noted in Johnson et al. (2022), the study found..."

Issue 3: Large Block Quotes Without Attribution

Problem: Large paragraph directly from source without quotation marks

Solution: "According to the authors, [exact quote]" or paraphrase + citation

Issue 4: Self-Plagiarism

Problem: Reusing your own previous work without citing it

Solution: Cite your own work or rewrite substantially differently

Issue 5: Common Knowledge

Problem: Basic facts don't need citations:

"Paris is in France" ✓ No citation needed
"The Earth orbits the sun" ✓ No citation needed
"COVID-19 is a viral disease" ✓ No citation needed

Issue 6: Improperly Paraphrased Material

Problem: Just changing a few words without citation:

Original: "Machine learning algorithms process data"
Bad paraphrase: "Machine learning models process information"

Solution:

Fully rewrite and cite, OR
Use direct quote with citation

How to Fix Plagiarism

Step 1: Identify Issues

Review all highlighted sections
Read the source material
Understand what needs fixing
Determine if citation or rewriting is needed

Step 2: Revise Content

For exact matches:

Use quotation marks
Add proper citation
Add in-text reference

For paraphrasing:

Rewrite more substantially
Change sentence structure
Use different vocabulary
Still cite the source

For inadequate citations:

Add missing citations
Use proper format (APA, Chicago, etc.)
Include author, year, details

Step 3: Recheck

Make revisions
Run plagiarism check again
Verify all issues resolved
Ensure citations are proper

Citation Suggestions

The checker suggests proper citations:

For flagged content:

See suggested citation format
Choose your style (APA, Chicago, etc.)
Copy suggested citation
Add to your document

Example Suggestion:

Original Source: "The role of AI in healthcare is expanding rapidly."

Suggested APA Citation: Smith, J., & Jones, B. (2023). The role of artificial intelligence in healthcare. Journal of Medical Innovation, 15(3), 100-110.

Using Results Responsibly

✅ DO:

Review all flagged sections carefully
Properly cite sources
Paraphrase and cite well
Disclose AI-assisted writing (if used)
Check your institution's policy

❌ DON'T:

Ignore plagiarism warnings
Hope professor won't notice
Add fake citations
Delete flagged content without fixing
Try to trick the system

Understanding False Positives

Sometimes the checker flags content that's not plagiarism:

Why it happens:

Common phrases (multiple sources use them)
Technical terminology (repeated in field)
Well-known quotes (many cite the same)
Your own writing (self-plagiarism check)

What to do:

Review the match
If legitimate, mark as "common knowledge"
Or add citation for clarity
Continue checking rest of document

Policy & Academic Integrity

Understanding Your Institution's Policy

Each school has different rules:

Some allow AI use with disclosure
Some forbid all AI use
Some allow paraphrasing without citation
All forbid presenting others' work as your own

Check your:

Course syllabus
Student handbook
Plagiarism policy
Submission guidelines

What Counts as Plagiarism

Always plagiarism (never acceptable):

Copying without quotation marks
Submitting someone else's work
Paraphrasing without citation
Buying papers or using essay mills

Check your policy:

AI-generated content
Self-plagiarism (reusing your work)
Collaboration and shared writing
Quotation of common knowledge

Batch Processing

Check multiple papers at once:

Click "Batch Check"
Upload multiple files
System analyzes all in parallel
Get individual reports for each
Summary report with all results
Export for review

Exporting Reports

Save plagiarism reports:

Click "Export Report"
Choose format: PDF or detailed HTML
Report includes:
- Overall similarity score
- All flagged passages
- Source information
- Citation suggestions
- Analysis timestamp
Share with instructor if needed

Tips for Avoiding Plagiarism

Read & Understand First

Don't just copy source material
Understand concepts fully
Then write in your own words
Cite the original source

Take Effective Notes

Use your own words when taking notes
Mark quotes vs. paraphrases
Note source information immediately
Review before writing

Paraphrase Properly

Read source carefully
Close the source
Write in your own words
Still cite the source
Check your paraphrase vs. original

Keep Track of Sources

Save URLs and publications
Note page numbers for quotes
Maintain bibliography as you research
Use reference management tools

Write Incrementally

Start early (not last minute)
Take breaks between sections
Develop your voice throughout
Time to revise and improve

Common Questions

Q: Is it plagiarism if I use the same source as others? A: No. Multiple people cite the same source. Just cite it properly.

Q: Can I reuse my own words from previous work? A: Only with caution. Cite your own previous work if substantial.

Q: What about facts everyone knows? A: Common knowledge (Paris is capital of France) doesn't need citation.

Q: How similar is too similar? A: It depends on your institution, but <5-10% is generally safe.

Q: What if I paraphrase really well? A: Even well-paraphrased ideas must cite the original source.

Q: Can I quote without citing? A: No. Every quote must include proper citation.

Limitations

The checker:

May not find all sources (especially old papers)
Can't judge context (sometimes similarity is acceptable)
Focuses on text matching (not concepts)
Requires comparison to available sources
Should never be the only factor in evaluation

Always review results with human judgment.