Students need reliable plagiarism checkers to ensure their essays, research papers, and assignments are 100% original before submission. Here are the best free plagiarism detection tools in 2025:
🥇 Top 7 Free Plagiarism Checkers for Students
1. Grammarly (Free Version)
🔗 https://www.grammarly.com
✅ Checks for plagiarism (limited in free version)
✅ Grammar & spell check
✅ Browser & Word plugin
Best For: Quick checks with grammar corrections.
2. QuillBot Plagiarism Checker (Free 1,200 words/month)
🔗 https://quillbot.com/plagiarism-checker
✅ Free 1,200 words per month
✅ Deep web & academic database scan
✅ AI detection included
Best For: Students needing occasional plagiarism scans.
3. DupliChecker (Fully Free)
🔗 https://www.duplichecker.com
✅ 100% free (no word limit)
✅ Deep search & side-by-side comparison
✅ No sign-up required
Best For: Unlimited free checks without registration.
4. SmallSEOTools Plagiarism Checker (Free)
🔗 https://smallseotools.com/plagiarism-checker
✅ Free with 1,000-word limit per scan
✅ Multiple file uploads (PDF, DOCX, TXT)
✅ Percentage-based similarity report
Best For: Detailed plagiarism reports.
5. Plagscan (Free Trial)
🔗 https://www.plagscan.com
✅ Free trial available
✅ Compares against academic databases
✅ Detailed plagiarism report
Best For: University-level research papers.
6. PaperRater (Free Basic Check)
🔗 https://www.paperrater.com
✅ Free grammar + plagiarism check
✅ No registration needed
✅ AI writing detection
Best For: Quick scans before submission.
7. PlagiarismDetector.net (Free)
🔗 https://plagiarismdetector.net
✅ 100% free (no word limit)
✅ Deep web search
✅ Supports multiple languages
Best For: Non-English content checks.
Comparison Table (2025)
| Tool | Free Limit | AI Detection | Best Feature |
|---|---|---|---|
| Grammarly | Limited checks | ❌ No | Grammar + plagiarism |
| QuillBot | 1,200 words/month | ✅ Yes | AI + plagiarism scan |
| DupliChecker | Unlimited | ❌ No | No sign-up needed |
| SmallSEOTools | 1,000 words/scan | ❌ No | File uploads |
| Plagscan | Free trial | ✅ Yes | Academic database checks |
| PaperRater | Free basic scan | ✅ Yes | Grammar + plagiarism |
| PlagiarismDetector | Unlimited | ❌ No | Multi-language support |
How to Avoid Plagiarism as a Student?
✔ Paraphrase properly (use tools like QuillBot)
✔ Cite sources correctly (APA, MLA, Chicago)
✔ Use plagiarism checkers before submission
✔ Avoid copy-pasting (even unintentionally)
Final Verdict: Best Free Plagiarism Checker?
- For unlimited free checks → DupliChecker
- For AI + plagiarism scan → QuillBot
- For academic papers → Plagscan
- For quick grammar + plagiarism check → Grammarly
Which tool do you use? Share your experience below! 📚✨