WriteCheck: Check Your Paper for Plagiarism — Free & Instant
Paste your text and get an instant similarity score — no signup needed. Want to see exactly which sources matched? Get the full report starting at $2.
Powered by advanced AI similarity detection
How to Use WriteCheck — Three Simple Steps
WriteCheck is designed to be instant. No setup, no account, no learning curve — paste your text and get your result.
Paste Your Text
Copy and paste your essay, research paper, or any written work into the box above. No file upload required — plain text only.
Run the Plagiarism Check
Click “Check for Plagiarism” and the tool scans your text against 99 billion web pages and academic databases instantly.
Get Your Similarity Score
Your similarity percentage appears in seconds. High score? Get the full report to see exactly which sources were matched.
Free Similarity Score — Full Report Available
Paste your text and get your similarity score instantly — no account required. Need to see which sources matched? Unlock the full plagiarism report starting at $2.
Free Similarity Score — No Signup
Paste your text and get your similarity percentage instantly. No account, no credit card, no institutional access required. The score is always free.
Accurate Similarity Detection
WriteCheck scans against billions of web pages and academic sources. The similarity score accurately reflects how much of your text matches existing published content.
Check Before You Submit
Catch accidental plagiarism before your professor does. Use WriteCheck on every draft — not just the final version — to fix issues while you still have time.
Full Report from $2/week
High similarity score? Get the full plagiarism report to see exactly which sources matched — and where. Plans start at $2/week with 7-day access.
WriteCheck vs. Grammarly vs. Paid Plagiarism Checkers
| Feature | WriteCheck.pro | Grammarly | Paid Checkers |
|---|---|---|---|
| Free similarity score | ✓ Always free | ✗ Paid plan | ✗ Subscription only |
| No account required | ✓ Yes | ✗ Required | ✗ Required |
| Similarity score (%) | ✓ Yes | ✓ Yes | ✓ Yes |
| Full source report | ⚠ From $2/week | ⚠ Paid plan only | ⚠ Subscription |
| Instant results | ✓ Yes | ✓ Yes | ⚠ Varies |
| Text never stored | ✓ Yes | ⚠ Check policy | ✗ Often added to database |
What Does WriteCheck Detect?
WriteCheck scans for multiple types of similarity — including ones students don’t always realize are a problem.
Direct Plagiarism
Copying text word-for-word from a source without quotation marks or citation. The most obvious form — and the easiest for any similarity checker to catch. Even a single copied paragraph will flag your paper.
Mosaic Plagiarism
Mixing phrases from multiple sources into your own text without proper attribution. Also called “patchwork plagiarism” — it looks original on the surface but matches too closely to existing content. Often unintentional.
Paraphrasing Plagiarism
Rewriting someone else’s ideas in slightly different words without citing the source. Even if no sentence is copied exactly, the structure and ideas are borrowed — and WriteCheck flags this too.
Self-Plagiarism
Submitting your own previously published or submitted work as new. If your earlier paper is publicly available online, WriteCheck will detect the overlap. Always check your institution’s policy on reusing your own work.
Note on AI-generated text: AI-written content can overlap with existing web content in ways you wouldn’t expect. If you’ve used AI writing tools in your draft, run a WriteCheck plagiarism scan before submission.
Is WriteCheck Accurate? What Your Score Means
WriteCheck.pro compares your text against billions of web pages and academic publications. The similarity score shows what percentage of your writing matches content already published online. Here’s how to read it.
| Similarity Score | What It Means | What to Do |
|---|---|---|
| 0–15% | Generally acceptable. Matched content is likely properly cited quotes or common phrases. | Confirm citations are in order. Usually safe to submit. |
| 15–30% | Moderate similarity. Some sections may need paraphrasing or better citation. | Get the full report to see which parts are flagged. Rewrite or add citations where needed. |
| 30–50% | High similarity. Significant portions of your text closely match existing content. | Major revision needed. Paraphrase flagged sections, add citations, and re-check. |
| 50%+ | Very high similarity. The paper may not pass academic integrity checks. | Do not submit. Rewrite substantially, then run another scan to confirm improvement. |
Important: Every university sets its own threshold. Always check your institution’s academic integrity policy alongside your WriteCheck similarity score.
How to Lower Your Similarity Score
If your score comes back higher than expected, here’s what works:
- Paraphrase flagged sections in your own words — rewrite the entire sentence structure, not just swap synonyms
- Add proper in-text citations for any idea you borrowed, even if you paraphrased it
- Use quotation marks for any text you copy exactly, and cite the source
- Remove accidental copy-pastes — drafting notes often make it into final papers unintentionally
- Run WriteCheck again after revisions to confirm your score improved before submitting
About This Tool — Free Plagiarism Checker for Students
WriteCheck.pro is a plagiarism and similarity checker built for students who want to review their work before submission. Paste any text — an essay, research paper, or assignment — and get an instant similarity score. No account, no signup required.
The similarity score is always free. If your score comes back high and you need to see exactly which sources were matched, you can unlock the full plagiarism report — plans start at $2/week with 7-day access, no long-term commitment required.
Pro tip: Run a plagiarism check on every draft, not just your final version. Catching a high similarity score early gives you time to rewrite and add citations — not the night before submission.
WriteCheck vs. Grammarly — What’s the Difference?
Grammarly is primarily a grammar and writing assistant — it offers plagiarism checking as a premium paid feature. WriteCheck.pro focuses entirely on plagiarism and similarity detection, and is completely free with no account required. If you need to check your paper before submission without paying or signing up, it’s the faster option.
Does This Tool Save or Store Your Paper?
No. WriteCheck.pro does not store, log, or share the text you submit. Your paper is analyzed and the result is returned to you — nothing is saved. Unlike some institutional tools that permanently add every scanned document to their database, WriteCheck discards your text immediately after the check. Your work remains entirely yours.
Plagiarism Checking and AI-Generated Text
If you’ve used AI writing tools to draft or expand any part of your paper, run a plagiarism check before submission. AI-generated text often draws on the same publicly available sources that populate plagiarism databases — and can overlap with existing articles or academic papers in ways that trigger a high similarity score. The similarity checker catches this overlap the same way it catches any other match.
WriteCheck — Frequently Asked Questions
Is WriteCheck free to use?
Is WriteCheck discontinued?
Is WriteCheck accurate?
Is WriteCheck legit? Does WriteCheck work?
Is WriteCheck reliable?
How does WriteCheck calculate the similarity score?
What does the similarity score mean?
Can I check my paper multiple times?
What is a good plagiarism score?
Does WriteCheck save my paper?
Can WriteCheck detect AI-generated text?
What types of plagiarism does WriteCheck detect?
WriteCheck vs. Grammarly — which is better for plagiarism checking?
Is WriteCheck the same as institutional plagiarism checkers used by universities?
Check Your Paper for Plagiarism — Free
Get your similarity score in seconds with no account required. Need the full source report? Plans start at just $2/week.