Is CopyCheck Online really free?

Yes. The Free Check uses local corpus + UAPI web search, no login needed. 3 free searches per day for guests, 10 per day when logged in.

How does the Web Check differ from Free Check?

Web Check (paid, Tavily-powered) crawls full web pages and provides deeper source matching. The Free Check is fast and great for most cases.

Can AI rewrite my plagiarized parts?

Yes. Click "AI Rewrite" after a check for line-by-line fixes plus a fully rewritten version (powered by DeepSeek).

Is my text stored anywhere?

No. Only check summaries and source matches are saved for your history. Raw text is never uploaded, trained on, or shared with third parties.

Which languages are supported?

Mixed Chinese/English text detection. UI in English and Chinese, switchable on the fly.

How accurate is the check?

Free Check uses shingle fingerprinting plus live web search. Web Check goes further with full-page extraction.

CCCopyCheck Online

Writing Tools ← Back to home

Free Essay Checker

One pass over your essay for duplicated passages, grammar slip-ups, and rewrite ideas — before anyone else reads it.

EssaysAssignmentsPersonal statements

Last updated: 2026-08-11 · Privacy

What an essay checker covers

An essay checker combines an originality scan with writing-quality feedback. CopyCheck Online runs the originality scan locally (similarity %, flagged matches, source URLs) and, with the AI tools, adds grammar checking and rewrite suggestions.

Because the core scan runs in your browser, your essay draft stays private — no upload, no risk of your work landing in a public corpus.

By the numbers

1Essays up to 10,000 characters supported.
2Local check: instant, offline, 100% private.
3AI rewrite keeps your argument while removing overlap.
4Free tier: 20 local + 3 web checks per month.
5History (7 days) for logged-in users to track revisions.

Essay checker vs manual proofreading

	CopyCheck Essay Checker	Manual review
Originality scan	Automatic	Hard to do manually
Grammar & style	AI-assisted (tools)	Your own eye
Speed	Seconds	30+ minutes
Source URLs	Shown	N/A

Check your essay in 3 steps

1
Paste your essay
Paste up to 10,000 chars or upload TXT/MD/PDF.
2
Run Free Check
Instant similarity score with highlighted matches.
3
Fix & polish
Use AI Rewrite for overlaps, Grammar Checker for clarity.

Example

Input

"In conclusion, the results demonstrate that the proposed methodology effectively addresses the research objectives outlined in section one."

Output

Similarity 12% (clean) · Grammar: 2 suggestions · "effectively addresses the research objectives" → consider "meets the goals" · Run-on sentence → split into two.

FAQ

Is the essay checker really free?

Yes. Free tier gives 20 local + 3 web checks per month with no login.

Will my essay be added to a database?

No. Local checks never leave your browser; web checks send only a short query.

Can I check references/citations?

Use the Citation Generator to format sources after you fix the essay.

Sources

· Free-tier policy and engine details (lib/engine.ts, app/api/uapi/search/route.ts)

More free tools

Plagiarism CheckerCore checker Grammar CheckerStyle & grammar fixes Citation GeneratorAPA / MLA / Chicago