Check-Plagiarism review
A broad plagiarism and writing toolkit with web scanning, AI detection, and API access.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Check-Plagiarism is a web-based plagiarism checker for students, teachers, researchers, writers, publishers, and educational organizations. It accepts pasted text and DOC, DOCX, TXT, and PDF uploads, then presents similarity percentages, matching sources, and highlighted duplicate content. Users can download PDF reports, check for AI-generated text, run multilingual checks, and exclude specific URLs. The product also includes rephrasing, summarization, and grammar tools, making it broader than a plagiarism-only service.
Access is offered through a free plan alongside Weekly, Monthly, Semi-Annual, and Annual plans. Each listed paid plan includes Deep Search, Plagiarism Checker, Rephraser, Summarizer, Grammar Checker, and Plagiarism APIs. The published product details show a starting price of 4.99, while the plan descriptions emphasize larger word quotas and higher per-search limits for paid access. The plagiarism API returns JSON responses, and the service supports PDF report export. A 7,000-word maximum document size and support for common file formats suit routine academic, editorial, and content checks, though larger submissions may require splitting.
Its access options are a practical fit for small teams: the product is available on the web, through an API, on Android, and as a Chrome extension. WordPress, CMS, CRM, and LMS integrations extend it into publishing, education, and content workflows. The main boundary is its web-only source coverage. Although academic and publication scanning is described, the checker searches open web sources rather than university libraries or colleges. Choose Check-Plagiarism when flexible access, multilingual checking, AI-text detection, and workflow integrations matter. Choose an alternative when institutional-library coverage or a narrower, dedicated plagiarism workflow is the priority.
Check-Plagiarism pros and cons
- Where it wins
- Free web checking with multilingual support and AI-text detection
- PDF reports, source matches, highlights, and common document uploads
- Web, API, Android, Chrome extension, and WordPress/CMS/LMS integrations
- Where it doesn't
- Source coverage is limited to web resources
- Document uploads are limited to 7,000 words
- Paid plans share the same listed feature set
Check-Plagiarism fact sheet, pricing and score →
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