PlagiarismCheck

Open Site
Free
★★★★☆ 4.2
Introduction: PlagiarismCheck is a tool that analyzes text for copied content and AI-generated traces to help ensure originality.
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PlagiarismCheck

You write something. You want to publish. You need to be confident it’s original. That’s where PlagiarismCheck comes in. It scans your text against billions of sources.

It also flags AI generated parts. You don’t want to be nailed for plagiarism or flagged for copying. This tool acts as your safety net.

What PlagiarismCheck does

It runs a similarity scan and gives you a similarity score. It highlights matching text and shows where source came from. It checks for AI content parts that look machine-written.

You can upload files (doc, pdf, etc). It supports integration via API or plugin. You can exclude certain URLs or domains.

It has memory: previous checks are stored (depending on your plan). It respects privacy your AI content isn’t added to public databases (if the tool has that promise).

How the tool works

You paste your text or upload a file. It runs a deep search across web pages, journals, archives, etc.
It calculates a matching percentage.

Then you review highlighted areas, see sources, adjust your text. You repeat until your content is clean.

Pricing, usage & what you pay

PlagiarismCheck usually has a freemium or trial base. Beyond that, you pay per words or via subscription.

For example, many tools charge ~$8–$17 monthly for moderate use (e.g. up to 100,000 words). Some let you pay per check or package of submissions (single checks).

Higher plans unlock API, batch checks, priority support, team accounts.

Pros

  • Helps avoid accidental plagiarism
  • Flags AI-written parts for you to adjust
  • Works with files, links, text
  • API / integrations make it flexible
  • Exclusion and privacy controls

Cons

  • Deep scans may take time on longer text
  • Matching text still needs you to interpret or edit
  • Heavy users might pay more
  • AI detection sometimes false positive
  • Doesn’t guarantee zero risk only aid

Tips to use it well

Run early before final edit. Use exclusion (for your domain or trusted sources). Edit highlighted parts, recheck. Break large docs into smaller chunks.

Use API or plugin to integrate with your workflow. Check both for plagiarism and AI content you want both clean.