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Duplicate Content Checker

Duplicate Content Checker compares two URLs or pasted texts with token and n-gram similarity. Review overlap, shared phrases, and uniqueness risk on ToolYour.

Waiting for bot check… this usually takes a second.

What next?

Keep going with Duplicate Content Checker

Finish this check in the browser, then pick the path that matches how you work — another related tool, REST for apps, or MCP for agents.

  1. 1. Related check

    After this result, run SEO audit for the next signal.

    SEO audit
  2. 2. Automate with API

    Same job from your server with X-Api-Key. Free tier includes 500 credits/month.

    Create free account
  3. 3. Hand off to an agent

    Connect Cursor or Claude to ToolYour MCP — plan → run → verify.

    MCP setup

What is Duplicate Content Checker?

Near-duplicate and thin-variant pages waste crawl budget and blur which URL should rank. You need a measurable overlap signal — not a vague “feels similar” judgment.

Duplicate Content Checker compares two public URLs (visible body text) or two pasted drafts using token Jaccard plus bigram/trigram overlap. It surfaces shared n-grams, tokens unique to each side, and severity-ranked guidance (exact match, near-duplicate, moderate overlap). No generative AI — deterministic NLP only.

Use it for rewrite drafts, locale/boilerplate variants, and same-site cannibalization checks. Pair with SEO Change Diff when you need meta/canonical field changes instead of body similarity.

What are common questions about Duplicate Content Checker?

Can I paste text instead of URLs?

Yes. Send textA and textB, or use the Text mode in the browser tool. Do not mix URL and text modes in one request.

How is similarity calculated?

A weighted mix of token Jaccard, bigram Jaccard, and trigram Jaccard. Exact normalized text match scores 100.

Is AI used?

No. Fetch/parse and n-gram heuristics only.

What does the report grade mean?

The grade favors uniqueness (100 − similarity). Higher uniqueness means lower duplicate risk.

Does this detect paraphrases?

No. It is lexical (tokens/n-grams), not semantic paraphrase detection.

What are the key features of Duplicate Content Checker?

N-gram overlap

Shared bigrams/trigrams highlight reused phrases.

Problems & fixes

Severity-ranked guidance with exact technical terms.

Uniqueness score

Report grade favors lower duplicate risk.

URL or text mode

Compare two pages or two pasted drafts.

How do you use Duplicate Content Checker?

Review similarity and shared n-grams

Spot near-duplicates and boilerplate overlap.

Choose URLs or paste text

Use public HTTPS pages or draft body copy.

Rewrite or canonicalize

Differentiate copy or consolidate with canonical/redirects.

Related tools

Use SEO Change Diff for field-level meta/heading/schema changes. Use Competitor Page Compare for scored feature gaps vs another domain.

Free · API · MCPToolYour platform

Use Duplicate Content Checker three ways

The free Duplicate Content Checker on this page works in your browser. The same workflow is available via REST API for apps and via the remote MCP server for Cursor, Claude, and other agents — one API key, one plan, one quota. This tool is part of the seo-apis module under Digital Tools.

  1. 1Create a free accountGet an API key for REST and MCP — 500 credits/month on the free tier.
  2. 2Connect or callPaste the MCP URL into Cursor/Claude, or call REST with X-Api-Key.
  3. 3Same key & creditsBrowser smoke-checks stay free; API-backed runs share one monthly credit quota.
Create free accountRemote MCP setupAPI referenceManage API keysPricing

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