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Duplicate content check

Do4U reads your website and compares the pages with each other. You enter the address of your start page, or a list of addresses, or the address of a sitemap. Do4U reads a limited number of pages of the same website and checks titles, meta descriptions, H1 headings, canonical links, noindex and the visible text. You get every problem grouped with the affected addresses: duplicate and missing titles and descriptions, titles that differ only in the brand, very short and very long titles (as guidance, not as a Google rule), pages with little text, pages with nearly the same text, canonical links that point to a broken page or another website, and noindex pages that your own pages link to. You can export everything as CSV. No AI is used, and the check is free.

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Who it is for

For website owners, SEO freelancers and agencies who want to find duplicate titles, descriptions and pages before search engines pick the wrong one, for example after a relaunch, a shop import or a move to a new system.

Typical uses

  • Find duplicate and missing titles and meta descriptions on a whole website
  • Find pages with nearly the same text and decide which one stays
  • Check canonical links after a relaunch or a move
  • Find noindex pages that your own navigation still links to
  • Check the addresses of a sitemap before you submit it

Example

Input

https://example.com/ (or a list of addresses, one per line, or https://example.com/sitemap.xml)

Result

Duplicate titles: "Example Shop" on / and /contact. Missing or empty meta description: /contact. Very long titles: /blog/first-post – 71 characters (guidance: 20 to 60). Little visible text: /contact – 39 words. Near-duplicate page text: /blog/first-post and /blog/first-post-copy – 2 pages · 92 % similar. Canonical points to a page that does not work: /blog/first-post-copy – Canonical: https://example.com/blog/old-post answers with HTTP status 404.

A fixed example, shortened. Real results are AI-generated: please check them.

Price and limits

Price
free, without sign-up
Available with
Free, With package
Input limit
One page with up to 60,000 characters of HTML

Privacy

Processed on our own servers in the EU (Poland). Inputs and results are deleted after 7 days (Free) or 30 days (packages), or right after you see the result if you choose not to store them. Images are deleted right after processing.

In the API

Tool name: duplicate_content_check. Create a job with POST /api/v1/jobs and fetch the result with GET /api/v1/jobs/{id}. You find your API key in your account.

curl -X POST https://do4u.eu/api/v1/jobs \
  -H "Authorization: Bearer d4u_…" -H "Content-Type: application/json" \
  -d '{"tool": "duplicate_content_check", "url": "https://example.com/"}'

Full API documentation →

Questions and answers

Does the duplicate content check use AI?

No. Do4U reads the pages and the code compares titles, descriptions, headings, canonical links and the visible text. The check is free; there is a daily limit of checks per account.

Are the title and description lengths Google rules?

No. Google sets no fixed limit and shortens titles and snippets to fit the screen. Do4U shows very short and very long texts as guidance, so you can check them.

How does Do4U find near-duplicate pages?

Do4U compares sequences of five words in the visible main text of each page, without navigation, header and footer. If two pages share more than the set share of these sequences, they appear as a group. Pages marked noindex do not count.

Is my text stored?

Only as long as needed: 7 days on Free, 30 days with a package – or not at all if you choose not to store it. Processing happens on our own servers in the EU (Poland).

Can I use the result right away?

Results are AI-generated. Please read them before you publish or send them.

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