Free tool

Content Comparator

Compare two texts, a URL and a text, two URLs, or scan a whole website to detect duplicate or near-duplicate content (lexical similarity, TF-IDF, structure, identical sentences). No sign-up required.

Compares two specific pages, not an entire website. To compare two whole sites page by page, use the "Site vs Site" tab.

The URL points to a single page, not the whole website.

Scans a single website and compares its pages with each other to detect internal duplication.

Scans two whole websites and compares every page of site A with every page of site B (useful to detect duplicate content across two domains). 20 to 30 pages per site give a fast result.

What is Content Comparator for?

Content Comparator measures how closely two pieces of content match. It compares two texts, a text and a URL, two URLs, or scans a whole website to find pages that duplicate one another or across two domains. Instead of a plain percentage of shared words, it combines several measures to tell truly duplicated content apart from merely similar content.

Five comparison modes

Text vs text, text vs URL, URL vs URL, single-site scan, and Site vs Site page by page.

Multi-signal score

Lexical similarity, TF-IDF, structure and identical sentences are combined into one readable score.

Sentence-level detail

Identical paragraphs and sentences are highlighted so you can see exactly where the overlap comes from.

At-risk page groups

On a site scan, pages that are too close are grouped so you can prioritise your SEO fixes.

How it works

  1. Pick a comparison mode based on what you want to confront.
  2. Paste your texts or enter the URLs, then run the analysis.
  3. Read the overall score, then drill down to identical paragraphs and sentences.

Frequently asked questions

How is the similarity score calculated?

The tool combines lexical similarity, TF-IDF weighting, structural proximity and identical-sentence detection, for a score more reliable than a plain percentage of shared words.

Can I compare two whole websites?

Yes. The Site vs Site mode crawls the pages of both domains and compares each page of one with each page of the other.

What counts as near-duplicate content?

Paraphrased or slightly edited content: the tool detects it at paragraph and sentence level, where an exact comparison would see nothing.