About the Content Similarity Checker
This content similarity checker compares two texts you paste using two methods. Word-shingle (Jaccard) similarity measures how many short word sequences the texts share, which is good for catching copied or lightly edited passages. Cosine similarity compares overall word usage, which can flag texts that cover the same ground in different order. Shared phrases are highlighted in both texts.
Use it to check location or product pages built from one template, compare a rewritten article with the original, or review content from a writer for heavy reuse. High similarity between pages on your own site can mean they compete with each other or add little unique value. It does not search the web for copies; it only compares the two texts you provide, in your browser.
How to use it
- Paste the first text in the left box.
- Paste the second text in the right box.
- Compare the shingle and cosine similarity scores.
- Review highlighted shared phrases and rewrite where pages need to be distinct.
Frequently asked questions
What similarity percentage counts as duplicate content?
There is no official threshold. Very high shingle similarity usually means the texts are near-copies. Moderate scores are common for pages on the same topic or with shared boilerplate. Judge by whether each page offers something distinct to the reader, not by a single percentage.
Is this a plagiarism checker?
No. It compares only the two texts you paste and does not search the internet or a database. Use it when you already have two pieces of content to compare, such as two of your own pages or an original and a rewrite.
Why do shingle and cosine scores differ?
Shingle similarity looks at exact sequences of words, so rewording lowers it quickly. Cosine similarity looks at which words are used and how often, regardless of order, so two texts on the same topic can score high even if worded differently.