Reading Time Calculator
Turn a word count into how long the text takes to read or say.
Common Text Finder
Find the lines, words or phrases two texts have in common.
Longest shared passage
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| Shared item | In first | In second |
|---|
Quick Tool Overview
The Common Text Finder reports the intersection of two texts at line, word or phrase level — including the longest shared passage, which is the single strongest signal that two documents come from the same source. Counts from both sides are shown for every shared item.
- What it does
- Finds what two texts have in common
- You give it
- Two lists, documents or keyword sets
- You get back
- Shared items with per-text counts and the longest shared passage
- Best for
- Competitor keyword overlap and source checking
About the Common Text Finder
The intersection is often more interesting than the difference. Which keywords do two competitors both target? Which customers appear on both lists? Which phrases do these two documents share, and is the longest one long enough to be suspicious?
This finds what two texts have in common at whichever level you need. Line level for comparing lists, word level for comparing vocabulary, and phrase level for finding shared passages — including the longest common passage, which is the figure that tells you whether two documents share a source. Results come with counts from each side, so you can see whether a shared word appears once in one text and forty times in the other.
Key features of the Common Text Finder
Three comparison levels
Lines for lists, words for vocabulary, phrases for shared passages — one tool for three questions.
Longest common passage
Two independently written texts rarely share six consecutive words, so this figure carries real weight.
Counts from each side
A word central to one document and incidental to the other is visible as such, not just "shared".
Filler words excluded
Otherwise every English text shares "the" and "and", and the result is mostly noise.
Copy any list
The shared items, and each text's unique items, can be copied separately.
How to use the Common Text Finder
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1
Paste both texts
Two lists, two documents or two sets of keywords.
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2
Choose the level
Lines for lists, words for vocabulary, phrases for shared passages.
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3
Set the matching rules
Ignore case and punctuation, and exclude common filler words from a word-level comparison.
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4
Read the shared items
Each common item is listed with how often it appears in each text, plus the longest shared passage.
Frequently asked questions
Because every English text shares "the", "and" and "of", so a word-level intersection without filtering is mostly noise. Excluding stop words leaves the shared vocabulary that actually says something.
It is the strongest single signal that two documents share a source. Two independently written texts rarely share more than five or six consecutive words; a twenty-word match almost always means copying.
Two at a time. To find what three share, compare the first two, paste the result into one box and compare it with the third.
Because a shared word can be central to one document and incidental to the other. Both counts are shown for exactly that reason — the ratio between them is usually the interesting part.
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