This tool estimates how similar two pieces of text are by comparing their unique word sets using the Jaccard similarity coefficient — the proportion of shared words relative to the total combined vocabulary of both texts.
It's a straightforward way to spot rough duplication between two drafts, check how much two summaries overlap, or get a quick sense of whether two documents are covering substantially the same content.
This is a word-overlap measure, not a true plagiarism detection system — it won't catch paraphrased content that uses different words for the same ideas, and a real plagiarism check would need to search across a large database of existing published text, which this tool doesn't do.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
A tool that does one job well, without a cluttered interface or unrelated features competing for attention, tends to be faster to use than a heavier all-in-one app.
If you find yourself needing this conversion or calculation often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
Because there's no sign-up or installation step, you can jump straight from search result to working tool in a couple of seconds.
Unlike a heavier desktop application, there's nothing to download, update, or configure before you can start using this tool.
Because the calculation or conversion happens instantly as you type, you can experiment freely and see how changing one value affects the result.
The interface is intentionally simple, so there's no learning curve — the input goes in, the result comes out, and that's the whole interaction.
Frequently asked questions
Is this a real plagiarism detector?
No, it only measures word overlap between the two texts you provide directly — it doesn't search the internet or any external database for matches.
What counts as high similarity?
There's no universal cutoff, but a high percentage (70%+) suggests substantial shared vocabulary, while below 20% suggests largely distinct content — context always matters more than the raw number.