Free Plagiarism Checker
Paste in an essay, article, or blog post and see which passages overlap with existing published content, before someone else finds it first.
Result
Free from the team behind Typeahead. The autocomplete for your whole Mac.
Get TypeaheadWhat is a plagiarism checker?
A plagiarism checker is a tool that compares your writing against publicly available sources to find passages that match or closely paraphrase existing content. It returns an originality score and links to the matched sources, so you can see exactly what to revise before you submit coursework, publish an article, or deliver client work under your name.
Why It Matters
Unoriginal content has real consequences.
It's also more common than most people think. According to research from the International Center for Academic Integrity, more than 60% of university students admit to cheating in some form, including plagiarism, at some point in their studies. A quick scan before you submit catches overlapping passages while they're still easy to fix.
Source: International Center for Academic Integrity, Facts & Statistics
Where it matters
Coursework and research papers, freelance and agency deliverables, blog posts and articles going live, anything you're putting your name on.
Scans your text against publicly available sources and surfaces overlapping passages with links back to the original, whether they came from copy-pasting or from AI-generated text that happens to echo something already published, so you know exactly what to revise.
How It Works
Three steps, no learning curve.
Paste your text
Drop in an essay, article, or blog post you want to check before it goes out.
We scan for matches
Your text is compared against publicly available sources for overlapping passages.
See what's flagged
Get a percentage score and the matched sources for anything that overlaps.
A Different Way In
The fastest way to stay original is to write it yourself.
Plagiarism usually creeps in when you're leaning on someone else's words to save time. Typeahead saves that time a different way: completing your own sentences instead of handing you someone else's.
Typeahead completes your sentences, not your thoughts. It suggests the next few words as you type, in your own apps, in your own rhythm. You stay the author.
Plagiarism Checker
Common questions.
Yes. It's built as a free tool, no sign-up and no subscription, the same way we build everything else at Typeahead.
We're building it now. This page describes what's coming. Join the Typeahead waitlist or check back for updates.
Passages copied word-for-word from another source without attribution, and close paraphrases that lean too heavily on someone else's original phrasing.
Yes, that's the goal: comparing your text against publicly available sources to flag overlapping passages.
We're designing this the same way we designed Typeahead: your text is used to generate your result, not sold, shared, or used to build a profile of you.
Not automatically, but it can overlap with it. AI models are trained on existing text and can reproduce common phrasing, so AI-assisted writing sometimes matches published sources without you realizing it. That's a different problem from copy-pasting, but it shows up the same way in a scan.
By comparing your text against publicly available sources and flagging passages that overlap word-for-word or closely paraphrase existing content, the same way most plagiarism checkers work.
More Free Tools
The rest of the toolbox.
Want AI help while you write, not just after?
Typeahead completes your sentences in your own voice, right where you're already typing.
Mac only. One-time purchase. Runs offline.