Free AI detector + plagiarism checker
Know what's AI.
Know what's copied.
Paste your text to see which sentences read as AI-written and which passages match online sources, with highlights, links and a report you can keep.
- Sentence-level highlights
- Sources with links
- No sign-up to try
- Text deleted after 30 days
The report
Evidence you can actually use
Not just a percentage. See the exact sentences behind every score and the sources behind every match.
The shift to remote learning exposed gaps that schools had ignored for years. Moreover, it plays a crucial role in fostering personalized learning experiences across the educational landscape. My younger sister, for example, did most of eighth grade on a cracked phone screen.
Distance education is defined as instruction delivered when teacher and student are separated by physical distance1, and technology bridges that gap. Educators must thoughtfully navigate the multifaceted hurdles that this new era presents.
AI writing
Mixed
Similarity
1 source
1Wikipedia: Distance education
22 words · Quoted? No · Cited? No
How it works
Three steps, under a minute
Paste or upload
Drop in an essay, article or report. Plain text works today; Word and PDF are coming next.
Two checks at once
Our AI model scores every sentence while the plagiarism engine searches the web and academic sources.
See the evidence
Highlighted sentences, linked sources and a report you can save, so you know exactly what to fix.
Features
Built for honest answers
Detectors disagree and none are perfect. We show our work so you can judge for yourself.
AI-generated vs AI-rewritten
We separate text an AI wrote from text that was run through a paraphraser or humanizer, the same split modern detectors use.
Web + academic sources
Matches against live web results, Wikipedia and open academic papers, each with a link and match percentage.
Citation-aware
Every match is tagged: quoted and cited, cited but not quoted, or neither. Properly cited quotes aren't treated like copying.
Integrity checks
Flags look-alike characters and invisible text, the tricks some tools use to fool detectors.
Sentence-level evidence
No mystery number. You see which sentences drove the score and how confident the model is.
Private by default
Your text isn't sold, shared or used to train models without opt-in. Stored scans can be deleted any time.
Who it's for
For anyone who writes, grades or publishes
Students
Check your draft before you submit, find sentences that read as AI, and fix missing citations.
Teachers
Get evidence, not just a percentage. Highlights and sources make conversations with students fair.
Writers & SEO teams
Make sure client content is original and doesn't read like generic AI copy.
Editors & publishers
Screen submissions for copied passages and undisclosed AI use in one pass.
Pricing
Start free. Upgrade when you need more.
Paid plans launch soon. Free accounts keep their limits after launch.
Guest
$0no account
Try a quick check.
- 1,000 words per check
- AI detection + plagiarism
- Sentence highlights
Free
$0forever
For occasional checks.
- 2,500 words per check
- Saved report history
- Print / save report as PDF
- Google or email sign-in
Pro
$12.99per month
For heavy writers and teams.
- 15,000 words per check
- Word & PDF upload
- Downloadable PDF reports
- Academic source search
- Priority processing
Questions, answered
Is UseHumanize free?
Yes. You can check up to 1,000 words without an account, and up to 2,500 words per check with a free account. Paid plans add longer documents, saved reports and PDF exports.
How does the AI detector work?
A language model trained on human and AI writing scores overlapping windows of your text, then combines them into a probability for every sentence. The document score is the share of words in sentences flagged as AI. Scores need at least 300 words of prose to be reliable.
Can an AI detector be wrong?
Yes. Every AI detector, including ours, produces false positives, and they are more common with short texts and with writers whose first language isn't English. Treat a score as a signal to review, never as proof on its own.
What does the plagiarism checker compare my text against?
Live web search results, Wikipedia and open-access academic sources. Each match shows the source, the matched words and whether the passage was quoted or cited.
Do you store or train on my text?
Guest checks aren't stored. Signed-in users' reports are saved so you can revisit them, and you can delete them at any time. We never sell your text or use it to train models without your explicit opt-in.
Is this affiliated with Turnitin or GPTZero?
No. UseHumanize is an independent tool. Results from other detectors can differ from ours.
Check your next draft in seconds.
Free to try, no account needed. Sign up to save your reports and check longer documents.