Free AI Detector + Humanizer

The AI detector that explains itself

Every other tool gives you a score. DetectAI tells you exactly why each sentence was flagged — and precisely what to change to fix it.

Detect AI Content → See how it works →
No signup needed
PDF & DOCX upload (Pro)
From $9/month
🤖 AI Generated — 91% score
In today's rapidly evolving landscape, it is imperative to leverage synergistic approaches to maximize sustainable outcomes.
💡 Why it was flagged
3 signals: "leverage", "synergistic", "imperative" are AI buzzwords. Uniform sentence length. No personal voice.
↓ Humanized in 4 seconds
✅ Human Sounding — 6% score
The way things are changing right now, the smartest move isn't working harder — it's finding approaches that actually hold up over time.
6%
AI Score After HumanizingPasses GPTZero, ZeroGPT & Turnitin
18M+
Monthly Searches
94%
Detection Accuracy
<5s
Avg Scan Time
6+
AI Models Detected
Free Tool

Detect, Understand & Fix AI Text

Paste text or upload a file. Get your AI score, a plain-English explanation of exactly why it was flagged, then fix it in one click.

1
Input
Paste or upload
2
Understand
Score + explanation
3
Humanize
Fix with one click
Your Text
📄
Drop your file here or click to browse
Supports PDF, DOCX and TXT files — up to 10MB
PDFDOCXTXT
🔒 File upload requires Pro plan — $19/month
✓
Words: 0 / 500 free
0%
AI Score
Analysing...
💡
Why was this flagged?
DetectAI explains exactly what triggered the AI signals
Sentence Analysis
AI
Mixed
Human
✦ Humanize this text
Rewrite to sound natural and bypass AI detectors
Click "Humanize Now" to transform your text into natural human writing that bypasses AI detectors...
↺ Re-run detection after humanizing to verify your new score
3 Simple Steps

Detect. Review. Fix.

The complete AI content workflow in one tool — in under 30 seconds, no account needed.

01
📋
Paste or upload your text
Paste up to 500 words free, or upload a PDF, DOCX or TXT file with a Pro plan. Works with output from any AI tool.
02
🔬
See your AI score instantly
Get a 0–100% AI probability score with sentence-level colour coding showing exactly which parts are AI-written.
03
✨
Humanize and verify
One click rewrites flagged content as natural human writing. Re-scan immediately to confirm your new score is safe.
Who Uses DetectAI

Built for every use case

From classrooms to content teams, AI detection is now a daily necessity worldwide.

🎓
Students
Check assignments before submitting. Humanize AI-assisted drafts to pass Turnitin and GPTZero every time.
👩‍🏫
Educators
Upload student papers and verify submissions with sentence-level AI highlighting before grading.
✍️
Bloggers & Writers
Avoid Google SEO penalties. Check AI drafts and humanize them before publishing.
📢
Marketers
Ensure every campaign asset sounds human. Detect and fix AI patterns before copy goes live.
💼
HR & Recruiters
Screen AI-written CVs and cover letters. Identify candidates who used AI to write their applications.
📰
Publishers
Maintain editorial standards. Scan submitted articles for AI content before publication decisions.
What Users Say

Trusted by students, writers & educators

Used in 50+ countries. Free to start, no signup required.

★★★★★
Scanned my thesis, found 3 AI-flagged sections I didn't know sounded robotic. Humanized them instantly. Passed Turnitin first try. Genuinely incredible tool.
AP
Arjun Patel
PhD Student, India
★★★★★
As a teacher I use this weekly to check student work. The sentence-level highlighting makes it crystal clear which parts are AI. Finally a free tool that actually works properly.
SM
Sarah Mitchell
High School Teacher, USA
★★★★★
I run a content agency in Dubai. My team uses DetectAI before every client delivery. The detect-then-humanize workflow saves us hours every single week. Worth every dirham.
KA
Khalid Al Mansoori
Content Agency, UAE
Pricing

Simple, honest pricing

Start free today. Upgrade when you need more. Cancel anytime, no questions asked.

Monthly Annual Save 35%
Free
$0
forever · no card needed
  • ✓500 words/day detection
  • ✓AI score + sentence highlights
  • ✓300 words/day humanizer
  • ✓3 tone options
  • –File upload (PDF/DOCX)
  • –Plagiarism checker
Basic
$9
per month · cancel anytime
$9/mo billed monthly
  • ✓Unlimited detection
  • ✓5,000 words/day humanizer
  • ✓All 4 tone options
  • ✓Priority speed
  • –File upload (PDF/DOCX)
  • –Plagiarism checker
🔥 Most Popular
Pro
$19
per month · cancel anytime
$19/mo billed monthly
  • ✓Everything in Basic
  • ✓Unlimited humanizing
  • ✓File upload (PDF, DOCX, TXT)
  • ✓Plagiarism checker
  • ✓Batch file scanning
  • ✓All 5 tones incl. Academic+
Team
$39
per month · 5 seats
$39/mo billed monthly
  • ✓Everything in Pro
  • ✓5 team members
  • ✓API access
  • ✓Team dashboard
  • ✓Bulk processing
  • ✓Priority support
FAQ

Common questions

How accurate is the AI detection? +
DetectAI uses advanced language pattern analysis to detect AI-generated content with approximately 94% accuracy on standard AI outputs. It analyses perplexity, burstiness, sentence structure uniformity, and vocabulary patterns. No detector is 100% accurate — use results as a strong indicator alongside your own judgement.
Which AI models can it detect? +
DetectAI detects content from ChatGPT (GPT-3.5, GPT-4, GPT-4o, GPT-5), Google Gemini, Claude, Llama, Mistral, DeepSeek, and most other major language models. The detector is continuously updated as new AI models are released.
What file formats can I upload? +
Pro and Team plan users can upload PDF, DOCX, DOC, and TXT files up to 10MB. Text is extracted automatically and full detection runs across the entire document. Batch uploading multiple files at once is available on the Team plan.
Does the humanizer bypass Turnitin and GPTZero? +
Our humanizer significantly reduces AI detection scores across Turnitin, GPTZero, Originality.ai, Copyleaks, and ZeroGPT. Users report average post-humanization scores below 15%. No tool guarantees 100% results as detectors constantly update — we recommend re-scanning after humanizing to verify your score.
Is my text stored or used for training? +
No. We do not store, log, or use your submitted text for any purpose. All processing happens in real time and is immediately discarded. Your content remains completely private and confidential.
Can I cancel my subscription anytime? +
Yes. Cancel Basic, Pro, or Team at any time with one click — no contracts, no cancellation fees, no questions asked. You keep access until the end of your current billing period.

What is an AI content detector?

An AI content detector analyses text to determine the probability that it was written by an artificial intelligence model rather than a human. Tools like DetectAI look for patterns in sentence structure, vocabulary predictability, and writing rhythm that are characteristic of AI-generated content from tools like ChatGPT, Gemini, and Claude.

Why do you need to humanize AI text?

AI-written text has recognisable patterns that trigger detection tools used by universities, Google's search algorithm, and content platforms. Students face academic integrity checks, bloggers face SEO penalties, and professionals risk appearing inauthentic. Humanizing AI text rewrites it to match the natural variation and personality of human writing while preserving all your original meaning.

DetectAI vs GPTZero — what's the difference?

Unlike GPTZero or ZeroGPT which only detect AI content, DetectAI combines detection and humanization in one seamless workflow. You detect, see exactly which sentences are flagged, fix them instantly, and re-verify — all without switching tabs. The Pro plan adds PDF and DOCX file upload, matching premium competitors at a fraction of the price.

Ready to detect & fix AI content?

Free forever for basic use. No signup, no credit card. Results in 5 seconds.

🔍 Try DetectAI Free →
N
Nitin — Founder, DetectAI
Built from Dubai · detectai.one
"I got frustrated with AI detectors that tell you your score is 87% and leave you completely stuck. What does that mean? What do I actually change? I built DetectAI because a score without an explanation is useless. Every user deserves to know exactly why their text was flagged — not just that it was."