Free AI Detection Tools That Actually Work

GPTDetect.co was built out of frustration with the AI detection industry.

Most "AI detectors" are expensive, inaccurate, and invasive. They store your text, sell your data, or charge $20/month for basic features. Worse — they're often wrong, flagging human writing as AI and missing obvious ChatGPT output.

We took a different approach: privacy-first, client-side tools that analyze text patterns without sending your data anywhere. Everything runs in your browser. Your text never touches our servers.

Why We Built This

As AI tools like ChatGPT became mainstream, we noticed three problems:
1. Teachers needed ways to spot AI-generated essays but couldn't afford enterprise tools
2. Students wanted to check their own writing to make sure it didn't "sound like AI"
3. Professionals were paranoid their emails, resumes, and reports sounded robotic

So we built 30+ free tools that solve specific problems:
• The "Email Bot Checker" highlights phrases like "I hope this email finds you well"
• The "Resume ATS Detector" flags buzzwords that trigger auto-rejection
• The "Professor Simulator" shows what Turnitin-style reports look like
• Fun quizzes like "Spot the Bot" make learning AI detection engaging

Our Philosophy

We're not anti-AI. We use AI tools ourselves. But we believe in honest, human-written work that uses AI as an assistant, not a replacement.

Our tools help you:
• Write better by avoiding robotic patterns
• Stay authentic by keeping your personal voice
• Learn the tells so you can spot AI writing yourself

We also showcase professional-grade tools like Originality.ai, Winston AI, and Copyleaks for those who need bulk processing or API access. We're transparent about affiliate relationships — if you buy through our links, we earn a small commission at no cost to you.

100% Free. Forever.

Our core tools will always be free. No signups, no paywalls, no data collection. Just tools that work.

— The GPTDetect Team

Our students

Our alumni found work at companies like Stripe, Astro and Polar

We’re proud to see students thrive in teams at Spotify, NASA, Notion, and other world-class organizations.

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"I had dabbled with static site generators before, but Astro just made sense. The content collections module was the breakthrough I needed. Everything was clear, well-paced, and actually fun to follow. I went from confused to confident in under two hours. "

"I was hesitant to switch from React-heavy workflows, but Astro changed everything. The hybrid rendering lesson alone was worth the price. It’s fast, it’s flexible, and it fits perfectly into my solo dev projects. "

"I’ve always struggled with overly complex JavaScript frameworks. Astro felt like a breath of fresh Nordic air—simple, fast, and focused on content. The modular lessons kept me motivated and actually made me look forward to coding after work. "

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"After 5 years of WordPress development, I felt trapped in an endless cycle of plugin conflicts and theme limitations. Astro gave me the freedom to build exactly what clients need without fighting against a CMS. My projects are faster, my code is cleaner, and my clients are happier. "

"My machine learning models were solving real problems, but presenting them through clunky internal tools was killing their impact. Astro let me build beautiful, fast dashboards that executives actually want to use. Now my data science work drives real business decisions. "

"Coming from a pure marketing background, I thought coding was this mystical art I'd never master. Astro's component approach made sense to my campaign-building brain. Now I'm launching my own SaaS platform and haven't looked back. "