Replit is a browser-based collaborative IDE and cloud hosting platform that has added AI coding features (Replit AI, previously Ghostwriter) to help developers build and deploy applications entirely in the browser — from writing code to running servers to deploying production apps without any local setup. It's particularly popular in education, competitive programming, and with developers who need a zero-setup environment for prototyping or collaboration. Replit can deploy web servers, databases, and static sites from the same workspace. Apps deployed on Replit are served from *.repl.co or *.replit.app domains with Replit-specific server headers, and the Replit runtime injects platform-specific variables into the environment. Replit's free tier is generous, with Core plans at $20/month for more compute and storage.
Detect Replit AI Websites — Free Tool
Enter any URL to check if it was built with Replit AI. Instant results, no account required.
How to Detect Replit AI Websites
Script Patterns
2 patterns
CDN Domains
2 patterns
HTML Patterns
2 patterns
HTTP Headers
1 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for replit ai-specific patterns in the HTML.
2. Look for Script Files
Check the Network tab in DevTools for JavaScript files loaded from Replit AI domains.
3. Check CDN Domains
Network requests to these CDN domains indicate a Replit AI site:
repl\.coreplit\.com4. Use AI Website Detector (Easiest)
Our automated scanner checks all these signals at once and gives you an instant confidence score. Just enter any URL above.
Frequently Asked Questions
Is this website built with Replit AI?
You can detect if any website was built with Replit AI by using our free scanner above. Just enter the URL and we'll analyze HTML patterns, JavaScript files, CDN domains, and HTTP headers to determine if Replit AI was used — with a confidence score.
How to detect if a website was built with Replit AI?
There are several ways to detect Replit AI: (1) View the page source and look for Replit AI-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Replit AI CDN domains, (3) Use our free tool — we check 7 detection signals automatically.
What websites are built with Replit AI?
Replit AI is used by thousands of websites worldwide. Our scanner has detected many Replit AI-built sites across different industries. You can scan any URL to check if it uses Replit AI.
How accurate is the Replit AI detection?
Our Replit AI detection engine checks 7 unique fingerprint signals, achieving high confidence results. We score each match and return a confidence percentage so you know how certain the detection is.
About Replit AI
Replit AI is a leading ai app builder used by thousands of businesses and developers worldwide. Our detection engine can identify Replit AI-built websites with high confidence by analyzing multiple technical signals.
Whether you're a developer doing competitive research, a designer looking for inspiration, or just curious about how a website was built — AI Website Detector gives you instant, accurate detection.
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Detection Info
- Category
- AI App Builder
- Signals Used
- 7 patterns
- Accuracy
- High
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