Bolt is an AI-powered website and application builder developed by StackBlitz, primarily used by developers and technical users who want to rapidly prototype and deploy full-stack web applications directly from natural language prompts. The platform generates production-ready code in the browser, making it a distinctive target for detection due to its tight integration with StackBlitz's runtime infrastructure. AIWebsiteDetector's detection engine identifies Bolt-built sites through a combination of 3 script patterns, 3 HTML patterns, and 2 meta tag patterns embedded in the page markup, alongside 2 CDN domains that consistently appear in asset delivery and 2 HTTP response headers that expose the underlying platform. These signals work in combination to produce reliable detections across a range of project types, from single-page applications to more complex full-stack deployments. Bolt sites are characteristically hosted within the bolt.new ecosystem or exported to connected deployment targets, and the platform's deep reliance on WebContainer technology leaves consistent, identifiable fingerprints across both the DOM structure and network layer that distinguish it cleanly from other AI website builders.
Detect Bolt Websites — Free Tool
Enter any URL to check if it was built with Bolt. Instant results, no account required.
How we detect Bolt — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Bolt Websites
Script Patterns
3 patterns
CDN Domains
2 patterns
HTML Patterns
3 patterns
HTTP Headers
2 patterns
Meta Tags
2 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for bolt-specific patterns in the HTML.
2. Look for Script Files
Check the Network tab in DevTools for JavaScript files loaded from Bolt domains.
3. Check CDN Domains
Network requests to these CDN domains indicate a Bolt site:
bolt\.hoststackblitz\.io4. 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 made with Bolt?
Paste the URL into the free scanner above. We check for Bolt.new-specific signals including StackBlitz CDN references, Bolt artifact markers, and characteristic build patterns — and return a confidence score in seconds.
What is Bolt.new?
Bolt.new (by StackBlitz) is an AI-powered web app builder that generates full-stack web applications from natural language prompts. It runs entirely in the browser and supports React, Vue, and other frameworks with instant deployment.
How do you detect a Bolt website?
Bolt-generated sites often contain StackBlitz CDN references and Bolt artifact markers embedded in the build. Our scanner identifies these alongside framework fingerprints to determine whether Bolt was used.
Is Bolt better than Lovable?
Bolt is faster at generating full-stack prototypes and gives developers more control over the output. Lovable is more user-friendly for non-coders and produces more polished UI by default. Lovable wins on ease; Bolt wins on speed and code control.
Is Bolt better than v0?
Bolt focuses on complete app generation, while v0 by Vercel focuses on generating UI components. Bolt is better for shipping a whole working app quickly; v0 is better for generating specific React components to drop into an existing project.
What websites are built with Bolt?
Browse our Bolt gallery to see real websites detected by our scanner — with AI probability scores, screenshots, and tech stack analysis.
About Bolt
Bolt is a leading ai website builder used by thousands of businesses and developers worldwide. Our detection engine can identify Bolt-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 Website Builder
- Signals Used
- 10 patterns
- Accuracy
- High
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