# What Is This Website Built With? Free Checker

> See the framework, hosting, CSS, libraries, analytics, fonts and colors behind any website. Free website technology and design checker.

Canonical page: https://sitepeel.dev/free-tools/built-with/

Free stack checker

The framework, hosting, libraries, fonts and colors behind a site.

What you get

-   Frameworks, site builders and CMS
-   Animation, 3D and UI libraries
-   Fonts, analytics and hosting

Paste a link above to start

FAQ

## Questions

### How is the stack detected?

Sitepeel loads the page and looks for clear signs: framework markers, script and asset addresses, response headers and CSS patterns. Each result shows its evidence.

### Why is something missing?

Server-side tools, databases and code that never reaches the browser can’t be seen from outside. Some sites also hide or rename their tools.

### What about the design?

The fonts and colors come from the same measurements as the DESIGN.md generator. Generate the full DESIGN.md for the complete design system.

More free tools

## Keep looking closer

[All free tools](https://sitepeel.dev/free-tools/)

[01 · Design **DESIGN.md generator** Turn any website into a detailed DESIGN.md for AI coding agents.](https://sitepeel.dev/design-md/) [02 · Clone **Clone prompt** Turn any website into one prompt that rebuilds it in Antigravity, Cursor or Claude Code, assets and all.](https://sitepeel.dev/free-tools/clone-prompt/) [03 · Review **AI slop checker** See if a website looks AI-generated, what gives it away and how to fix it.](https://sitepeel.dev/free-tools/ai-slop-checker/) [04 · Assets **Asset extractor** Download every image, SVG, video, 3D model and animation from a website.](https://sitepeel.dev/free-tools/asset-extractor/) [05 · Layout **Responsive checker** See a website on phones, tablets, laptops and monitors at once, and find what breaks.](https://sitepeel.dev/free-tools/responsive-checker/) [06 · Capture **Website screenshot** Full-page screenshots of any website, framed and ready to share.](https://sitepeel.dev/free-tools/screenshot/) [07 · Type **What font is this?** Find every font a website uses, with weights, sizes and where to get them.](https://sitepeel.dev/free-tools/font-finder/) [08 · Color **Color palette generator** Generate palettes, or pull the real color palette from any website.](https://sitepeel.dev/free-tools/color-palette-generator/)