Svelte is a compiler-based JavaScript framework that converts component code into highly optimized vanilla JavaScript at build time, rather than shipping a runtime framework to the browser — appealing to developers who prioritize small bundle sizes and raw performance. Our engine detects Svelte through 2 script patterns and 2 HTML patterns tied to its compiled output conventions, though because Svelte's compilation removes much of the framework's own signature, detection confidence benefits from corroborating signals like SvelteKit-specific routing artifacts when present. Svelte is an open-source compiler, not a hosting platform. Documented at svelte.dev.
Paste any URL to instantly detect whether it was built with Svelte. Our engine checks 4 technical signals.
Svelte is used across many industries. These are the most common website types built on this platform:
Businesses of all sizes
Fast, reliable site building with professional results
Designers and developers
Powerful tools with minimal setup
Startups
Quick launch with scalable infrastructure
Content creators
Beautiful presentation for your work
Every Svelte website leaves distinctive technical fingerprints. Here's what to look for:
JavaScript Patterns
2 script patterns linked to Svelte
HTML Attributes
2 HTML patterns in the page source
Explore how Svelte compares to similar javascript framework tools: