What SvelteKit is
SvelteKit is the application framework for Svelte, compiling components to small JavaScript bundles rather than shipping a runtime. It deploys through adapters to Node.js, serverless functions and static output, so the same application can appear on very different platforms.
How DNSTrace.dev detects it
Detection reads the final HTTPS response and the first bytes of its markup. One matching signal is reported as strong evidence; two or more independent signals are reported as confirmed.
x-sveltekit-page— Emitted by the framework on server-rendered page responses./_app/immutable/ in markup— The content-hashed build output directory SvelteKit emits.
What a detection proves
The page was produced by SvelteKit.
What it does not prove
Which adapter or host is in use, or the framework version. A statically exported build will show the asset path without the response header.
Common questions
Why is only the asset path present on some SvelteKit sites?
The x-sveltekit-page header comes from the server runtime. A prerendered or statically exported build has no runtime to emit it, leaving the immutable asset path as the signal.
Compare with
Next.jsOpen source, maintained by Vercel
Application framework
NuxtOpen source, NuxtLabs
Site framework
AstroOpen source, the Astro Technology Company
Frontend application platform
VercelVercel, Inc.
Check a domain
Run a full lookup to see the delivery layer, the detected application stack, live TLS and the announcing network side by side.