SvelteKit Detector
Paste any URL and instantly see whether the site is built with SvelteKit — with the matched evidence.
We do not store the URL you audit. Want the full audit (performance / images / SEO / accessibility + real-browser speed test)? → run the full audit
Why check this
SvelteKit bundles are usually small; when they are slow, images and third-party scripts are the usual suspects.
What this is
SvelteKit is the application framework for Svelte. Product sites and dashboards use it for server rendering and streaming. Confirming `__sveltekit` and `_app/immutable` pins hydration boundaries and immutable-asset cache policy. Immutable asset folders make caching straightforward when adapters do not rename them.
How to tell from a public page
- [SvelteKit] Runtime globals or inline data include `__sveltekit`.
- [SvelteKit] Asset paths include `_app/immutable`.
- [SvelteKit] Class names or comments leave `svelte-` compile traces.
- [SvelteKit] Form progressive enhancement and navigation hooks follow framework defaults.
How to read the result
Confirm when runtime markers or immutable paths reproduce; a conference talk title does not qualify. Absence can mean an adapter rewrote the asset root. Component-library demos sometimes ship leftover framework markers. After a hit, inspect oversized +page data and unsplit client modules.
What to do next
Shrink load data, set adapter cache headers, and defer non-critical widgets. Deploys often land on Vercel — see Vercel detector. Continue the site audit on run the full performance / images / SEO / accessibility audit on the home page. Capture `_app/immutable` paths for cache-policy reviews.
Related detectors
FAQ
How is SvelteKit detected?
From structural signatures in the public HTML and response headers (domains, paths, attributes, scripts). Every verdict lists how many times each pattern matched — nothing is guessed.
Can the result be wrong?
If only a bare brand keyword matches without structural evidence, we label it \u201clikely\u201d instead of \u201cconfirmed\u201d — we would rather under-report than cry wolf.
Do you save the URLs I check?
No. The audit runs inside the request and the URL you paste is not written to storage. There are no third-party tracking scripts on the page either, so no log of who checked what exists. Copy the result yourself if you want a record.
Can a website hide what it is built with?
Partly, but rarely completely. The HTML sent to your browser, the response headers, script paths and asset structure have to be exposed to work, so there is always something readable. Server-side code, build config and private APIs stay invisible. That is why this tool reports the evidence it found rather than claiming a full picture. No match does not mean the technology is absent.
Optimization help is available
Tell me your URL and what you want fixed — you get a clear scope, price and timeline.
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