diff --git a/docs/analytics.md b/docs/analytics.md
index 1cf213d..23d1152 100644
--- a/docs/analytics.md
+++ b/docs/analytics.md
@@ -196,8 +196,8 @@ with a "could not be loaded" message.
 Because it is a real page, fetch-navigation handles it like any other internal
 link: clicking the 📊 pen (or any link to `/_a`) fetches the server-rendered
 HTML, swaps the dynamic regions and mounts the Vue analytics app in place. The
-range selector updates the URL query string (`?range=week` etc.) so links to
-a specific range can be shared.
+range selector updates the URL hash (`#week` etc.) so links to a specific
+range can be shared.
 
 `AnalyticsView.vue` is no longer a full-screen overlay; the `body.analytics-open`
 page-chrome hiding and `#/analytics/<range>` hash routing have been removed.
diff --git a/frontend/src/AnalyticsView.vue b/frontend/src/AnalyticsView.vue
index 5550182..ff52657 100644
--- a/frontend/src/AnalyticsView.vue
+++ b/frontend/src/AnalyticsView.vue
@@ -87,7 +87,7 @@ const range = ref(RANGES[props.initialRange] ? props.initialRange : 'week')
 // Keep the URL shareable when the range changes.
 watch(range, (r) => {
   const url = new URL(location.href)
-  url.searchParams.set('range', r)
+  url.hash = r
   history.replaceState(null, '', url)
 })
 
diff --git a/frontend/src/analytics-main.js b/frontend/src/analytics-main.js
index 2c1ee20..b65aa8d 100644
--- a/frontend/src/analytics-main.js
+++ b/frontend/src/analytics-main.js
@@ -9,7 +9,7 @@ let app = null
 export function mount(container) {
   if (app) return
   app = createApp(AnalyticsView, {
-    initialRange: new URLSearchParams(location.search).get('range') || 'week',
+    initialRange: location.hash.slice(1) || 'week',
   })
   app.mount(container)
 }