diff --git a/lib/src/Components/Templates/OverlayItemsIndexPage.spec.tsx b/lib/src/Components/Templates/OverlayItemsIndexPage.spec.tsx
new file mode 100644
index 00000000..102cca71
--- /dev/null
+++ b/lib/src/Components/Templates/OverlayItemsIndexPage.spec.tsx
@@ -0,0 +1,171 @@
+/* eslint-disable camelcase */
+/* eslint-disable @typescript-eslint/no-explicit-any */
+/* eslint-disable @typescript-eslint/no-unsafe-argument */
+
+import { render, screen, act, waitFor } from '@testing-library/react'
+import { MemoryRouter } from 'react-router-dom'
+import { describe, it, expect, beforeEach, vi } from 'vitest'
+
+import { OverlayItemsIndexPage } from './OverlayItemsIndexPage'
+
+import type { Item } from '#types/Item'
+
+vi.mock('./ItemCard', () => ({
+  ItemCard: ({ i }: { i: Item }) => <div data-testid={`item-${i.id}`}>{i.name}</div>,
+}))
+vi.mock('./MapOverlayPage', () => ({
+  MapOverlayPage: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
+}))
+vi.mock('#components/Map/Subcomponents/Controls/Control', () => ({
+  Control: () => null,
+}))
+vi.mock('#components/Map/Subcomponents/Controls/SearchControl', () => ({
+  SearchControl: () => null,
+}))
+vi.mock('#components/Map/Subcomponents/Controls/TagsControl', () => ({
+  TagsControl: () => null,
+}))
+vi.mock('#components/Profile/Subcomponents/PlusButton', () => ({
+  PlusButton: () => null,
+}))
+vi.mock('#components/Map/Subcomponents/ItemPopupComponents', () => ({
+  PopupStartEndInput: () => null,
+}))
+vi.mock('#components/Input', () => ({
+  TextInput: () => null,
+}))
+vi.mock('react-toastify', () => ({
+  toast: { success: vi.fn(), error: vi.fn() },
+}))
+vi.mock('react-router-dom', async () => {
+  const actual = await vi.importActual('react-router-dom')
+  return { ...actual, useNavigate: () => vi.fn() }
+})
+
+vi.mock('#components/Auth/useAuth')
+vi.mock('#components/Map/hooks/useFilter')
+vi.mock('#components/Map/hooks/useItems')
+vi.mock('#components/Map/hooks/useLayers')
+vi.mock('#components/Map/hooks/useTags')
+
+let observerCallback: IntersectionObserverCallback
+const mockObserve = vi.fn()
+const mockDisconnect = vi.fn()
+
+class MockIntersectionObserver {
+  // eslint-disable-next-line promise/prefer-await-to-callbacks
+  constructor(cb: IntersectionObserverCallback) {
+    observerCallback = cb
+  }
+
+  observe = mockObserve
+  disconnect = mockDisconnect
+  unobserve = vi.fn()
+}
+vi.stubGlobal('IntersectionObserver', MockIntersectionObserver)
+
+function makeItems(count: number): Item[] {
+  return Array.from({ length: count }, (_, i) => ({
+    id: `item-${String(i)}`,
+    name: `Item ${String(i)}`,
+    date_created: new Date(2025, 0, count - i).toISOString(),
+    layer: { name: 'places' } as Item['layer'],
+  })) as Item[]
+}
+
+const mockLayer = {
+  name: 'places',
+  menuText: 'Places',
+  itemType: { show_start_end_input: false },
+  userProfileLayer: false,
+  api: { createItem: vi.fn(), deleteItem: vi.fn() },
+}
+
+function triggerIntersection() {
+  observerCallback(
+    [{ isIntersecting: true } as IntersectionObserverEntry],
+    {} as IntersectionObserver,
+  )
+}
+
+describe('OverlayItemsIndexPage – infinite scroll', () => {
+  beforeEach(async () => {
+    vi.clearAllMocks()
+
+    const { useAuth } = await import('#components/Auth/useAuth')
+    const { useFilterTags } = await import('#components/Map/hooks/useFilter')
+    const { useItems, useAddItem, useRemoveItem } = await import('#components/Map/hooks/useItems')
+    const { useLayers } = await import('#components/Map/hooks/useLayers')
+    const { useTags, useAddTag, useGetItemTags } = await import('#components/Map/hooks/useTags')
+
+    vi.mocked(useAuth).mockReturnValue({ user: null } as any)
+    vi.mocked(useFilterTags).mockReturnValue([])
+    vi.mocked(useItems).mockReturnValue(makeItems(50))
+    vi.mocked(useAddItem).mockReturnValue(vi.fn())
+    vi.mocked(useRemoveItem).mockReturnValue(vi.fn())
+    vi.mocked(useLayers).mockReturnValue([mockLayer] as any)
+    vi.mocked(useTags).mockReturnValue([])
+    vi.mocked(useAddTag).mockReturnValue(vi.fn())
+    vi.mocked(useGetItemTags).mockReturnValue((() => []) as any)
+  })
+
+  function renderPage() {
+    return render(
+      <MemoryRouter>
+        <OverlayItemsIndexPage url='/places' layerName='places' />
+      </MemoryRouter>,
+    )
+  }
+
+  it('renders the first batch of 30 items with a sentinel', () => {
+    renderPage()
+
+    expect(screen.getAllByTestId(/^item-/)).toHaveLength(30)
+    expect(screen.getByTestId('scroll-sentinel')).toBeInTheDocument()
+  })
+
+  it('loads more items when the sentinel becomes visible', async () => {
+    renderPage()
+    expect(mockObserve).toHaveBeenCalled()
+    expect(screen.getAllByTestId(/^item-/)).toHaveLength(30)
+
+    act(() => {
+      triggerIntersection()
+    })
+
+    await waitFor(() => {
+      expect(screen.getAllByTestId(/^item-/)).toHaveLength(50)
+    })
+  })
+
+  it('removes the sentinel after all items are loaded', async () => {
+    renderPage()
+    expect(mockObserve).toHaveBeenCalled()
+
+    act(() => {
+      triggerIntersection()
+    })
+
+    await waitFor(() => {
+      expect(screen.queryByTestId('scroll-sentinel')).not.toBeInTheDocument()
+    })
+  })
+
+  it('only loads one batch when triggered twice before re-render', async () => {
+    const { useItems } = await import('#components/Map/hooks/useItems')
+    vi.mocked(useItems).mockReturnValue(makeItems(80))
+
+    renderPage()
+    expect(mockObserve).toHaveBeenCalled()
+    expect(screen.getAllByTestId(/^item-/)).toHaveLength(30)
+
+    act(() => {
+      triggerIntersection()
+      triggerIntersection()
+    })
+
+    await waitFor(() => {
+      expect(screen.getAllByTestId(/^item-/)).toHaveLength(54)
+    })
+  })
+})
diff --git a/lib/src/Components/Templates/OverlayItemsIndexPage.tsx b/lib/src/Components/Templates/OverlayItemsIndexPage.tsx
index f5aec8a1..aaf19ec3 100644
--- a/lib/src/Components/Templates/OverlayItemsIndexPage.tsx
+++ b/lib/src/Components/Templates/OverlayItemsIndexPage.tsx
@@ -22,6 +22,7 @@ import { PlusButton } from '#components/Profile/Subcomponents/PlusButton'
 import { hashTagRegex } from '#utils/HashTagRegex'
 import { randomColor } from '#utils/RandomColor'
 
+import { filterSortAndPaginate } from './filterSortAndPaginate'
 import { ItemCard } from './ItemCard'
 import { MapOverlayPage } from './MapOverlayPage'
 
@@ -40,8 +41,11 @@ export const OverlayItemsIndexPage = ({
 }) => {
   const [loading, setLoading] = useState<boolean>(false)
   const [addItemPopupOpen, setAddItemPopupOpen] = useState<boolean>(false)
-
+  const [itemsToShow, setItemsToShow] = useState<number>(30)
   const tabRef = useRef<HTMLFormElement>(null)
+  const sentinelRef = useRef<HTMLDivElement>(null)
+  const scrollContainerRef = useRef<HTMLDivElement>(null)
+  const isLoadingMoreRef = useRef(false)
 
   function scroll() {
     tabRef.current?.scrollIntoView()
@@ -66,6 +70,45 @@ export const OverlayItemsIndexPage = ({
 
   const layer = layers.find((l) => l.name === layerName)
 
+  const { visibleItems, hasMore } = filterSortAndPaginate(
+    items,
+    layerName,
+    filterTags,
+    getItemTags,
+    itemsToShow,
+  )
+
+  useEffect(() => {
+    const sentinel = sentinelRef.current
+    const scrollContainer = scrollContainerRef.current
+    if (!sentinel || !scrollContainer) return
+
+    const observer = new IntersectionObserver(
+      (entries) => {
+        const entry = entries[0]
+        if (entry.isIntersecting && !isLoadingMoreRef.current && hasMore) {
+          isLoadingMoreRef.current = true
+          setItemsToShow((prev) => prev + 24)
+        }
+      },
+      {
+        root: scrollContainer,
+        rootMargin: '400px',
+        threshold: 0.1,
+      },
+    )
+
+    observer.observe(sentinel)
+
+    return () => {
+      observer.disconnect()
+    }
+  }, [hasMore, visibleItems.length])
+
+  useEffect(() => {
+    isLoadingMoreRef.current = false
+  }, [visibleItems.length])
+
   const submitNewItem = async (evt: React.FormEvent<HTMLFormElement>) => {
     evt.preventDefault()
     const formItem: Item = {} as Item
@@ -130,44 +173,18 @@ export const OverlayItemsIndexPage = ({
               <TagsControl />
             </Control>
           </div>
-          <div className='tw:overflow-scroll fade tw:flex-1'>
+          <div ref={scrollContainerRef} className='tw:overflow-scroll fade tw:flex-1'>
             <div className='tw:columns-1 tw:md:columns-2 tw:lg:columns-3 tw:2xl:columns-4 tw:gap-6 tw:pt-4'>
-              {items
-                .filter((i) => i.layer?.name === layerName)
-                .filter((item) =>
-                  filterTags.length === 0
-                    ? item
-                    : filterTags.some((tag) =>
-                        getItemTags(item).some(
-                          (filterTag) =>
-                            filterTag.name.toLocaleLowerCase() === tag.name.toLocaleLowerCase(),
-                        ),
-                      ),
-                )
-                .sort((a, b) => {
-                  // Convert date_created to milliseconds, handle undefined by converting to lowest possible date (0 milliseconds)
-                  const dateA = a.date_updated
-                    ? new Date(a.date_updated).getTime()
-                    : a.date_created
-                      ? new Date(a.date_created).getTime()
-                      : 0
-                  const dateB = b.date_updated
-                    ? new Date(b.date_updated).getTime()
-                    : b.date_created
-                      ? new Date(b.date_created).getTime()
-                      : 0
-                  return dateB - dateA // Subtracts milliseconds which are numbers
-                })
-                .map((i, k) => (
-                  <div key={k} className='tw:break-inside-avoid tw:mb-6'>
-                    <ItemCard
-                      i={i}
-                      loading={loading}
-                      url={url}
-                      deleteCallback={() => deleteItem(i)}
-                    />
-                  </div>
-                ))}
+              {visibleItems.map((i) => (
+                <div key={i.id} className='tw:break-inside-avoid tw:mb-6'>
+                  <ItemCard
+                    i={i}
+                    loading={loading}
+                    url={url}
+                    deleteCallback={() => deleteItem(i)}
+                  />
+                </div>
+              ))}
               {addItemPopupOpen && (
                 <form ref={tabRef} autoComplete='off' onSubmit={(e) => submitNewItem(e)}>
                   <div className='tw:cursor-pointer tw:break-inside-avoid card tw:border-[1px] tw:border-base-300 card-body tw:shadow-xl tw:bg-base-100 tw:text-base-content tw:p-6 tw:mb-10'>
@@ -208,6 +225,15 @@ export const OverlayItemsIndexPage = ({
                 </form>
               )}
             </div>
+            {hasMore && (
+              <div
+                ref={sentinelRef}
+                data-testid='scroll-sentinel'
+                className='tw:w-full tw:py-8 tw:flex tw:justify-center'
+              >
+                <span className='loading loading-spinner loading-lg'></span>
+              </div>
+            )}
           </div>
         </div>
       </MapOverlayPage>
diff --git a/lib/src/Components/Templates/filterSortAndPaginate.spec.ts b/lib/src/Components/Templates/filterSortAndPaginate.spec.ts
new file mode 100644
index 00000000..cee6bdb9
--- /dev/null
+++ b/lib/src/Components/Templates/filterSortAndPaginate.spec.ts
@@ -0,0 +1,145 @@
+/* eslint-disable camelcase */ // Directus database fields use snake_case
+import { describe, it, expect } from 'vitest'
+
+import { filterSortAndPaginate } from './filterSortAndPaginate'
+
+import type { Item } from '#types/Item'
+import type { Tag } from '#types/Tag'
+
+function makeItem(overrides: Partial<Item> & { id: string; layerName?: string }): Item {
+  const { layerName, ...rest } = overrides
+  return {
+    ...rest,
+    layer: layerName ? ({ name: layerName } as Item['layer']) : undefined,
+  } as Item
+}
+
+function getItemTags(item: Item): Tag[] {
+  if (!item.text) return []
+  const matches = item.text.match(/#([a-zA-ZÀ-ÖØ-öø-ʸ0-9_-]+)/g)
+  if (!matches) return []
+  return matches.map((m) => ({
+    id: m,
+    name: m.slice(1),
+    color: '#000',
+  }))
+}
+
+const PLACES = 'places'
+const EVENTS = 'events'
+
+const items: Item[] = [
+  makeItem({ id: '1', layerName: PLACES, text: '#nature', date_updated: '2025-03-01T00:00:00Z' }),
+  makeItem({ id: '2', layerName: PLACES, text: '#food', date_created: '2025-02-01T00:00:00Z' }),
+  makeItem({
+    id: '3',
+    layerName: PLACES,
+    text: '#nature #food',
+    date_updated: '2025-01-01T00:00:00Z',
+  }),
+  makeItem({ id: '4', layerName: EVENTS, text: '#nature', date_updated: '2025-04-01T00:00:00Z' }),
+  makeItem({ id: '5', layerName: PLACES, text: '', date_created: '2025-05-01T00:00:00Z' }),
+  makeItem({ id: '6', text: '#nature' }), // no layer
+]
+
+describe('filterSortAndPaginate', () => {
+  describe('layer filtering', () => {
+    it('returns only items matching the given layer name', () => {
+      const { visibleItems } = filterSortAndPaginate(items, PLACES, [], getItemTags, 100)
+      expect(visibleItems.every((i) => i.layer?.name === PLACES)).toBe(true)
+      expect(visibleItems).toHaveLength(4) // ids 1,2,3,5
+    })
+
+    it('excludes items with no layer', () => {
+      const { visibleItems } = filterSortAndPaginate(items, PLACES, [], getItemTags, 100)
+      expect(visibleItems.find((i) => i.id === '6')).toBeUndefined()
+    })
+  })
+
+  describe('tag filtering', () => {
+    it('returns all layer items when no filter tags are active', () => {
+      const { visibleItems } = filterSortAndPaginate(items, PLACES, [], getItemTags, 100)
+      expect(visibleItems).toHaveLength(4)
+    })
+
+    it('keeps only items that have at least one matching tag', () => {
+      const filterTags: Tag[] = [{ id: 't1', name: 'food', color: '#000' }]
+      const { visibleItems } = filterSortAndPaginate(items, PLACES, filterTags, getItemTags, 100)
+      expect(visibleItems.map((i) => i.id).sort()).toEqual(['2', '3'])
+    })
+
+    it('excludes items with no matching tags', () => {
+      const filterTags: Tag[] = [{ id: 't1', name: 'food', color: '#000' }]
+      const { visibleItems } = filterSortAndPaginate(items, PLACES, filterTags, getItemTags, 100)
+      expect(visibleItems.find((i) => i.id === '1')).toBeUndefined()
+    })
+
+    it('matches tags case-insensitively', () => {
+      const filterTags: Tag[] = [{ id: 't1', name: 'Nature', color: '#000' }]
+      const { visibleItems } = filterSortAndPaginate(items, PLACES, filterTags, getItemTags, 100)
+      // ids 1 (#nature) and 3 (#nature #food)
+      expect(visibleItems.map((i) => i.id)).toContain('1')
+      expect(visibleItems.map((i) => i.id)).toContain('3')
+    })
+
+    it('items with no text (no tags) are excluded when filter is active', () => {
+      const filterTags: Tag[] = [{ id: 't1', name: 'nature', color: '#000' }]
+      const { visibleItems } = filterSortAndPaginate(items, PLACES, filterTags, getItemTags, 100)
+      expect(visibleItems.find((i) => i.id === '5')).toBeUndefined()
+    })
+  })
+
+  describe('sorting (newest first)', () => {
+    it('sorts by date_updated descending', () => {
+      const { visibleItems } = filterSortAndPaginate(items, PLACES, [], getItemTags, 100)
+      const ids = visibleItems.map((i) => i.id)
+      expect(ids).toEqual(['5', '1', '2', '3'])
+    })
+
+    it('falls back to date_created when date_updated is absent', () => {
+      const a = makeItem({ id: 'a', layerName: PLACES, date_created: '2025-06-01T00:00:00Z' })
+      const b = makeItem({ id: 'b', layerName: PLACES, date_updated: '2025-05-01T00:00:00Z' })
+      const { visibleItems } = filterSortAndPaginate([a, b], PLACES, [], getItemTags, 100)
+      expect(visibleItems[0].id).toBe('a')
+    })
+
+    it('items with no dates sort to the end', () => {
+      const dated = makeItem({ id: 'd', layerName: PLACES, date_created: '2025-01-01T00:00:00Z' })
+      const undated = makeItem({ id: 'u', layerName: PLACES })
+      const { visibleItems } = filterSortAndPaginate([undated, dated], PLACES, [], getItemTags, 100)
+      expect(visibleItems[0].id).toBe('d')
+      expect(visibleItems[1].id).toBe('u')
+    })
+  })
+
+  describe('pagination', () => {
+    it('limits visible items to itemsToShow', () => {
+      const { visibleItems, hasMore } = filterSortAndPaginate(items, PLACES, [], getItemTags, 2)
+      expect(visibleItems).toHaveLength(2)
+      expect(hasMore).toBe(true)
+    })
+
+    it('hasMore is false when all items fit within the limit', () => {
+      const { hasMore } = filterSortAndPaginate(items, PLACES, [], getItemTags, 100)
+      expect(hasMore).toBe(false)
+    })
+
+    it('hasMore is false when itemsToShow equals the item count exactly', () => {
+      const { visibleItems, hasMore } = filterSortAndPaginate(items, PLACES, [], getItemTags, 4)
+      expect(visibleItems).toHaveLength(4)
+      expect(hasMore).toBe(false)
+    })
+
+    it('returns empty array when no items match', () => {
+      const { visibleItems, hasMore } = filterSortAndPaginate(
+        items,
+        'nonexistent',
+        [],
+        getItemTags,
+        30,
+      )
+      expect(visibleItems).toEqual([])
+      expect(hasMore).toBe(false)
+    })
+  })
+})
diff --git a/lib/src/Components/Templates/filterSortAndPaginate.ts b/lib/src/Components/Templates/filterSortAndPaginate.ts
new file mode 100644
index 00000000..95979b95
--- /dev/null
+++ b/lib/src/Components/Templates/filterSortAndPaginate.ts
@@ -0,0 +1,48 @@
+import type { Item } from '#types/Item'
+import type { Tag } from '#types/Tag'
+
+/**
+ * Pure helper that filters items by layer and tags, sorts by date (newest first),
+ * and returns a paginated slice.
+ *
+ * Extracted from OverlayItemsIndexPage for testability.
+ *
+ * @category Templates
+ */
+export function filterSortAndPaginate(
+  items: Item[],
+  layerName: string,
+  filterTags: Tag[],
+  getItemTags: (item: Item) => Tag[],
+  itemsToShow: number,
+): { visibleItems: Item[]; hasMore: boolean } {
+  const filteredAndSortedItems = items
+    .filter((i) => i.layer?.name === layerName)
+    .filter((item) =>
+      filterTags.length === 0
+        ? true
+        : filterTags.some((tag) =>
+            getItemTags(item).some(
+              (itemTag) => itemTag.name.toLocaleLowerCase() === tag.name.toLocaleLowerCase(),
+            ),
+          ),
+    )
+    .sort((a, b) => {
+      const dateA = a.date_updated
+        ? new Date(a.date_updated).getTime()
+        : a.date_created
+          ? new Date(a.date_created).getTime()
+          : 0
+      const dateB = b.date_updated
+        ? new Date(b.date_updated).getTime()
+        : b.date_created
+          ? new Date(b.date_created).getTime()
+          : 0
+      return dateB - dateA
+    })
+
+  const visibleItems = filteredAndSortedItems.slice(0, itemsToShow)
+  const hasMore = filteredAndSortedItems.length > itemsToShow
+
+  return { visibleItems, hasMore }
+}