diff --git a/webapp/components/DonationInfo/DonationInfo.vue b/webapp/components/DonationInfo/DonationInfo.vue
index a80487c68..f68f5fe2d 100644
--- a/webapp/components/DonationInfo/DonationInfo.vue
+++ b/webapp/components/DonationInfo/DonationInfo.vue
@@ -57,5 +57,15 @@ export default {
   margin-top: 16px;
   cursor: pointer;
   color: $text-color-base;
+  text-decoration: none !important;
+
+  &:hover {
+    text-decoration: none !important;
+    color: $text-color-base !important;
+  }
+
+  .os-button {
+    color: revert;
+  }
 }
 </style>
diff --git a/webapp/components/LayoutToggle/LayoutToggle.spec.js b/webapp/components/LayoutToggle/LayoutToggle.spec.js
new file mode 100644
index 000000000..abbb2c800
--- /dev/null
+++ b/webapp/components/LayoutToggle/LayoutToggle.spec.js
@@ -0,0 +1,107 @@
+import { mount } from '@vue/test-utils'
+import LayoutToggle from './LayoutToggle'
+
+const localVue = global.localVue
+
+describe('LayoutToggle', () => {
+  let wrapper
+  let storageMap
+
+  beforeEach(() => {
+    storageMap = {}
+    jest.spyOn(Storage.prototype, 'getItem').mockImplementation((key) => storageMap[key] ?? null)
+    jest.spyOn(Storage.prototype, 'setItem').mockImplementation((key, val) => {
+      storageMap[key] = val
+    })
+  })
+
+  afterEach(() => {
+    jest.restoreAllMocks()
+  })
+
+  const mocks = {
+    $t: jest.fn((t) => t),
+  }
+
+  const Wrapper = (propsData = {}) => {
+    return mount(LayoutToggle, {
+      localVue,
+      mocks,
+      propsData,
+      stubs: { ClientOnly: { template: '<div><slot /></div>' } },
+    })
+  }
+
+  it('renders two buttons', () => {
+    wrapper = Wrapper()
+    const buttons = wrapper.findAll('button')
+    expect(buttons.length).toBe(2)
+  })
+
+  it('shows first button as filled when value is true (single column)', () => {
+    wrapper = Wrapper({ value: true })
+    const buttons = wrapper.findAll('.os-button')
+    expect(buttons.at(0).attributes('data-appearance')).toBe('filled')
+    expect(buttons.at(1).attributes('data-appearance')).toBe('ghost')
+  })
+
+  it('shows second button as filled when value is false (multi column)', () => {
+    wrapper = Wrapper({ value: false })
+    const buttons = wrapper.findAll('.os-button')
+    expect(buttons.at(0).attributes('data-appearance')).toBe('ghost')
+    expect(buttons.at(1).attributes('data-appearance')).toBe('filled')
+  })
+
+  it('emits input with true when single-column button is clicked', async () => {
+    wrapper = Wrapper({ value: false })
+    const buttons = wrapper.findAll('button')
+    await buttons.at(0).trigger('click')
+    expect(wrapper.emitted('input')).toEqual([[true]])
+  })
+
+  it('emits input with false when multi-column button is clicked', async () => {
+    wrapper = Wrapper({ value: true })
+    const buttons = wrapper.findAll('button')
+    await buttons.at(1).trigger('click')
+    expect(wrapper.emitted('input')).toEqual([[false]])
+  })
+
+  it('saves layout preference to localStorage on click', async () => {
+    wrapper = Wrapper({ value: false })
+    const buttons = wrapper.findAll('button')
+    await buttons.at(0).trigger('click')
+    expect(localStorage.setItem).toHaveBeenCalledWith('ocelot-layout-single-column', 'true')
+  })
+
+  it('reads layout preference from localStorage on mount', () => {
+    storageMap['ocelot-layout-single-column'] = 'true'
+    wrapper = Wrapper({ value: false })
+    expect(wrapper.emitted('input')).toEqual([[true]])
+  })
+
+  it('adds layout-toggle--hidden class when isMobile is true', async () => {
+    wrapper = Wrapper()
+    wrapper.setData({ windowWidth: 400 })
+    await wrapper.vm.$nextTick()
+    expect(wrapper.find('.layout-toggle').classes()).toContain('layout-toggle--hidden')
+  })
+
+  it('does not add layout-toggle--hidden class on desktop', async () => {
+    wrapper = Wrapper()
+    wrapper.setData({ windowWidth: 1200 })
+    await wrapper.vm.$nextTick()
+    expect(wrapper.find('.layout-toggle').classes()).not.toContain('layout-toggle--hidden')
+  })
+
+  it('has radiogroup role for accessibility', () => {
+    wrapper = Wrapper()
+    expect(wrapper.find('[role="radiogroup"]').exists()).toBe(true)
+  })
+
+  it('sets aria-checked correctly on radio buttons', () => {
+    wrapper = Wrapper({ value: true })
+    const radios = wrapper.findAll('[role="radio"]')
+    expect(radios.at(0).attributes('aria-checked')).toBe('true')
+    expect(radios.at(1).attributes('aria-checked')).toBe('false')
+  })
+})
diff --git a/webapp/components/LayoutToggle/LayoutToggle.vue b/webapp/components/LayoutToggle/LayoutToggle.vue
new file mode 100644
index 000000000..ca4b5fc95
--- /dev/null
+++ b/webapp/components/LayoutToggle/LayoutToggle.vue
@@ -0,0 +1,107 @@
+<template>
+  <client-only>
+    <div
+      class="layout-toggle"
+      :class="{ 'layout-toggle--hidden': isMobile }"
+      role="radiogroup"
+      :aria-label="$t('layout.toggle.label')"
+      @keydown.left.prevent="setLayout(true)"
+      @keydown.right.prevent="setLayout(false)"
+    >
+      <os-button
+        ref="singleBtn"
+        circle
+        size="sm"
+        :appearance="value ? 'filled' : 'ghost'"
+        variant="primary"
+        role="radio"
+        :aria-checked="String(value)"
+        :aria-label="$t('layout.toggle.singleColumn')"
+        :tabindex="value ? '0' : '-1'"
+        @click="setLayout(true)"
+      >
+        <template #icon>
+          <os-icon :icon="icons.list" />
+        </template>
+      </os-button>
+      <os-button
+        ref="multiBtn"
+        circle
+        size="sm"
+        :appearance="!value ? 'filled' : 'ghost'"
+        variant="primary"
+        role="radio"
+        :aria-checked="String(!value)"
+        :aria-label="$t('layout.toggle.multiColumn')"
+        :tabindex="!value ? '0' : '-1'"
+        @click="setLayout(false)"
+      >
+        <template #icon>
+          <os-icon :icon="icons.columns" />
+        </template>
+      </os-button>
+    </div>
+  </client-only>
+</template>
+
+<script>
+import { OsButton, OsIcon } from '@ocelot-social/ui'
+import { iconRegistry } from '~/utils/iconRegistry'
+import mobile from '~/mixins/mobile'
+
+const STORAGE_KEY = 'ocelot-layout-single-column'
+
+export default {
+  components: {
+    OsButton,
+    OsIcon,
+  },
+  mixins: [mobile(639)],
+  props: {
+    value: {
+      type: Boolean,
+      default: false,
+    },
+  },
+  created() {
+    this.icons = iconRegistry
+  },
+  mounted() {
+    try {
+      const stored = localStorage.getItem(STORAGE_KEY)
+      if (stored !== null) {
+        this.$emit('input', stored === 'true')
+      }
+    } catch (e) {
+      // localStorage not available
+    }
+  },
+  methods: {
+    setLayout(val) {
+      try {
+        localStorage.setItem(STORAGE_KEY, String(val))
+      } catch (e) {
+        // localStorage not available
+      }
+      this.$emit('input', val)
+      this.$nextTick(() => {
+        const ref = val ? this.$refs.singleBtn : this.$refs.multiBtn
+        const el = ref?.$el || ref
+        if (el) el.focus()
+      })
+    },
+  },
+}
+</script>
+
+<style lang="scss">
+.layout-toggle {
+  display: inline-flex;
+  gap: 4px;
+  align-items: center;
+}
+
+.layout-toggle--hidden {
+  display: none;
+}
+</style>
diff --git a/webapp/components/MasonryGrid/MasonryGrid.spec.js b/webapp/components/MasonryGrid/MasonryGrid.spec.js
index 22c997d40..3c74e51cc 100644
--- a/webapp/components/MasonryGrid/MasonryGrid.spec.js
+++ b/webapp/components/MasonryGrid/MasonryGrid.spec.js
@@ -35,6 +35,15 @@ describe('MasonryGrid', () => {
     expect(wrapper.element.style.rowGap).toBe('2px')
   })
 
+  it('does not set grid-template-columns by default', () => {
+    expect(wrapper.element.style.gridTemplateColumns).toBe('')
+  })
+
+  it('sets grid-template-columns to 1fr when singleColumn is true', () => {
+    wrapper = mount(MasonryGrid, { localVue, propsData: { singleColumn: true } })
+    expect(wrapper.element.style.gridTemplateColumns).toBe('1fr')
+  })
+
   it('calculates rowSpan for children via batchRecalculate', async () => {
     wrapper = mount(MasonryGrid, {
       localVue,
diff --git a/webapp/components/MasonryGrid/MasonryGrid.vue b/webapp/components/MasonryGrid/MasonryGrid.vue
index a85291aad..67cc535be 100644
--- a/webapp/components/MasonryGrid/MasonryGrid.vue
+++ b/webapp/components/MasonryGrid/MasonryGrid.vue
@@ -1,9 +1,5 @@
 <template>
-  <div
-    class="ds-grid"
-    :style="{ gridAutoRows: '2px', rowGap: '2px' }"
-    :class="[measuring ? 'reset-grid-height' : '']"
-  >
+  <div class="ds-grid" :style="gridStyle" :class="[measuring ? 'reset-grid-height' : '']">
     <slot></slot>
   </div>
 </template>
@@ -13,12 +9,32 @@ const ROW_HEIGHT = 2
 const ROW_GAP = 2
 
 export default {
+  props: {
+    singleColumn: {
+      type: Boolean,
+      default: false,
+    },
+  },
   data() {
     return {
       measuring: false,
       childCount: 0,
     }
   },
+  computed: {
+    gridStyle() {
+      return {
+        gridAutoRows: `${ROW_HEIGHT}px`,
+        rowGap: `${ROW_GAP}px`,
+        ...(this.singleColumn ? { gridTemplateColumns: '1fr' } : {}),
+      }
+    },
+  },
+  watch: {
+    singleColumn() {
+      this.$nextTick(() => this.batchRecalculate())
+    },
+  },
   mounted() {
     this.$nextTick(() => this.batchRecalculate())
     this._resizeTimer = null
@@ -76,10 +92,16 @@ export default {
 .ds-grid {
   grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
   column-gap: 16px;
+  min-width: 0;
+  max-width: 100%;
 
   @media (max-width: 810px) {
     column-gap: 8px;
   }
+
+  > * {
+    min-width: 0;
+  }
 }
 
 .reset-grid-height {
diff --git a/webapp/components/ProgressBar/ProgressBar.vue b/webapp/components/ProgressBar/ProgressBar.vue
index 25c9a5a0a..73dfd70af 100644
--- a/webapp/components/ProgressBar/ProgressBar.vue
+++ b/webapp/components/ProgressBar/ProgressBar.vue
@@ -117,9 +117,15 @@ export default {
 .progress-bar-button {
   position: relative;
   margin-left: $space-x-small;
+}
 
-  @media (max-width: 810px) {
+@media (max-width: 639px) {
+  .progress-bar {
     display: none;
   }
+
+  .progress-bar-button {
+    margin-left: 0;
+  }
 }
 </style>
diff --git a/webapp/constants/filter.js b/webapp/constants/filter.js
index 00332053b..b629dc300 100644
--- a/webapp/constants/filter.js
+++ b/webapp/constants/filter.js
@@ -1,2 +1,2 @@
-export const SHOW_CONTENT_FILTER_HEADER_MENU = false
-export const SHOW_CONTENT_FILTER_MASONRY_GRID = true
+export const SHOW_CONTENT_FILTER_HEADER_MENU = true
+export const SHOW_CONTENT_FILTER_MASONRY_GRID = false
diff --git a/webapp/locales/de.json b/webapp/locales/de.json
index 871b44f1f..a3724800c 100644
--- a/webapp/locales/de.json
+++ b/webapp/locales/de.json
@@ -698,6 +698,13 @@
     "redeemed-count": "{count} mal eingelöst",
     "redeemed-count-0": "Noch von niemandem eingelöst"
   },
+  "layout": {
+    "toggle": {
+      "label": "Layout",
+      "multiColumn": "Mehrspaltig",
+      "singleColumn": "Einspaltig"
+    }
+  },
   "localeSwitch": {
     "tooltip": "Sprache wählen"
   },
diff --git a/webapp/locales/en.json b/webapp/locales/en.json
index cf13bc4ee..a535ad4a8 100644
--- a/webapp/locales/en.json
+++ b/webapp/locales/en.json
@@ -698,6 +698,13 @@
     "redeemed-count": "This code has been used {count} times.",
     "redeemed-count-0": "No one has used this code yet."
   },
+  "layout": {
+    "toggle": {
+      "label": "Layout",
+      "multiColumn": "Multi-column",
+      "singleColumn": "Single column"
+    }
+  },
   "localeSwitch": {
     "tooltip": "Choose language"
   },
diff --git a/webapp/locales/es.json b/webapp/locales/es.json
index a80d3c95f..462b858a8 100644
--- a/webapp/locales/es.json
+++ b/webapp/locales/es.json
@@ -698,6 +698,13 @@
     "redeemed-count": null,
     "redeemed-count-0": null
   },
+  "layout": {
+    "toggle": {
+      "label": "Diseño",
+      "multiColumn": "Varias columnas",
+      "singleColumn": "Una columna"
+    }
+  },
   "localeSwitch": {
     "tooltip": null
   },
diff --git a/webapp/locales/fr.json b/webapp/locales/fr.json
index ae61ea920..6423811aa 100644
--- a/webapp/locales/fr.json
+++ b/webapp/locales/fr.json
@@ -698,6 +698,13 @@
     "redeemed-count": null,
     "redeemed-count-0": null
   },
+  "layout": {
+    "toggle": {
+      "label": "Mise en page",
+      "multiColumn": "Plusieurs colonnes",
+      "singleColumn": "Une colonne"
+    }
+  },
   "localeSwitch": {
     "tooltip": null
   },
diff --git a/webapp/locales/it.json b/webapp/locales/it.json
index 4b94aa09e..88dcec9da 100644
--- a/webapp/locales/it.json
+++ b/webapp/locales/it.json
@@ -698,6 +698,13 @@
     "redeemed-count": null,
     "redeemed-count-0": null
   },
+  "layout": {
+    "toggle": {
+      "label": "Layout",
+      "multiColumn": "Più colonne",
+      "singleColumn": "Colonna singola"
+    }
+  },
   "localeSwitch": {
     "tooltip": null
   },
diff --git a/webapp/locales/nl.json b/webapp/locales/nl.json
index ff3543cc7..5c9a26dea 100644
--- a/webapp/locales/nl.json
+++ b/webapp/locales/nl.json
@@ -698,6 +698,13 @@
     "redeemed-count": null,
     "redeemed-count-0": null
   },
+  "layout": {
+    "toggle": {
+      "label": "Weergave",
+      "multiColumn": "Meerdere kolommen",
+      "singleColumn": "Eén kolom"
+    }
+  },
   "localeSwitch": {
     "tooltip": null
   },
diff --git a/webapp/locales/pl.json b/webapp/locales/pl.json
index 48b7e6be4..142cea180 100644
--- a/webapp/locales/pl.json
+++ b/webapp/locales/pl.json
@@ -698,6 +698,13 @@
     "redeemed-count": null,
     "redeemed-count-0": null
   },
+  "layout": {
+    "toggle": {
+      "label": "Układ",
+      "multiColumn": "Wiele kolumn",
+      "singleColumn": "Jedna kolumna"
+    }
+  },
   "localeSwitch": {
     "tooltip": null
   },
diff --git a/webapp/locales/pt.json b/webapp/locales/pt.json
index 1cf487d21..754760c1b 100644
--- a/webapp/locales/pt.json
+++ b/webapp/locales/pt.json
@@ -698,6 +698,13 @@
     "redeemed-count": null,
     "redeemed-count-0": null
   },
+  "layout": {
+    "toggle": {
+      "label": "Layout",
+      "multiColumn": "Várias colunas",
+      "singleColumn": "Coluna única"
+    }
+  },
   "localeSwitch": {
     "tooltip": null
   },
diff --git a/webapp/locales/ru.json b/webapp/locales/ru.json
index 58ca74134..989658f09 100644
--- a/webapp/locales/ru.json
+++ b/webapp/locales/ru.json
@@ -698,6 +698,13 @@
     "redeemed-count": null,
     "redeemed-count-0": null
   },
+  "layout": {
+    "toggle": {
+      "label": "Макет",
+      "multiColumn": "Несколько колонок",
+      "singleColumn": "Одна колонка"
+    }
+  },
   "localeSwitch": {
     "tooltip": null
   },
diff --git a/webapp/pages/index.vue b/webapp/pages/index.vue
index 058e5d2aa..26d3a4aea 100644
--- a/webapp/pages/index.vue
+++ b/webapp/pages/index.vue
@@ -17,6 +17,7 @@
           "
           variant="primary"
           appearance="filled"
+          size="sm"
           @click="showFilter = !showFilter"
         >
           <template #suffix>
@@ -64,12 +65,20 @@
           :titleRemove="$t('filter-menu.deleteFilter')"
           :clickRemove="resetByGroups"
         />
+        <div v-if="showDonations" class="donation-mobile-only">
+          <donation-info :goal="goal" :progress="progress" />
+        </div>
+        <layout-toggle v-model="singleColumn" />
         <div id="my-filter" v-if="showFilter">
           <div @mouseleave="mouseLeaveFilterMenu">
             <filter-menu-component @showFilterMenu="showFilterMenu" />
           </div>
         </div>
       </div>
+      <layout-toggle v-if="!SHOW_CONTENT_FILTER_MASONRY_GRID" v-model="singleColumn" />
+      <div v-if="showDonations && !SHOW_CONTENT_FILTER_MASONRY_GRID" class="donation-mobile-only">
+        <donation-info :goal="goal" :progress="progress" />
+      </div>
       <client-only>
         <os-button
           as="nuxt-link"
@@ -99,15 +108,16 @@
       <div v-if="hashtag">
         <hashtags-filter :hashtag="hashtag" @clearSearch="clearSearch" />
       </div>
-      <div v-if="showDonations" class="top-info-bar">
+      <div v-if="showDonations" class="top-info-bar donation-desktop-only">
         <donation-info :goal="goal" :progress="progress" />
       </div>
     </div>
     <!-- content grid -->
     <masonry-grid
+      :single-column="singleColumn"
       :class="[
         !hashtag && !showDonations ? 'grid-margin-top' : '',
-        !isMobile && posts.length <= 2 ? 'grid-column-helper' : '',
+        !isMobile && !singleColumn && posts.length <= 2 ? 'grid-column-helper' : '',
       ]"
     >
       <!-- skeleton placeholders while loading -->
@@ -170,6 +180,7 @@ import PostTeaserSkeleton from '~/components/PostTeaser/PostTeaserSkeleton.vue'
 import MasonryGrid from '~/components/MasonryGrid/MasonryGrid.vue'
 import MasonryGridItem from '~/components/MasonryGrid/MasonryGridItem.vue'
 import HeaderButton from '~/components/FilterMenu/HeaderButton'
+import LayoutToggle from '~/components/LayoutToggle/LayoutToggle'
 import { mapGetters, mapMutations } from 'vuex'
 import { DonationsQuery } from '~/graphql/Donations'
 import { filterPosts } from '~/graphql/PostQuery.js'
@@ -192,6 +203,7 @@ export default {
     MasonryGridItem,
     FilterMenuComponent,
     HeaderButton,
+    LayoutToggle,
   },
   mixins: [postListActions, mobile(), GetCategories],
   data() {
@@ -211,6 +223,7 @@ export default {
       pageSize: 12,
       hashtag,
       SHOW_CONTENT_FILTER_MASONRY_GRID,
+      singleColumn: false,
     }
   },
   computed: {
@@ -249,6 +262,14 @@ export default {
     this.icons = iconRegistry
   },
   mounted() {
+    try {
+      const stored = localStorage.getItem('ocelot-layout-single-column')
+      if (stored !== null) {
+        this.singleColumn = stored === 'true'
+      }
+    } catch (e) {
+      // localStorage not available
+    }
     if (this.categoryId) {
       this.resetCategories()
       this.toggleCategory(this.categoryId)
@@ -370,9 +391,9 @@ export default {
 
 .feed-top-row {
   display: flex;
-  align-items: flex-start;
+  align-items: center;
   gap: 16px;
-  margin-top: 0px;
+  margin-top: -8px;
 }
 
 .filterButtonMenu {
@@ -392,8 +413,8 @@ export default {
   box-shadow: $box-shadow-x-large !important;
   z-index: $z-index-sticky-float !important;
   position: fixed !important;
-  right: max(20px, calc((100vw - $container-max-width-x-large) / 2 + 48px)) !important;
-  top: 81px !important;
+  right: max(20px, calc((100vw - $container-max-width-x-large) / 2 + 52px)) !important;
+  top: 88px !important;
   transition: top 0.3s ease !important;
 }
 
@@ -406,15 +427,14 @@ export default {
   align-items: center;
 }
 .newsfeed-controls {
-  margin-top: 8px;
+  margin-top: 0;
 
-  &.newsfeed-controls--no-filter {
-    margin-top: -16px;
-    margin-bottom: 16px;
+  .donation-info {
+    margin-top: 4px;
+  }
 
-    .top-info-bar {
-      padding-right: 70px;
-    }
+  .top-info-bar {
+    padding-right: 70px;
   }
 }
 .main-container .grid-column-helper {
@@ -431,7 +451,7 @@ export default {
   z-index: $z-index-page-submenu;
 }
 .grid-margin-top {
-  margin-top: 8px;
+  margin-top: 4px;
 }
 @media screen and (min-height: 401px) {
   #my-filter {
@@ -473,7 +493,31 @@ export default {
     padding-bottom: 80px;
   }
 }
-@media screen and (max-width: 650px) {
+.donation-mobile-only {
+  display: none;
+
+  .donation-info {
+    margin: 0;
+  }
+
+  .progress-bar-component {
+    top: 0;
+  }
+}
+
+@media (max-width: 639px) {
+  .donation-mobile-only {
+    display: block;
+  }
+
+  .donation-desktop-only {
+    display: none;
+  }
+
+  .post-add-button {
+    top: 67px !important;
+  }
+
   .newsfeed-controls {
     margin-top: 8px;
   }