diff --git a/app/assets/stylesheets/components/settings.css b/app/assets/stylesheets/components/settings.css
index 100cbdf..90e2d1f 100644
--- a/app/assets/stylesheets/components/settings.css
+++ b/app/assets/stylesheets/components/settings.css
@@ -124,7 +124,8 @@
   border-color: var(--color-border);
 }
 
-.theme-choice {
+.theme-choice,
+.density-choice {
   display: flex;
   align-items: center;
   justify-content: space-between;
@@ -135,18 +136,21 @@
   border: var(--border-width) solid var(--color-border);
 }
 
-.theme-choice-label {
+.theme-choice-label,
+.density-choice-label {
   font-weight: var(--font-weight-medium);
   color: var(--color-text-primary);
 }
 
-.theme-choice-buttons {
+.theme-choice-buttons,
+.density-choice-buttons {
   display: inline-flex;
   align-items: center;
   gap: var(--spacing-2);
 }
 
-.theme-choice-button {
+.theme-choice-button,
+.density-choice-button {
   display: inline-flex;
   align-items: center;
   gap: var(--spacing-2);
@@ -159,19 +163,22 @@
   transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
 }
 
-.theme-choice-button:hover {
+.theme-choice-button:hover,
+.density-choice-button:hover {
   background: var(--color-bg-hover);
   box-shadow: var(--shadow-sm);
   transform: translateY(-1px);
 }
 
-.theme-choice-button.is-active {
+.theme-choice-button.is-active,
+.density-choice-button.is-active {
   background: var(--color-bg-button);
   color: var(--color-text-button);
   border-color: transparent;
 }
 
-.theme-choice-button.is-active i {
+.theme-choice-button.is-active i,
+.density-choice-button.is-active i {
   color: currentColor;
 }
 
diff --git a/app/assets/stylesheets/variables.css b/app/assets/stylesheets/variables.css
index 1079de0..d9e150d 100644
--- a/app/assets/stylesheets/variables.css
+++ b/app/assets/stylesheets/variables.css
@@ -60,3 +60,69 @@
   --avatar-size-md: 32px;
   --avatar-size-default: 40px;
 }
+
+:root[data-density="tiny"] {
+  --font-size-xs:   0.625rem;
+  --font-size-sm:   0.675rem;
+  --font-size-base: 0.725rem;
+  --font-size-md:   0.775rem;
+  --font-size-lg:   0.825rem;
+
+  --spacing-2: 0.25rem;
+  --spacing-3: 0.375rem;
+  --spacing-4: 0.625rem;
+  --spacing-5: 0.75rem;
+  --spacing-6: 1rem;
+
+  --line-height-normal:  1.4;
+  --line-height-relaxed: 1.45;
+}
+
+:root[data-density="compact"] {
+  --font-size-xs:   0.70rem;
+  --font-size-sm:   0.75rem;
+  --font-size-base: 0.80rem;
+  --font-size-md:   0.875rem;
+  --font-size-lg:   0.90rem;
+
+  --spacing-2: 0.375rem;
+  --spacing-3: 0.5rem;
+  --spacing-4: 0.75rem;
+  --spacing-5: 1rem;
+  --spacing-6: 1.25rem;
+
+  --line-height-normal:  1.5;
+  --line-height-relaxed: 1.55;
+}
+
+:root[data-density="comfortable"] {
+  --font-size-xs:   0.875rem;
+  --font-size-sm:   0.95rem;
+  --font-size-base: 1rem;
+  --font-size-md:   1.1rem;
+  --font-size-lg:   1.15rem;
+
+  --spacing-3: 0.875rem;
+  --spacing-4: 1.25rem;
+  --spacing-5: 1.5rem;
+  --spacing-6: 1.75rem;
+
+  --line-height-normal:  1.65;
+  --line-height-relaxed: 1.80;
+}
+
+:root[data-density="spacious"] {
+  --font-size-xs:   0.95rem;
+  --font-size-sm:   1.05rem;
+  --font-size-base: 1.1rem;
+  --font-size-md:   1.2rem;
+  --font-size-lg:   1.25rem;
+
+  --spacing-3: 1rem;
+  --spacing-4: 1.5rem;
+  --spacing-5: 1.75rem;
+  --spacing-6: 2rem;
+
+  --line-height-normal:  1.70;
+  --line-height-relaxed: 1.85;
+}
diff --git a/app/javascript/controllers/density_controller.js b/app/javascript/controllers/density_controller.js
new file mode 100644
index 0000000..bdc4b42
--- /dev/null
+++ b/app/javascript/controllers/density_controller.js
@@ -0,0 +1,48 @@
+import { Controller } from "@hotwired/stimulus"
+
+const STORAGE_KEY = "hackorum-density"
+const DEFAULT_DENSITY = "default"
+const VALID_DENSITIES = ["tiny", "compact", "default", "comfortable", "spacious"]
+
+export default class extends Controller {
+  static targets = ["button"]
+
+  connect() {
+    this.applyInitialDensity()
+  }
+
+  select(event) {
+    event.preventDefault()
+    const { densityValue } = event.currentTarget.dataset
+    this.setDensity(densityValue)
+  }
+
+  applyInitialDensity() {
+    const stored = window.localStorage.getItem(STORAGE_KEY)
+    const initial = VALID_DENSITIES.includes(stored) ? stored : DEFAULT_DENSITY
+    this.setDensity(initial, { persist: false })
+  }
+
+  setDensity(density, { persist = true } = {}) {
+    const normalized = VALID_DENSITIES.includes(density) ? density : DEFAULT_DENSITY
+    document.documentElement.dataset.density = normalized
+
+    if (persist) {
+      window.localStorage.setItem(STORAGE_KEY, normalized)
+    }
+
+    this.updateButtons(normalized)
+  }
+
+  updateButtons(density) {
+    if (this.hasButtonTarget) {
+      this.buttonTargets.forEach((button) => {
+        button.classList.toggle("is-active", button.dataset.densityValue === density)
+      })
+    }
+  }
+
+  get currentDensity() {
+    return document.documentElement.dataset.density || DEFAULT_DENSITY
+  }
+}
diff --git a/app/views/layouts/application.html.slim b/app/views/layouts/application.html.slim
index 4103b92..e0ca9fa 100644
--- a/app/views/layouts/application.html.slim
+++ b/app/views/layouts/application.html.slim
@@ -1,5 +1,5 @@
 doctype html
-html data-theme="light"
+html data-theme="light" data-density="default"
   head
     title = meta_title
     meta[name="description" content=meta_description]
@@ -30,6 +30,10 @@ html data-theme="light"
           var prefersDark = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;
           var theme = stored || (prefersDark ? 'dark' : 'light');
           document.documentElement.dataset.theme = theme;
+          var densityKey = 'hackorum-density';
+          var validDensities = ['tiny', 'compact', 'default', 'comfortable', 'spacious'];
+          var storedDensity = window.localStorage.getItem(densityKey);
+          document.documentElement.dataset.density = validDensities.includes(storedDensity) ? storedDensity : 'default';
         })();
     = stylesheet_link_tag "application", "data-turbo-track": "reload"
     = javascript_importmap_tags
@@ -37,7 +41,7 @@ html data-theme="light"
     - if ENV["UMAMI_WEBSITE_ID"].present?
       - umami_host = ENV["UMAMI_HOST"].presence || "https://umami.hackorum.dev"
       script[async defer data-website-id=ENV["UMAMI_WEBSITE_ID"] src="#{umami_host}/script.js"]
-  body class=(content_for?(:sidebar) ? "has-sidebar" : nil) data-controller="sidebar swipe-nav"
+  body class=(content_for?(:sidebar) ? "has-sidebar" : nil) data-controller="sidebar swipe-nav density"
     - if user_signed_in? && current_user.username.blank?
       .global-warning
         span Please set a username in Settings.
diff --git a/app/views/settings/profiles/show.html.slim b/app/views/settings/profiles/show.html.slim
index d8a2249..1dc9767 100644
--- a/app/views/settings/profiles/show.html.slim
+++ b/app/views/settings/profiles/show.html.slim
@@ -24,6 +24,23 @@
           i.fa-regular.fa-moon aria-hidden="true"
           span Dark
 
+  .settings-section
+    h2 Text Density
+    p.settings-hint Choose your preferred text size and spacing.
+    .density-choice data-controller="density"
+      span.density-choice-label Density
+      .density-choice-buttons
+        button.density-choice-button type="button" data-density-value="tiny" data-density-target="button" data-action="click->density#select"
+          span Tiny
+        button.density-choice-button type="button" data-density-value="compact" data-density-target="button" data-action="click->density#select"
+          span Compact
+        button.density-choice-button type="button" data-density-value="default" data-density-target="button" data-action="click->density#select"
+          span Default
+        button.density-choice-button type="button" data-density-value="comfortable" data-density-target="button" data-action="click->density#select"
+          span Comfortable
+        button.density-choice-button type="button" data-density-value="spacious" data-density-target="button" data-action="click->density#select"
+          span Spacious
+
   .settings-section
     h2 Mention Settings
     p.settings-hint Control who can @mention you in notes.