diff --git a/Userland/Libraries/LibWeb/CSS/ComputedValues.h b/Userland/Libraries/LibWeb/CSS/ComputedValues.h
index 2d22d5ec62..4bb0bdd27d 100644
--- a/Userland/Libraries/LibWeb/CSS/ComputedValues.h
+++ b/Userland/Libraries/LibWeb/CSS/ComputedValues.h
@@ -66,6 +66,7 @@ public:
     static CSS::FlexBasis flex_basis() { return CSS::Size::make_auto(); }
     static CSS::ImageRendering image_rendering() { return CSS::ImageRendering::Auto; }
     static CSS::JustifyContent justify_content() { return CSS::JustifyContent::FlexStart; }
+    static CSS::JustifySelf justify_self() { return CSS::JustifySelf::Auto; }
     static CSS::AlignContent align_content() { return CSS::AlignContent::Stretch; }
     static CSS::AlignItems align_items() { return CSS::AlignItems::Stretch; }
     static CSS::AlignSelf align_self() { return CSS::AlignSelf::Auto; }
@@ -253,6 +254,7 @@ public:
     CSS::Visibility visibility() const { return m_inherited.visibility; }
     CSS::ImageRendering image_rendering() const { return m_inherited.image_rendering; }
     CSS::JustifyContent justify_content() const { return m_noninherited.justify_content; }
+    CSS::JustifySelf justify_self() const { return m_noninherited.justify_self; }
     CSS::BackdropFilter const& backdrop_filter() const { return m_noninherited.backdrop_filter; }
     Vector<ShadowData> const& box_shadow() const { return m_noninherited.box_shadow; }
     CSS::BoxSizing box_sizing() const { return m_noninherited.box_sizing; }
@@ -401,6 +403,7 @@ protected:
         CSS::AlignSelf align_self { InitialValues::align_self() };
         CSS::Appearance appearance { InitialValues::appearance() };
         CSS::JustifyContent justify_content { InitialValues::justify_content() };
+        CSS::JustifySelf justify_self { InitialValues::justify_self() };
         CSS::Overflow overflow_x { InitialValues::overflow() };
         CSS::Overflow overflow_y { InitialValues::overflow() };
         float opacity { InitialValues::opacity() };
@@ -502,6 +505,7 @@ public:
     void set_appearance(CSS::Appearance value) { m_noninherited.appearance = value; }
     void set_opacity(float value) { m_noninherited.opacity = value; }
     void set_justify_content(CSS::JustifyContent value) { m_noninherited.justify_content = value; }
+    void set_justify_self(CSS::JustifySelf value) { m_noninherited.justify_self = value; }
     void set_box_shadow(Vector<ShadowData>&& value) { m_noninherited.box_shadow = move(value); }
     void set_transformations(Vector<CSS::Transformation> value) { m_noninherited.transformations = move(value); }
     void set_transform_origin(CSS::TransformOrigin value) { m_noninherited.transform_origin = value; }
diff --git a/Userland/Libraries/LibWeb/CSS/Enums.json b/Userland/Libraries/LibWeb/CSS/Enums.json
index a6a3ab4a28..0b68187988 100644
--- a/Userland/Libraries/LibWeb/CSS/Enums.json
+++ b/Userland/Libraries/LibWeb/CSS/Enums.json
@@ -176,6 +176,21 @@
         "space-around",
         "space-evenly"
     ],
+    "justify-self": [
+        "auto",
+        "baseline",
+        "center",
+        "end",
+        "flex-end",
+        "flex-start",
+        "normal",
+        "safe",
+        "self-end",
+        "self-start",
+        "start",
+        "stretch",
+        "unsafe"
+    ],
     "line-style": [
         "none",
         "hidden",
diff --git a/Userland/Libraries/LibWeb/CSS/Properties.json b/Userland/Libraries/LibWeb/CSS/Properties.json
index 9f3b381e33..0704f7a7cb 100644
--- a/Userland/Libraries/LibWeb/CSS/Properties.json
+++ b/Userland/Libraries/LibWeb/CSS/Properties.json
@@ -1260,6 +1260,13 @@
       "justify-content"
     ]
   },
+  "justify-self": {
+    "inherited": false,
+    "initial": "auto",
+    "valid-types": [
+      "justify-self"
+    ]
+  },
   "left": {
     "inherited": false,
     "initial": "auto",
diff --git a/Userland/Libraries/LibWeb/CSS/ResolvedCSSStyleDeclaration.cpp b/Userland/Libraries/LibWeb/CSS/ResolvedCSSStyleDeclaration.cpp
index e43da914b9..9b6120c638 100644
--- a/Userland/Libraries/LibWeb/CSS/ResolvedCSSStyleDeclaration.cpp
+++ b/Userland/Libraries/LibWeb/CSS/ResolvedCSSStyleDeclaration.cpp
@@ -691,6 +691,8 @@ ErrorOr<RefPtr<StyleValue const>> ResolvedCSSStyleDeclaration::style_value_for_p
         return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().image_rendering()));
     case PropertyID::JustifyContent:
         return IdentifierStyleValue::create(to_value_id(layout_node.computed_values().justify_content()));
+    case PropertyID::JustifySelf:
+        return TRY(IdentifierStyleValue::create(to_value_id(layout_node.computed_values().justify_self())));
     case PropertyID::Left:
         return style_value_for_length_percentage(layout_node.computed_values().inset().left());
     case PropertyID::LineHeight:
diff --git a/Userland/Libraries/LibWeb/CSS/StyleProperties.cpp b/Userland/Libraries/LibWeb/CSS/StyleProperties.cpp
index 5ebf433559..76d6bce17f 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleProperties.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleProperties.cpp
@@ -405,6 +405,12 @@ Optional<CSS::JustifyContent> StyleProperties::justify_content() const
     return value_id_to_justify_content(value->to_identifier());
 }
 
+Optional<CSS::JustifySelf> StyleProperties::justify_self() const
+{
+    auto value = property(CSS::PropertyID::JustifySelf);
+    return value_id_to_justify_self(value->to_identifier());
+}
+
 Vector<CSS::Transformation> StyleProperties::transformations() const
 {
     auto value = property(CSS::PropertyID::Transform);
diff --git a/Userland/Libraries/LibWeb/CSS/StyleProperties.h b/Userland/Libraries/LibWeb/CSS/StyleProperties.h
index 56758da90e..995506f5c5 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleProperties.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleProperties.h
@@ -83,6 +83,7 @@ public:
     Optional<CSS::Visibility> visibility() const;
     Optional<CSS::ImageRendering> image_rendering() const;
     Optional<CSS::JustifyContent> justify_content() const;
+    Optional<CSS::JustifySelf> justify_self() const;
     Optional<CSS::Overflow> overflow_x() const;
     Optional<CSS::Overflow> overflow_y() const;
     Vector<CSS::ShadowData> box_shadow(Layout::Node const&) const;
diff --git a/Userland/Libraries/LibWeb/Layout/Node.cpp b/Userland/Libraries/LibWeb/Layout/Node.cpp
index 5cdc175233..cde45f07c9 100644
--- a/Userland/Libraries/LibWeb/Layout/Node.cpp
+++ b/Userland/Libraries/LibWeb/Layout/Node.cpp
@@ -491,6 +491,10 @@ void NodeWithStyle::apply_style(const CSS::StyleProperties& computed_style)
     if (justify_content.has_value())
         computed_values.set_justify_content(justify_content.value());
 
+    auto justify_self = computed_style.justify_self();
+    if (justify_self.has_value())
+        computed_values.set_justify_self(justify_self.value());
+
     auto accent_color = computed_style.accent_color(*this);
     if (accent_color.has_value())
         computed_values.set_accent_color(accent_color.value());