diff --git a/list.schema.json b/list.schema.json
new file mode 100644
index 0000000..4532483
--- /dev/null
+++ b/list.schema.json
@@ -0,0 +1,85 @@
+{
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "$id": "https://c0ntroller.de/content/list.schema.json",
+    "title": "Content List",
+    "description": "A list of projects and diaries for my homepage.",
+    "type": "array",
+    "items": {
+        "anyOf": [
+            { "$ref": "#/$defs/project" },
+            { "$ref": "#/$defs/diary" }
+        ]
+    },
+    "$defs": {
+        "content": {
+            "type": "object",
+            "properties": {
+                "type": {
+                    "type": "string",
+                    "enum": ["project", "diary"]
+                },
+                "name": {
+                    "type": "string",
+                    "pattern": "^[a-z0-9-_]+$"
+                },
+                "short_desc": {
+                    "type": "string",
+                    "maxLength": 100
+                },
+                "desc": {
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
+                },
+                "more": {
+                    "type": "string",
+                    "format": "uri"
+                },
+                "repo": {
+                    "type": "string",
+                    "format": "uri"
+                }
+            },
+            "required": ["type", "name", "short_desc", "desc"]
+        },
+        "project": {
+            "type": "object",
+            "allOf": [
+                { "$ref": "#/$defs/content" }
+            ],
+            "properties": {
+                "type": {
+                    "const": "project"
+                }
+            }
+        },
+        "diary": {
+            "type": "object",
+            "allOf": [
+                { "$ref": "#/$defs/content" }
+            ],
+            "properties": {
+                "type": {
+                    "const": "diary"
+                },
+                "entries": {
+                    "type": "array",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "title": {
+                                "type": "string"
+                            },
+                            "filename": {
+                                "type": "string"
+                            }
+                        },
+                        "required": ["title", "filename"]
+                    }
+                }
+            },
+            "required": ["entries"]
+        }
+    }
+  }
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