diff --git a/json/.envrc b/json/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/json/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/json/flake.nix b/json/flake.nix
new file mode 100644
index 0000000..9ddfe8d
--- /dev/null
+++ b/json/flake.nix
@@ -0,0 +1,33 @@
+{
+  description = "JSON dev environment";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+  outputs = { self, nixpkgs }:
+    let
+      systems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f {
+        pkgs = import nixpkgs { inherit system; };
+      });
+    in
+    {
+      devShells = forAllSystems ({ pkgs }: {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            jq
+            fx
+            nodePackages.jsonlint
+          ];
+        };
+      });
+
+      apps = forAllSystems ({ pkgs }: {
+        default = {
+          type = "app";
+          program = toString (pkgs.writeShellScript "validate-json" ''
+            ${pkgs.jq}/bin/jq '.' ${./hello.json}
+          '');
+        };
+      });
+    };
+}
diff --git a/json/hello.json b/json/hello.json
new file mode 100644
index 0000000..1bcadb6
--- /dev/null
+++ b/json/hello.json
@@ -0,0 +1,9 @@
+{
+  "greeting": "Hello, World!",
+  "language": "JSON",
+  "features": ["simple", "structured", "widely-used"],
+  "metadata": {
+    "version": 1,
+    "example": true
+  }
+}