diff --git a/internal/topdata/convert.go b/internal/topdata/convert.go
index d3bca09..502a20c 100644
--- a/internal/topdata/convert.go
+++ b/internal/topdata/convert.go
@@ -215,6 +215,16 @@ func parseConvertArgs(args []string, allowFormat bool) (convertOptions, string,
 		}
 		return opts, positional[0], output, nil
 	}
+	ctx, err := resolveConvertContext(positional[0])
+	if err != nil {
+		return opts, "", "", err
+	}
+	if strings.TrimSpace(opts.Namespace) == "" {
+		opts.Namespace = ctx.Template.Namespace
+	}
+	if len(opts.KeyFields) == 0 && len(ctx.Template.KeyFields) > 0 {
+		opts.KeyFields = append(opts.KeyFields, ctx.Template.KeyFields...)
+	}
 	return opts, positional[0], positional[1], nil
 }
 
diff --git a/internal/topdata/convert_test.go b/internal/topdata/convert_test.go
index a0fcb60..d85a864 100644
--- a/internal/topdata/convert_test.go
+++ b/internal/topdata/convert_test.go
@@ -2,6 +2,7 @@ package topdata
 
 import (
 	"bytes"
+	"encoding/json"
 	"os"
 	"path/filepath"
 	"strings"
@@ -61,6 +62,63 @@ func TestRunConvertCommandInfersTemplateNamespaceAndOutput(t *testing.T) {
 	}
 }
 
+func TestRunConvertCommand2DAToJSONInfersTemplateKeys(t *testing.T) {
+	root := testProjectRoot(t)
+	writeFile(t, filepath.Join(root, "nwn-tool.json"), `{
+  "module": {"name": "Test", "resref": "test"},
+  "paths": {"source": "src", "assets": "assets", "build": "build"},
+  "topdata": {"source": "topdata", "build": "build/topdata"}
+}`+"\n")
+	mkdirAll(t, filepath.Join(root, "topdata", "templates"))
+	writeFile(t, filepath.Join(root, "topdata", "templates", "config.json"), `{
+  "tables": {
+    "template_appearance": {
+      "namespace": "appearance",
+      "key_fields": ["LABEL"]
+    }
+  }
+}`+"\n")
+	inputPath := filepath.Join(root, "topdata", "templates", "template_appearance.2da")
+	writeFile(t, inputPath, "2DA V2.0\n\nLABEL STRING_REF NAME\n960 \"Zombie, Ash, Hot\" **** Zombie_Ash_Hot\n961 \"Zombie, Ash, Done\" **** Zombie_Ash_Done\n")
+
+	oldCwd, err := os.Getwd()
+	if err != nil {
+		t.Fatalf("getwd: %v", err)
+	}
+	t.Cleanup(func() {
+		_ = os.Chdir(oldCwd)
+	})
+	if err := os.Chdir(root); err != nil {
+		t.Fatalf("chdir: %v", err)
+	}
+
+	outputPath := filepath.Join(root, "out", "appearance.json")
+	if err := RunConvertCommand([]string{
+		"2da-to-json",
+		"topdata/templates/template_appearance.2da",
+		outputPath,
+	}, &bytes.Buffer{}); err != nil {
+		t.Fatalf("RunConvertCommand failed: %v", err)
+	}
+
+	raw, err := os.ReadFile(outputPath)
+	if err != nil {
+		t.Fatalf("read output: %v", err)
+	}
+	var payload struct {
+		Rows []map[string]any `json:"rows"`
+	}
+	if err := json.Unmarshal(raw, &payload); err != nil {
+		t.Fatalf("unmarshal output: %v", err)
+	}
+	if got := payload.Rows[0]["key"]; got != "appearance:zombie_ash_hot" {
+		t.Fatalf("expected first key to be inferred from template config, got %#v", got)
+	}
+	if got := payload.Rows[1]["key"]; got != "appearance:zombie_ash_done" {
+		t.Fatalf("expected second key to be inferred from template config, got %#v", got)
+	}
+}
+
 func TestRunConvertCommandFailsOnUnkeyedRows(t *testing.T) {
 	root := testProjectRoot(t)
 	writeFile(t, filepath.Join(root, "nwn-tool.json"), `{