diff --git a/src/features/run/ConfigForm.tsx b/src/features/run/ConfigForm.tsx
index 3c5e8d30a..f7ecf0fe7 100644
--- a/src/features/run/ConfigForm.tsx
+++ b/src/features/run/ConfigForm.tsx
@@ -6,8 +6,10 @@
 import { parseJavaArgs } from "@/platform/javaLaunch";
 import { useMemo, useRef, useState, type KeyboardEvent, type ReactNode, type RefObject } from "react";
 import clsx from "clsx";
-import type { BeforeLaunchTask, RunConfig } from "@/platform/ipc";
+import { isTauri, type BeforeLaunchTask, type RunConfig } from "@/platform/ipc";
 import { useWorkflowSettings } from "@/platform/workflowSettings";
+import { relativePath, useProject } from "@/platform/project";
+import { isRemoteWindow } from "@/platform/remote";
 import { useTx, useTxTemplate } from "@/platform/i18n";
 import {
   Button,
@@ -169,6 +171,14 @@ export interface ConfigFormProps {
   modifyRequest: number;
 }
 
+/** Picks `.env` files; paths inside the project are returned relative to its root. */
+async function chooseEnvFiles(root: string | null, title: string): Promise<string[]> {
+  const { open } = await import("@tauri-apps/plugin-dialog");
+  const picked = await open({ multiple: true, title, defaultPath: root ?? undefined });
+  const paths = picked === null ? [] : Array.isArray(picked) ? picked : [picked];
+  return paths.map((p) => (root ? relativePath(root, p) : p));
+}
+
 export function ConfigForm({ config, all, type, errors, template, onChange, modifyRequest }: ConfigFormProps) {
   const openByDefault = useWorkflowSettings((s) => s.run.showOnStart);
   const externalTools = useWorkflowSettings((s) => s.externalTools);
@@ -176,6 +186,7 @@ export function ConfigForm({ config, all, type, errors, template, onChange, modi
   const toolWindows = useContributions((s) => s.toolWindows);
   const tx = useTx();
   const txTemplate = useTxTemplate();
+  const root = useProject((s) => s.project?.root ?? null);
   const [shown, setShown] = useState<ReadonlySet<OptionId>>(() => new Set());
   const [argsText, setArgsText] = useState<string | null>(null);
   const [envText, setEnvText] = useState<string | null>(null);
@@ -480,6 +491,21 @@ export function ConfigForm({ config, all, type, errors, template, onChange, modi
                 title="Edit Environment Variables"
                 onClick={() => setEnvOpen(true)}
               />
+              {isTauri() && !isRemoteWindow() && (
+                <IconButton
+                  icon="folder-open"
+                  size="small"
+                  iconSize={14}
+                  title="Browse for .env Files"
+                  onClick={() =>
+                    void chooseEnvFiles(root, tx("Browse for .env Files")).then((files) => {
+                      const current = config.envFiles ?? [];
+                      const added = files.filter((f) => !current.includes(f));
+                      if (added.length) update({ envFiles: [...current, ...added] });
+                    })
+                  }
+                />
+              )}
             </div>
             {config.includeSystemEnv === false && (
               <span className={styles.chooserMuted}>
diff --git a/src/features/run/envFiles.test.tsx b/src/features/run/envFiles.test.tsx
new file mode 100644
index 000000000..45a47e7c1
--- /dev/null
+++ b/src/features/run/envFiles.test.tsx
@@ -0,0 +1,45 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { cleanup, fireEvent, render, screen, waitFor } from "@testing-library/react";
+
+const open = vi.hoisted(() => vi.fn());
+vi.mock("@tauri-apps/plugin-dialog", () => ({ open }));
+vi.mock("@/platform/ipc", async (importOriginal) => ({
+  ...(await importOriginal<typeof import("@/platform/ipc")>()),
+  isTauri: () => true,
+}));
+
+import type { RunConfig } from "@/platform/ipc";
+import { useProject } from "@/platform/project";
+import { ConfigForm } from "./ConfigForm";
+
+const config: RunConfig = {
+  id: "app",
+  name: "app",
+  kind: "shell",
+  command: "python3",
+  args: [],
+  cwd: null,
+  env: {},
+  detected: false,
+  isTest: false,
+  debugAdapter: null,
+  envFiles: [".env"],
+};
+
+afterEach(cleanup);
+
+describe("Environment variables", () => {
+  it("adds the .env files chosen in the file dialog, relative to the project root", async () => {
+    useProject.setState({ project: { root: "/work/app" } as never });
+    open.mockResolvedValue(["/work/app/.env", "/work/app/config/dev.env", "/elsewhere/shared.env"]);
+    const onChange = vi.fn();
+    render(<ConfigForm config={config} all={[]} type={undefined} errors={{}} onChange={onChange} modifyRequest={0} />);
+    fireEvent.click(screen.getByRole("button", { name: "Browse for .env Files" }));
+    await waitFor(() =>
+      expect(onChange).toHaveBeenCalledWith(
+        expect.objectContaining({ envFiles: [".env", "config/dev.env", "/elsewhere/shared.env"] }),
+      ),
+    );
+    expect(open).toHaveBeenCalledWith(expect.objectContaining({ multiple: true, defaultPath: "/work/app" }));
+  });
+});
diff --git a/src/platform/locales/text/zh.json b/src/platform/locales/text/zh.json
index 5e221b6e9..837a4513a 100644
--- a/src/platform/locales/text/zh.json
+++ b/src/platform/locales/text/zh.json
@@ -2935,6 +2935,7 @@
   "Modify options": "修改选项",
   "e.g. ./gradlew or cargo": "例如 ./gradlew 或 cargo",
   "Edit Environment Variables": "编辑环境变量",
+  "Browse for .env Files": "浏览 .env 文件",
   "System environment variables are not passed": "不传递系统环境变量",
   "Redirect input from": "重定向输入自",
   "File relative to the project root": "相对于项目根目录的文件",