diff --git a/src/features/settings/__tests__/keymap.test.ts b/src/features/settings/__tests__/keymap.test.ts
index 89d5ff6da..de4c8337f 100644
--- a/src/features/settings/__tests__/keymap.test.ts
+++ b/src/features/settings/__tests__/keymap.test.ts
@@ -36,7 +36,7 @@ import {
   withCustomOverrides,
   type KeymapDraft,
 } from "../keymap/model";
-import { buildKeymapTree, keymapSearchLabels } from "../keymap/KeymapPage";
+import { buildKeymapTree, keymapJson, keymapSearchLabels } from "../keymap/KeymapPage";
 import { groupPath } from "../keymap/groups";
 import { registerEditorActions } from "@/editor/core/actions";
 import { registerLspActions } from "@/editor/lsp/actions";
@@ -59,6 +59,32 @@ it("finds the translated declaration action by 声明 and its English title", as
   }
 });
 
+describe("keymapJson", () => {
+  it("exports the keymap's name, base preset and every bound action", () => {
+    registerEditorActions();
+    const out = JSON.parse(
+      keymapJson("My Keymap", "intellij-macos", allActions(), { preset: "intellij-macos", overrides: {} }),
+    );
+    expect(out.name).toBe("My Keymap");
+    expect(out.basedOn).toBe("intellij-macos");
+    expect(out.actions["code.duplicateLine"]).toEqual(["Meta+D"]);
+    expect(out.actions["navigate.gotoLine"]).toEqual(["Meta+L"]);
+    // Unbound actions are omitted, not exported as empty lists.
+    expect(Object.values(out.actions).every((keys) => Array.isArray(keys) && keys.length > 0)).toBe(true);
+  });
+
+  it("exports overrides over the preset", () => {
+    registerEditorActions();
+    const out = JSON.parse(
+      keymapJson("Custom", "intellij-macos", allActions(), {
+        preset: "intellij-macos",
+        overrides: { "code.duplicateLine": ["Ctrl+T"] },
+      }),
+    );
+    expect(out.actions["code.duplicateLine"]).toEqual(["Ctrl+T"]);
+  });
+});
+
 const key = (
   code: string,
   mods: Partial<Record<"metaKey" | "ctrlKey" | "altKey" | "shiftKey", boolean>> = {},
diff --git a/src/features/settings/keymap/KeymapPage.tsx b/src/features/settings/keymap/KeymapPage.tsx
index 5f915c566..7c31ca179 100644
--- a/src/features/settings/keymap/KeymapPage.tsx
+++ b/src/features/settings/keymap/KeymapPage.tsx
@@ -11,6 +11,7 @@ import clsx from "clsx";
 import { useActions, allActions, type Action } from "@/platform/actions";
 import { defaultPreset, formatBinding, type Keymap, PRESET_TITLES, PRESETS, useKeymap } from "@/platform/keymap";
 import { call, commands } from "@/platform/ipc";
+import { notifications } from "@/workbench/contributions";
 import { ask, confirm, showError } from "@/workbench/messages";
 import {
   HighlightedText,
@@ -73,6 +74,21 @@ export function keymapSearchLabels(): string[] {
 
 const groupKey = (path: readonly string[]) => `grp:${path.join("/")}`;
 
+/**
+ * The JSON written by "Export Keymap as JSON…": the keymap's name, the preset
+ * it is based on, and every configurable action's resolved bindings, so the
+ * mapping can be read or compared to IDEA offline.
+ */
+export function keymapJson(name: string, basedOn: string, actions: readonly Action[], draft: KeymapDraft): string {
+  const bindings: Keymap = {};
+  for (const action of actions) {
+    if (!isKeymapAction(action, draft)) continue;
+    const keys = resolveBindings(draft, action.id);
+    if (keys.length) bindings[action.id] = keys;
+  }
+  return JSON.stringify({ name, basedOn, actions: bindings }, null, 2);
+}
+
 function sortGroup(g: GroupNode): void {
   const actions = g.children.filter((c) => c.kind === "action");
   const groups = g.children.filter((c): c is GroupNode => c.kind === "group");
@@ -261,6 +277,41 @@ export function KeymapPage() {
     });
   };
 
+  const exportKeymap = async () => {
+    const { save } = await import("@/platform/dialog");
+    const name = keymapName(selectedId, customs);
+    const path = await save({
+      title: tx("Export Keymap"),
+      defaultPath: `${name.replace(/[/\\:*?"<>|]/g, "_")}.json`,
+      filters: [{ name: tx("OpenIDEA Keymap"), extensions: ["json"] }],
+    });
+    if (!path) return;
+    const json = keymapJson(
+      name,
+      isCustom ? (customs[selectedId]?.parent ?? draft.preset) : selectedId,
+      allActions(),
+      draft,
+    );
+    try {
+      // The save dialog already confirmed replacing an existing file.
+      await call(commands.fsDelete(path)).catch(() => {});
+      await call(commands.fsCreateFileBytes(path, Array.from(new TextEncoder().encode(json))));
+      notifications().notify({
+        level: "info",
+        title: tx("Keymap exported"),
+        body: path,
+        key: "keymap.export",
+      });
+    } catch (e) {
+      notifications().notify({
+        level: "error",
+        title: tx("Cannot export keymap"),
+        body: e instanceof Error ? e.message : String(e),
+        key: "keymap.export",
+      });
+    }
+  };
+
   const gearMenu = (): MenuItem[] => [
     {
       label: "Duplicate…",
@@ -268,6 +319,7 @@ export function KeymapPage() {
       run: () => setNameDialog({ mode: "duplicate", initial: copyName(keymapName(selectedId, customs), customs) }),
     },
     { label: "Import IntelliJ IDEA Keymap…", run: () => void importIdeaKeymap() },
+    { label: "Export Keymap as JSON…", run: () => void exportKeymap() },
     {
       label: "Rename…",
       icon: "edit",
diff --git a/src/platform/locales/text/en.json b/src/platform/locales/text/en.json
index ebd1aa4f7..6ab903147 100644
--- a/src/platform/locales/text/en.json
+++ b/src/platform/locales/text/en.json
@@ -1331,5 +1331,10 @@
   "Examples": "Examples",
   "Remove File": "Remove File",
   "Delegate IDE build/run actions to Maven": "Delegate IDE build/run actions to Maven",
-  "Run and Debug build Maven modules with Maven (the project's javac) instead of the Java language server. Editor problems still come from the language server.": "Run and Debug build Maven modules with Maven (the project's javac) instead of the Java language server. Editor problems still come from the language server."
+  "Run and Debug build Maven modules with Maven (the project's javac) instead of the Java language server. Editor problems still come from the language server.": "Run and Debug build Maven modules with Maven (the project's javac) instead of the Java language server. Editor problems still come from the language server.",
+  "Export Keymap as JSON…": "Export Keymap as JSON…",
+  "Export Keymap": "Export Keymap",
+  "OpenIDEA Keymap": "OpenIDEA Keymap",
+  "Keymap exported": "Keymap exported",
+  "Cannot export keymap": "Cannot export keymap"
 }
diff --git a/src/platform/locales/text/zh.json b/src/platform/locales/text/zh.json
index 376d11a58..fc3607e0e 100644
--- a/src/platform/locales/text/zh.json
+++ b/src/platform/locales/text/zh.json
@@ -7435,6 +7435,11 @@
   "Not available in OpenIDEA ({length}): {join}.": "OpenIDEA 中不可用（{length}）：{join}。",
   "Skipped {skippedShortcuts} unsupported shortcuts.": "已跳过 {skippedShortcuts} 个不支持的快捷键。",
   "Import IntelliJ IDEA Keymap…": "导入 IntelliJ IDEA 键盘映射…",
+  "Export Keymap as JSON…": "将键盘映射导出为 JSON…",
+  "Export Keymap": "导出键盘映射",
+  "OpenIDEA Keymap": "OpenIDEA 键盘映射",
+  "Keymap exported": "键盘映射已导出",
+  "Cannot export keymap": "无法导出键盘映射",
   "Color picker": "颜色选择器",
   "HEX": "十六进制",
   "Alpha percent": "透明度百分比",