diff --git a/components/app.js b/components/app.js
index e255b70..52a35f0 100644
--- a/components/app.js
+++ b/components/app.js
@@ -8,17 +8,13 @@ import Connect from "/components/connect.js";
 import Composer from "/components/composer.js";
 import ScrollManager from "/components/scroll-manager.js";
 import { html, Component, createRef } from "/lib/index.js";
-import { SERVER_BUFFER, BufferType, Status, Unread } from "/state.js";
+import { SERVER_BUFFER, BufferType, ReceiptType, Status, Unread } from "/state.js";
 import commands from "/commands.js";
+import { setup as setupKeybindings } from "/keybindings.js";
 
 const CHATHISTORY_PAGE_SIZE = 100;
 const CHATHISTORY_MAX_SIZE = 4000;
 
-const ReceiptType = {
-	DELIVERED: "delivered",
-	READ: "read",
-};
-
 var messagesCount = 0;
 
 function parseQueryString() {
@@ -758,6 +754,8 @@ export default class App extends Component {
 		if (this.state.connectParams.autoconnect) {
 			this.connect(this.state.connectParams);
 		}
+
+		setupKeybindings(this);
 	}
 
 	render() {
diff --git a/keybindings.js b/keybindings.js
new file mode 100644
index 0000000..0c37a3c
--- /dev/null
+++ b/keybindings.js
@@ -0,0 +1,50 @@
+import { ReceiptType, Unread } from "/state.js";
+
+export const keybindings = [
+	{
+		key: "h",
+		altKey: true,
+		description: "Mark all messages as read",
+		execute: (app) => {
+			app.setState((state) => {
+				var buffers = new Map();
+				state.buffers.forEach((buf) => {
+					if (buf.messages.length > 0) {
+						var lastMsg = buf.messages[buf.messages.length - 1];
+						app.setReceipt(buf.name, ReceiptType.READ, lastMsg);
+					}
+					buffers.set(buf.name, {
+						...buf,
+						unread: Unread.NONE,
+					});
+				});
+				return { buffers };
+			});
+		},
+	},
+];
+
+export function setup(app) {
+	var byKey = {};
+	keybindings.forEach((binding) => {
+		if (!byKey[binding.key]) {
+			byKey[binding.key] = [];
+		}
+		byKey[binding.key].push(binding);
+	});
+
+	window.addEventListener("keydown", (event) => {
+		var candidates = byKey[event.key];
+		if (!candidates) {
+			return;
+		}
+		candidates = candidates.filter((binding) => {
+			return !!binding.altKey == event.altKey && !!binding.ctrlKey == event.ctrlKey;
+		});
+		if (candidates.length != 1) {
+			return;
+		}
+		event.preventDefault();
+		candidates[0].execute(app);
+	});
+}
diff --git a/state.js b/state.js
index bd98d77..0409e0d 100644
--- a/state.js
+++ b/state.js
@@ -27,6 +27,11 @@ export const Unread = {
 	},
 };
 
+export const ReceiptType = {
+	DELIVERED: "delivered",
+	READ: "read",
+};
+
 export function getNickURL(nick) {
 	return "irc:///" + encodeURIComponent(nick) + ",isnick";
 }