diff --git a/cli.js b/cli.js
new file mode 100755
index 0000000..7265d14
--- /dev/null
+++ b/cli.js
@@ -0,0 +1,15 @@
+#!/usr/bin/env node
+// Simple CLI for KaTeX.
+// Reads TeX from stdin, outputs HTML to stdout.
+
+var katex = require("./");
+var input = "";
+
+process.stdin.on("data", function(chunk) {
+  input += chunk.toString();
+});
+
+process.stdin.on("end", function() {
+  var output = katex.renderToString(input);
+  console.log(output);
+});
diff --git a/package.json b/package.json
index 88d2604..1494426 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
     },
     "files": [
         "katex.js",
+        "cli.js",
         "src/"
     ],
     "license": "MIT",
@@ -21,6 +22,7 @@
         "huxley": "~0.7.4",
         "jasmine-node": "git://github.com/mhevery/jasmine-node.git#Jasmine2.0"
     },
+    "bin": "cli.js",
     "scripts": {
         "test": "make test"
     }