diff --git a/README.md b/README.md
index e7acaf7..c1dd40b 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,56 @@
-# media-converter
-MP4 to WebM Converter in Browser
+[![Action Status](https://github.com/web-atoms/media-converter/workflows/Build/badge.svg)](https://github.com/web-atoms/media-converter/actions) [![npm version](https://badge.fury.io/js/%40web-atoms%2Fcore.svg)](https://badge.fury.io/js/%40web-atoms%2Fcore)
+
+
+# Media Convert
+MP4 to WebM Converter in Browser using WebCodecs
+
+1. WebCodecs provides faster media encoder/decoder.
+2. Supports resizing video to lower file size by reudcing bit rate.
+3. Supported on Chrome.
+
+```html
+<!DOCTYPE HTML>
+<html>
+    <head></head>
+    <body>
+        <div>Choose File</div>
+        <input id="videoFile" type="file" accept="video/*">
+        <progress min="0" max="1"></progress>
+        <video controls="true" style="height: 500px"></video>
+        <pre style="height: 400px; width: 100%"></pre>
+
+        <script type="module">
+
+            import { MediaConverter } from "https://cdn.jsdelivr.net/npm/@web-atoms/media-converter@1.0.4/dist/index.js"
+
+            const progress = document.body.querySelector("progress");
+            const pre = document.body.querySelector("pre");
+            const input = document.body.querySelector("input");
+            const video = document.body.querySelector("video");
+
+            progress.style.display = "none";
+
+            input.onchange = () => {
+                convertFile(input.files[0]).catch((error) => {
+                    pre.append(document.createTextNode((error.stack ?? stack) + "\n"));
+                })
+            };
+
+            async function convertFile(file) {
+                progress.style.removeProperty("display");
+                const mc = new MediaConverter();
+                const output = await mc.convert(file, {
+                    outputName: file.name + ".webm",
+                    maxHeight: 720,
+                    maxSize: 25*1024*1024,
+                    onProgress: (x) => progress.value = x
+                });
+
+                const url = URL.createObjectURL(output);
+                video.src = url;
+                progress.style.display = "none";
+            }
+        </script>
+    </body>
+</html>
+```
