diff --git a/encode_flag/index.html b/encode_flag/index.html
deleted file mode 100644
index 1b8fe91..0000000
--- a/encode_flag/index.html
+++ /dev/null
@@ -1,56 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>CCTF flag encoder</title>
-    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
-  </head>
-
-  <body>
-    <div style="padding: 20px">
-    <h1>CCTF flag encoder</h1>
-    <details>
-      <summary>Instructions</summary>
-      <ul>
-        <li>Enter your flag to the box, and press encode!</li>
-        <li>Your encoded flag will appear below.</li>
-        <li>Copy the encoded flag into your contract call.</li>
-      </ul>
-    </details>
-    <br />
-    <div class="form">
-      <div class="form-group">
-        <input class="flag" placeholder="enter the flag" /><-- Your flag
-      </div>
-      <div class="form-group">
-        <input class="address" placeholder="enter the address" /><-- Your address
-      </div>
-      <div class="form-group">
-        <button class="encode">Encode Flag</button>
-      </div>
-      <div class="form-group">
-          <input class="encoded" disabled="true" placeholder="" /><-- Your encoded result
-      </div>
-    </div>
-  </div>
-  </body>
-  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.min.js" integrity="sha384-cuYeSxntonz0PPNlHhBs68uyIAVpIIOZZ5JqeqvYYIcEL727kskC66kF92t6Xl2V" crossorigin="anonymous"></script>
-  <script src="https://cdn.jsdelivr.net/npm/web3@latest/dist/web3.min.js"></script>
-  <script>
-    const web3 = new Web3(new Web3.providers.HttpProvider('http://127.0.0.1:8545'));
-    console.log(web3);
-    const encodeButton = document.querySelector('button.encode');
-    encodeButton.addEventListener('click', encodeMessage);
-
-    async function encodeMessage() {
-      try {
-        const flag = document.querySelector('.flag').value;
-        const address = document.querySelector('.address').value;
-        const signedMsg = web3.eth.accounts.sign(address, flag);
-        document.querySelector('.encoded').value = signedMsg.signature;
-      } catch (err) {
-        console.error(err);
-        alert('Problem happened: ' + err.message || err);
-      }
-    }
-  </script>
-</html>
