diff --git a/index.html b/index.html
index 3d5521d..f167750 100644
--- a/index.html
+++ b/index.html
@@ -484,6 +484,15 @@
           <div class="tooltip">JSON 格式化</div>
         </div>
 
+        <div class="tool-item" data-tool="url">
+          <div class="tool-icon">🔗</div>
+          <div class="tool-info">
+            <h3>URL 编解码</h3>
+            <p>URL 编码和解码工具，支持多种编码格式</p>
+          </div>
+          <div class="tooltip">URL 编解码</div>
+        </div>
+
         <div class="tool-item" data-tool="other">
           <div class="tool-icon">⚙️</div>
           <div class="tool-info">
@@ -590,6 +599,11 @@
           url: "json_formatter.html",
           hash: "#json",
         },
+        url: {
+          title: "URL 编解码",
+          url: "url_encoder.html",
+          hash: "#url",
+        },
         other: {
           title: "其他功能",
           url: "other_function.html",
diff --git a/url_encoder.html b/url_encoder.html
new file mode 100644
index 0000000..701b5d0
--- /dev/null
+++ b/url_encoder.html
@@ -0,0 +1,690 @@
+<!doctype html>
+<html lang="zh-CN">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>URL 编解码工具 - 功能工具箱</title>
+    <style>
+      * {
+        margin: 0;
+        padding: 0;
+        box-sizing: border-box;
+      }
+
+      body {
+        font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
+        margin: 0;
+        padding: 0;
+        color: #333;
+        overflow: hidden;
+      }
+
+      .container {
+        width: 100vw;
+        height: 100vh;
+        display: flex;
+        flex-direction: column;
+      }
+
+      .header {
+        background: #f5f5f5;
+        padding: 15px 20px;
+        text-align: center;
+        border-bottom: 1px solid #ddd;
+        flex-shrink: 0;
+      }
+
+      .header h1 {
+        font-size: 1.5em;
+        margin-bottom: 5px;
+        font-weight: 600;
+      }
+
+      .header p {
+        font-size: 0.9em;
+        color: #666;
+        margin: 0;
+      }
+
+      .controls {
+        padding: 10px 15px;
+        background: #f9f9f9;
+        border-bottom: 1px solid #ddd;
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+        flex-wrap: wrap;
+        gap: 10px;
+        flex-shrink: 0;
+      }
+
+      .control-group {
+        display: flex;
+        gap: 10px;
+        align-items: center;
+      }
+
+      button {
+        padding: 8px 16px;
+        border: 1px solid #ddd;
+        border-radius: 4px;
+        font-size: 14px;
+        cursor: pointer;
+        display: flex;
+        align-items: center;
+        gap: 5px;
+        background: white;
+      }
+
+      button:hover {
+        background: #f0f0f0;
+      }
+
+      .btn-primary {
+        background: #007bff;
+        color: white;
+        border-color: #007bff;
+      }
+
+      .btn-primary:hover {
+        background: #0056b3;
+      }
+
+      .btn-secondary {
+        background: #6c757d;
+        color: white;
+        border-color: #6c757d;
+      }
+
+      .btn-secondary:hover {
+        background: #5a6268;
+      }
+
+      .btn-success {
+        background: #28a745;
+        color: white;
+        border-color: #28a745;
+      }
+
+      .btn-success:hover {
+        background: #218838;
+      }
+
+      .editor-container {
+        display: flex;
+        flex: 1;
+        min-height: 400px;
+      }
+
+      .editor-panel {
+        flex: 1;
+        display: flex;
+        flex-direction: column;
+        position: relative;
+      }
+
+      .editor-header {
+        padding: 10px 15px;
+        background: #f5f5f5;
+        border-bottom: 1px solid #ddd;
+        font-weight: 600;
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+        font-size: 14px;
+      }
+
+      .editor-content {
+        flex: 1;
+        position: relative;
+      }
+
+      textarea {
+        width: 100%;
+        height: 100%;
+        border: none;
+        outline: none;
+        padding: 15px;
+        font-family: "Consolas", "Monaco", "Courier New", monospace;
+        font-size: 13px;
+        line-height: 1.4;
+        resize: none;
+        background: white;
+        color: #333;
+      }
+
+      .output-area {
+        background: white;
+        padding: 15px;
+        font-family: "Consolas", "Monaco", "Courier New", monospace;
+        font-size: 13px;
+        line-height: 1.4;
+        white-space: pre-wrap;
+        overflow: auto;
+        height: 100%;
+        color: #333;
+        word-break: break-all;
+      }
+
+      .error-message {
+        background: #f8d7da;
+        color: #721c24;
+        padding: 15px;
+        border-radius: 8px;
+        margin: 20px;
+        border: 1px solid #f5c6cb;
+        display: none;
+      }
+
+      .success-message {
+        background: #d4edda;
+        color: #155724;
+        padding: 15px;
+        border-radius: 8px;
+        margin: 20px;
+        border: 1px solid #c3e6cb;
+        display: none;
+      }
+
+      .divider {
+        width: 2px;
+        background: #ddd;
+        cursor: col-resize;
+      }
+
+      .divider:hover {
+        background: #bbb;
+      }
+
+      .status-bar {
+        background: #f5f5f5;
+        border-top: 1px solid #ddd;
+        padding: 6px 15px;
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+        font-size: 12px;
+        color: #666;
+        flex-shrink: 0;
+      }
+
+      .char-count {
+        color: #999;
+      }
+
+      .encoding-options {
+        display: flex;
+        gap: 15px;
+        align-items: center;
+      }
+
+      .option-group {
+        display: flex;
+        align-items: center;
+        gap: 5px;
+      }
+
+      .option-group label {
+        font-size: 14px;
+        color: #666;
+      }
+
+      .option-group select {
+        padding: 4px 8px;
+        border: 1px solid #ddd;
+        border-radius: 3px;
+        font-size: 14px;
+      }
+
+      @media (max-width: 768px) {
+        .editor-container {
+          flex-direction: column;
+          height: auto;
+        }
+
+        .divider {
+          width: 100%;
+          height: 4px;
+          cursor: row-resize;
+        }
+
+        .divider::before {
+          content: "⋯";
+        }
+
+        .editor-panel {
+          min-height: 300px;
+        }
+
+        .controls {
+          flex-direction: column;
+          align-items: stretch;
+        }
+
+        .control-group {
+          justify-content: center;
+        }
+      }
+
+      .loading {
+        display: none;
+        color: #007bff;
+        font-style: italic;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="container">
+      <div class="header">
+        <h1>🔗 URL 编解码工具</h1>
+        <p>URL 编码和解码工具，支持多种编码格式和实时转换</p>
+      </div>
+
+      <div class="controls">
+        <div class="control-group">
+          <div
+            class="mode-buttons"
+            style="
+              display: flex;
+              border: 1px solid #ddd;
+              border-radius: 4px;
+              overflow: hidden;
+            "
+          >
+            <button
+              id="encodeBtn"
+              class="btn-primary"
+              onclick="setMode('encode')"
+              style="border-radius: 0; border: none; margin: 0"
+            >
+              编码
+            </button>
+            <button
+              id="decodeBtn"
+              class="btn-secondary"
+              onclick="setMode('decode')"
+              style="
+                border-radius: 0;
+                border: none;
+                margin: 0;
+                border-left: 1px solid #ddd;
+              "
+            >
+              解码
+            </button>
+          </div>
+          <button class="btn-success" onclick="copyResult()">复制结果</button>
+          <button class="btn-secondary" onclick="clearAll()">清空</button>
+        </div>
+
+        <div class="encoding-options">
+          <div class="option-group">
+            <label for="encodingType">编码类型:</label>
+            <select id="encodingType" onchange="handleInputChange()">
+              <option value="component">URIComponent (推荐)</option>
+              <option value="full">完整 URL</option>
+              <option value="form">表单编码</option>
+              <option value="base64">Base64</option>
+            </select>
+          </div>
+        </div>
+      </div>
+
+      <div class="editor-container">
+        <div class="editor-panel">
+          <div class="editor-header">
+            <span>输入 URL/文本</span>
+            <span class="char-count" id="inputCount">0 字符</span>
+          </div>
+          <div class="editor-content">
+            <textarea
+              id="urlInput"
+              placeholder="在此输入要编码或解码的 URL 或文本...
+
+例如: https://example.com/search?q=测试参数&lang=zh-CN"
+              oninput="handleInputChange()"
+            ></textarea>
+          </div>
+        </div>
+
+        <div class="divider"></div>
+
+        <div class="editor-panel">
+          <div class="editor-header">
+            <span>处理结果</span>
+            <span class="char-count" id="outputCount">0 字符</span>
+          </div>
+          <div class="editor-content">
+            <div id="urlOutput" class="output-area">
+              编码/解码结果将显示在这里...
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <div class="error-message" id="errorMessage"></div>
+      <div class="success-message" id="successMessage"></div>
+
+      <div class="status-bar">
+        <span id="status">就绪</span>
+        <span id="processingStatus" class="loading">正在处理...</span>
+      </div>
+    </div>
+
+    <script>
+      let isAutoProcessing = true;
+      let currentMode = "encode"; // 'encode' 或 'decode'
+
+      function setMode(mode) {
+        currentMode = mode;
+        const encodeBtn = document.getElementById("encodeBtn");
+        const decodeBtn = document.getElementById("decodeBtn");
+
+        if (mode === "encode") {
+          encodeBtn.className = "btn-primary";
+          decodeBtn.className = "btn-secondary";
+        } else {
+          encodeBtn.className = "btn-secondary";
+          decodeBtn.className = "btn-primary";
+        }
+
+        // 重新处理当前输入
+        const input = document.getElementById("urlInput").value.trim();
+        if (input) {
+          processInput();
+        }
+      }
+
+      function handleInputChange() {
+        updateCharCount();
+        if (isAutoProcessing) {
+          // 延迟处理，避免频繁操作
+          clearTimeout(window.processTimeout);
+          window.processTimeout = setTimeout(() => {
+            processInput();
+          }, 300);
+        }
+      }
+
+      function processInput() {
+        const input = document.getElementById("urlInput").value.trim();
+        const output = document.getElementById("urlOutput");
+
+        if (!input) {
+          output.textContent = "处理结果将显示在这里...";
+          updateCharCount();
+          return;
+        }
+
+        if (currentMode === "encode") {
+          encodeURL(false);
+        } else {
+          decodeURL(false);
+        }
+      }
+
+      function updateCharCount() {
+        const input = document.getElementById("urlInput");
+        const output = document.getElementById("urlOutput");
+        const inputCount = document.getElementById("inputCount");
+        const outputCount = document.getElementById("outputCount");
+
+        inputCount.textContent = input.value.length + " 字符";
+        outputCount.textContent = output.textContent.length + " 字符";
+      }
+
+      function encodeURL(showMessages = true) {
+        const input = document.getElementById("urlInput").value.trim();
+        const output = document.getElementById("urlOutput");
+        const errorMessage = document.getElementById("errorMessage");
+        const successMessage = document.getElementById("successMessage");
+        const processingStatus = document.getElementById("processingStatus");
+        const encodingType = document.getElementById("encodingType").value;
+
+        // 清除之前的消息
+        if (showMessages) {
+          errorMessage.style.display = "none";
+          successMessage.style.display = "none";
+          processingStatus.style.display = "block";
+        }
+
+        if (!input) {
+          output.textContent = "请输入要编码的内容";
+          if (showMessages) {
+            processingStatus.style.display = "none";
+          }
+          updateCharCount();
+          return;
+        }
+
+        try {
+          let result = "";
+
+          switch (encodingType) {
+            case "component":
+              result = encodeURIComponent(input);
+              break;
+            case "full":
+              result = encodeURI(input);
+              break;
+            case "form":
+              result = formEncode(input);
+              break;
+            case "base64":
+              result = btoa(unescape(encodeURIComponent(input)));
+              break;
+            default:
+              result = encodeURIComponent(input);
+          }
+
+          output.textContent = result;
+
+          if (showMessages) {
+            // 显示成功消息
+            successMessage.textContent = `✅ ${getEncodingName(encodingType)}编码成功！`;
+            successMessage.style.display = "block";
+
+            // 3秒后隐藏成功消息
+            setTimeout(() => {
+              successMessage.style.display = "none";
+            }, 3000);
+          }
+        } catch (error) {
+          output.textContent = "";
+          if (showMessages) {
+            errorMessage.innerHTML = `❌ 编码错误: ${error.message}`;
+            errorMessage.style.display = "block";
+          }
+        }
+
+        if (showMessages) {
+          processingStatus.style.display = "none";
+        }
+        updateCharCount();
+      }
+
+      function decodeURL(showMessages = true) {
+        const input = document.getElementById("urlInput").value.trim();
+        const output = document.getElementById("urlOutput");
+        const errorMessage = document.getElementById("errorMessage");
+        const successMessage = document.getElementById("successMessage");
+        const processingStatus = document.getElementById("processingStatus");
+        const encodingType = document.getElementById("encodingType").value;
+
+        // 清除之前的消息
+        if (showMessages) {
+          errorMessage.style.display = "none";
+          successMessage.style.display = "none";
+          processingStatus.style.display = "block";
+        }
+
+        if (!input) {
+          output.textContent = "请输入要解码的内容";
+          if (showMessages) {
+            processingStatus.style.display = "none";
+          }
+          updateCharCount();
+          return;
+        }
+
+        try {
+          let result = "";
+
+          switch (encodingType) {
+            case "component":
+              result = decodeURIComponent(input);
+              break;
+            case "full":
+              result = decodeURI(input);
+              break;
+            case "form":
+              result = formDecode(input);
+              break;
+            case "base64":
+              result = decodeURIComponent(escape(atob(input)));
+              break;
+            default:
+              result = decodeURIComponent(input);
+          }
+
+          output.textContent = result;
+
+          if (showMessages) {
+            // 显示成功消息
+            successMessage.textContent = `✅ ${getEncodingName(encodingType)}解码成功！`;
+            successMessage.style.display = "block";
+
+            // 3秒后隐藏成功消息
+            setTimeout(() => {
+              successMessage.style.display = "none";
+            }, 3000);
+          }
+        } catch (error) {
+          output.textContent = "";
+          if (showMessages) {
+            errorMessage.innerHTML = `❌ 解码错误: ${error.message}`;
+            errorMessage.style.display = "block";
+          }
+        }
+
+        if (showMessages) {
+          processingStatus.style.display = "none";
+        }
+        updateCharCount();
+      }
+
+      function formEncode(str) {
+        return encodeURIComponent(str).replace(/%20/g, "+");
+      }
+
+      function formDecode(str) {
+        return decodeURIComponent(str.replace(/\+/g, "%20"));
+      }
+
+      function getEncodingName(type) {
+        const names = {
+          component: "URIComponent",
+          full: "完整 URL",
+          form: "表单",
+          base64: "Base64",
+        };
+        return names[type] || "URL";
+      }
+
+      function copyResult() {
+        const output = document.getElementById("urlOutput");
+        const successMessage = document.getElementById("successMessage");
+
+        if (
+          !output.textContent ||
+          output.textContent === "编码/解码结果将显示在这里..." ||
+          output.textContent === "请输入要编码的内容" ||
+          output.textContent === "请输入要解码的内容"
+        ) {
+          alert("没有可复制的内容！");
+          return;
+        }
+
+        // 获取纯文本内容
+        const textToCopy = output.textContent || output.innerText;
+
+        navigator.clipboard
+          .writeText(textToCopy)
+          .then(() => {
+            successMessage.textContent = "📋 已复制到剪贴板！";
+            successMessage.style.display = "block";
+
+            setTimeout(() => {
+              successMessage.style.display = "none";
+            }, 2000);
+          })
+          .catch(() => {
+            // 降级方案
+            const textArea = document.createElement("textarea");
+            textArea.value = textToCopy;
+            document.body.appendChild(textArea);
+            textArea.select();
+            document.execCommand("copy");
+            document.body.removeChild(textArea);
+
+            successMessage.textContent = "📋 已复制到剪贴板！";
+            successMessage.style.display = "block";
+
+            setTimeout(() => {
+              successMessage.style.display = "none";
+            }, 2000);
+          });
+      }
+
+      function clearAll() {
+        document.getElementById("urlInput").value = "";
+        document.getElementById("urlOutput").textContent =
+          "编码/解码结果将显示在这里...";
+        document.getElementById("errorMessage").style.display = "none";
+        document.getElementById("successMessage").style.display = "none";
+        updateCharCount();
+      }
+
+      // 键盘快捷键
+      document.addEventListener("keydown", function (e) {
+        // Ctrl/Cmd + Enter 根据当前模式处理
+        if ((e.ctrlKey || e.metaKey) && e.key === "Enter") {
+          e.preventDefault();
+          if (currentMode === "encode") {
+            encodeURL();
+          } else {
+            decodeURL();
+          }
+        }
+        // Ctrl/Cmd + Shift + Enter 切换模式
+        if ((e.ctrlKey || e.metaKey) && e.shiftKey && e.key === "Enter") {
+          e.preventDefault();
+          setMode(currentMode === "encode" ? "decode" : "encode");
+        }
+        // Ctrl/Cmd + Shift + C 复制结果
+        if ((e.ctrlKey || e.metaKey) && e.shiftKey && e.key === "C") {
+          e.preventDefault();
+          copyResult();
+        }
+      });
+
+      // 页面加载完成后的初始化
+      document.addEventListener("DOMContentLoaded", function () {
+        const input = document.getElementById("urlInput");
+        input.focus();
+        updateCharCount();
+
+        // 初始化为编码模式
+        setMode("encode");
+      });
+
+      // 示例 URL
+      const exampleURL =
+        "https://example.com/search?q=测试参数&lang=zh-CN&page=1";
+
+      // 如果需要加载示例，可以取消下面的注释
+      // document.getElementById('urlInput').value = exampleURL;
+      // encodeURL();
+    </script>
+  </body>
+</html>
\ No newline at end of file
