XML Formatter

This XML Formatter tool helps you beautify and format XML data with proper indentation and structure. It makes XML code more readable and easier to understand by organizing elements hierarchically.

How to use: Paste your XML code below, select formatting options, and click “Format XML” to beautify or “Minify” to compress. Errors will be shown if XML is invalid.

Paste your XML code:

<div class="indent-option">
        <label for="indentSize">Indent Size:</label>
        <select id="indentSize" class="form-control">
          <option value="2">2 spaces</option>
          <option value="4" selected>4 spaces</option>
          <option value="8">8 spaces</option>
          <option value="tab">Tab</option>
        </select>
      </div>

<div class="indent-option">
        <label for="newlineOption">Newline:</label>
        <select id="newlineOption" class="form-control">
          <option value="lf" selected>LF (Unix)</option>
          <option value="crlf">CRLF (Windows)</option>
        </select>
      </div>
    </div>

<div>
      <button id="formatBtn" class="btn-format">Format XML</button>
      <button id="minifyBtn" class="btn-minify">Minify XML</button>
    </div>
  </div>

<div id="resultContainer" class="result-container">
    <div id="validationResult"></div>
    <div id="codeOutput" class="code-output"></div>
    <button id="copyBtn" class="copy-btn">Copy to Clipboard</button>
  </div>

const formatBtn = container.querySelector('#formatBtn');
      const minifyBtn = container.querySelector('#minifyBtn');
      const copyBtn = container.querySelector('#copyBtn');
      const xmlInput = container.querySelector('#xmlInput');
      const validationResult = container.querySelector('#validationResult');
      const codeOutput = container.querySelector('#codeOutput');
      const resultContainer = container.querySelector('#resultContainer');

formatBtn.addEventListener('click', () => processXml(false));
      minifyBtn.addEventListener('click', () => processXml(true));
      copyBtn.addEventListener('click', copyToClipboard);

function processXml(minify) {
        const xml = xmlInput.value.trim();
        if (!xml) {
          alert('Please enter some XML code');
          return;
        }
        clearResults();

try {
          const parser = new DOMParser();
          const xmlDoc = parser.parseFromString(xml, 'text/xml');
          const parseError = xmlDoc.getElementsByTagName('parsererror');

if (parseError.length) {
            throw new Error(parseError[0].textContent);
          }

const indentSize = container.querySelector('#indentSize').value;
          const newlineOption = container.querySelector('#newlineOption').value;

let formattedXml;
          if (minify) {
            formattedXml = minifyXml(xml);
          } else {
            let indent = indentSize === 'tab' ? '\t' : ' '.repeat(parseInt(indentSize));
            let newline = newlineOption === 'crlf' ? '\r\n' : '\n';
            formattedXml = formatXml(xml, indent, newline);
          }

validationResult.className = 'validation-result validation-success';
          validationResult.innerHTML = '<strong>Valid XML!</strong> Your XML is correctly formatted.';

codeOutput.innerHTML = highlightXml(escapeHtml(formattedXml));
          resultContainer.style.display = 'block';
        } catch (err) {
          validationResult.className = 'validation-result validation-error';
          validationResult.innerHTML = `<strong>Invalid XML:</strong> ${err.message}`;
          codeOutput.textContent = xml;
          resultContainer.style.display = 'block';
        }
      }

function formatXml(xml, indent, newline) {
        let formatted = xml.replace(/>\s*</g, '><');
        let indentLevel = 0;
        let result = '';
        let inTag = false;
        let inComment = false;
        let inCDATA = false;

for (let i = 0; i < formatted.length; i++) {
          const char = formatted.charAt(i);

if (inComment) {
            result += char;
            if (i > 1 && char === '>' && formatted.charAt(i - 1) === '-' && formatted.charAt(i - 2) === '-') {
              inComment = false;
              result += newline;
            }
            continue;
          }

if (inCDATA) {
            result += char;
            if (i > 2 && char === '>' && formatted.charAt(i - 1) === ']' && formatted.charAt(i - 2) === ']') {
              inCDATA = false;
            }
            continue;
          }

if (i < formatted.length - 3 && char === '<' && formatted.charAt(i + 1) === '!' &&
              formatted.charAt(i + 2) === '-' && formatted.charAt(i + 3) === '-') {
            inComment = true;
            result += newline + indent.repeat(indentLevel) + char;
            continue;
          }

if (i < formatted.length - 8 && char === '<' && formatted.charAt(i + 1) === '!' &&
              formatted.substring(i + 2, i + 9) === '[CDATA[') {
            inCDATA = true;
            result += char;
            continue;
          }

if (char === '<' && formatted.charAt(i + 1) !== '/') {
            result += newline + indent.repeat(indentLevel) + char;
            indentLevel++;
            inTag = true;
          } else if (char === '<' && formatted.charAt(i + 1) === '/') {
            indentLevel--;
            if (!inTag) {
              result += newline + indent.repeat(indentLevel);
            }
            result += char;
            inTag = true;
          } else if (char === '>') {
            result += char;
            inTag = false;
          } else {
            result += char;
          }
        }
        return result.trim();
      }

function minifyXml(xml) {
        let minified = xml.replace(//g, '');
        minified = minified.replace(/>\s*</g, '><');
        minified = minified.replace(/^\s+|\s+$/gm, '');
        minified = minified.replace(/\s*=\s*/g, '=');
        return minified;
      }

function highlightXml(xml) {
        let highlighted = xml.replace(/(<\/?)([a-zA-Z0-9:_.-]+)(?=[^>]*>)/g, '$1<span class="xml-tag">$2</span>');
        highlighted = highlighted.replace(/\s([a-zA-Z0-9:_.-]+)=("|')([^"']*?)(\2)/g, ' <span class="xml-attr-name">$1</span>=<span class="xml-attr-value">$2$3$4</span>');
        highlighted = highlighted.replace(/(<!--)([\s\S]*?)(--)>/g, '<span class="xml-comment">$1$2$3></span>');
        highlighted = highlighted.replace(/(<!\[CDATA\[)([\s\S]*?)(\]\])>/g, '<span class="xml-cdata">$1$2$3></span>');
        return highlighted;
      }

function escapeHtml(unsafe) {
        return unsafe.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">").replace(/"/g, """).replace(/'/g, "'");
      }

function clearResults() {
        validationResult.textContent = '';
        codeOutput.textContent = '';
        resultContainer.style.display = 'none';
      }
    })();
  </script>
</div>

</div>

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