One-File-Tools/tools/svg-optimizer.html at main · praveenscience/One-File-Tools · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>SVG Optimizer — One File Tools</title>
    <style>
      /* ========================================
         Reset & Base
         ======================================== */
      *,
      *::before,
      *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
      }

      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
        line-height: 1.6;
        padding: 2rem;
        max-width: 960px;
        margin: 0 auto;
        background: #fafafa;
        color: #1a1a1a;
      }

      /* ========================================
         Dark Mode
         ======================================== */
      @media (prefers-color-scheme: dark) {
        body {
          background: #0a0a0a;
          color: #e5e5e5;
        }
      }

      /* ========================================
         Your styles here
         ======================================== */
      header {
        margin-bottom: 2rem;
      }

      .container {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.5rem;
      }
      @media (min-width: 768px) {
        .container {
          grid-template-columns: 1fr 1fr;
        }
      }

      .card {
        background: #ffffff;
        border-radius: 8px;
        padding: 1.5rem;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        border: 1px solid #eaeaea;
        display: flex;
        flex-direction: column;
      }

      @media (prefers-color-scheme: dark) {
        .card {
          background: #171717;
          border-color: #333;
        }
      }

      label {
        font-weight: 600;
        margin-bottom: 0.5rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
      }

      .badge {
        background: #2563eb;
        color: #fff;
        font-size: 0.75rem;
        padding: 0.2rem 0.5rem;
        border-radius: 9999px;
      }

      textarea {
        width: 100%;
        padding: 0.75rem;
        border: 1px solid #ccc;
        border-radius: 4px;
        font-family: monospace;
        font-size: 0.875rem;
        background: #fff;
        color: inherit;
        resize: vertical;
        min-height: 250px;
        flex: 1;
      }

      @media (prefers-color-scheme: dark) {
        textarea {
          background: #262626;
          border-color: #444;
        }
      }

      .preview-box {
        margin-top: 1.5rem;
        padding: 1rem;
        border: 1px dashed #ccc;
        border-radius: 4px;
        background: #fff;
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 150px;
      }

      @media (prefers-color-scheme: dark) {
        .preview-box {
          background: #111;
          border-color: #444;
        }
      }

      .preview-box svg {
        max-width: 100%;
        max-height: 250px;
      }

      .controls {
        display: flex;
        gap: 1rem;
        margin-top: 1rem;
      }

      button {
        padding: 0.5rem 1rem;
        border: none;
        border-radius: 4px;
        cursor: pointer;
        font-size: 0.875rem;
        font-weight: 500;
        transition: background-color 0.2s;
      }

      .btn-primary {
        background: #2563eb;
        color: #fff;
      }
      .btn-primary:hover {
        background: #1d4ed8;
      }

      .stats {
        margin-top: 1rem;
        font-size: 0.875rem;
        color: #10b981;
        font-weight: 600;
      }

      footer {
        margin-top: 3rem;
      }
    </style>
  </head>
  <body>
    <header>
      <h1>SVG Optimizer</h1>
      <p>Compress and optimize raw SVG code by removing unnecessary metadata, empty tags, and comments.</p>
    </header>

    <main>
      <div class="container">
        <!-- Input Section -->
        <div class="card">
          <label>Raw SVG Input <span class="badge" id="raw-size">0 B</span></label>
          <textarea id="raw-svg" placeholder="Paste your raw SVG code here..."></textarea>
          <div class="controls">
            <button class="btn-primary" id="optimize-btn">Optimize SVG</button>
          </div>
        </div>

        <!-- Output Section -->
        <div class="card">
          <label>Optimized SVG Output <span class="badge" id="opt-size" style="background: #10b981">0 B</span></label>
          <textarea id="opt-svg" readonly placeholder="Optimized code will appear here..."></textarea>
          <div class="controls">
            <button class="btn-primary" id="copy-btn">Copy to Clipboard</button>
            <button class="btn-primary" id="download-btn" style="background: #4b5563">Download .svg</button>
          </div>
          <div id="savings" class="stats"></div>

          <label style="margin-top: 1.5rem">Live Preview</label>
          <div class="preview-box" id="preview-container">
            <span style="color: #666; font-size: 0.875rem">Preview will appear here</span>
          </div>
        </div>
      </div>
    </main>

    <footer>
      <p>
        Part of
        <a href="https://github.com/praveenscience/One-File-Tools">One File Tools</a>
      </p>
    </footer>

    <script>
      const rawSvgInput = document.getElementById("raw-svg");
      const optSvgInput = document.getElementById("opt-svg");
      const rawSizeBadge = document.getElementById("raw-size");
      const optSizeBadge = document.getElementById("opt-size");
      const savingsInfo = document.getElementById("savings");
      const previewContainer = document.getElementById("preview-container");

      const optimizeBtn = document.getElementById("optimize-btn");
      const copyBtn = document.getElementById("copy-btn");
      const downloadBtn = document.getElementById("download-btn");

      function formatBytes(bytes) {
        if (bytes === 0) return "0 B";
        const k = 1024;
        const sizes = ["B", "KB", "MB"];
        const i = Math.floor(Math.log(bytes) / Math.log(k));
        return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + " " + sizes[i];
      }

      function updateSizeInfo(rawStr, optStr) {
        const rawBytes = new Blob([rawStr]).size;
        const optBytes = new Blob([optStr]).size;

        rawSizeBadge.textContent = formatBytes(rawBytes);
        optSizeBadge.textContent = formatBytes(optBytes);

        if (rawBytes > 0) {
          const savings = rawBytes - optBytes;
          const percent = ((savings / rawBytes) * 100).toFixed(1);
          if (savings > 0) {
            savingsInfo.textContent = `Saved ${formatBytes(savings)} (${percent}%)!`;
          } else {
            savingsInfo.textContent = "Already optimized!";
            savingsInfo.style.color = "#6b7280";
          }
        } else {
          savingsInfo.textContent = "";
        }
      }

      function optimizeSVG(svgString) {
        if (!svgString.trim()) return "";

        try {
          // Parse SVG string to DOM
          const parser = new DOMParser();
          const doc = parser.parseFromString(svgString, "image/svg+xml");

          if (doc.querySelector("parsererror")) {
            throw new Error("Invalid SVG format");
          }

          // 1. Remove unnecessary metadata elements
          const tagsToRemove = ["title", "desc", "metadata", "defs"];
          tagsToRemove.forEach((tag) => {
            const elements = doc.querySelectorAll(tag);
            elements.forEach((el) => {
              // only remove defs if it's completely empty
              if (tag === "defs" && el.children.length > 0) return;
              el.parentNode.removeChild(el);
            });
          });

          // 2. Remove comments and empty text nodes
          const walker = document.createTreeWalker(doc, NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT, null, false);
          const nodesToRemove = [];
          let node;
          while ((node = walker.nextNode())) {
            if (node.nodeType === Node.COMMENT_NODE) {
              nodesToRemove.push(node);
            } else if (node.nodeType === Node.TEXT_NODE && node.nodeValue.trim() === "") {
              nodesToRemove.push(node);
            }
          }
          nodesToRemove.forEach((n) => n.parentNode.removeChild(n));

          // 3. Remove empty groups <g> recursively
          let removedGroup;
          do {
            removedGroup = false;
            const groups = doc.querySelectorAll("g");
            groups.forEach((g) => {
              if (g.children.length === 0) {
                g.parentNode.removeChild(g);
                removedGroup = true;
              }
            });
          } while (removedGroup);

          // Serialize back to string
          const serializer = new XMLSerializer();
          let optimized = serializer.serializeToString(doc.documentElement);

          // 4. Minify string (remove unnecessary whitespace between tags)
          optimized = optimized.replace(/>\s+</g, "><");
          // Remove whitespace around self closing tags
          optimized = optimized.replace(/\s+\/>/g, "/>");

          return optimized;
        } catch (e) {
          alert("Error parsing SVG: " + e.message);
          return svgString;
        }
      }

      function handleOptimization() {
        const rawSvg = rawSvgInput.value;
        const optimizedSvg = optimizeSVG(rawSvg);

        optSvgInput.value = optimizedSvg;
        updateSizeInfo(rawSvg, optimizedSvg);

        if (optimizedSvg) {
          previewContainer.innerHTML = optimizedSvg;
        } else {
          previewContainer.innerHTML = '<span style="color: #666; font-size: 0.875rem;">Preview will appear here</span>';
        }
      }

      optimizeBtn.addEventListener("click", handleOptimization);

      // Auto-update when pasting
      rawSvgInput.addEventListener("input", () => {
        // optionally auto-optimize on paste
        handleOptimization();
      });

      copyBtn.addEventListener("click", () => {
        if (!optSvgInput.value) return;
        navigator.clipboard.writeText(optSvgInput.value).then(() => {
          const orig = copyBtn.textContent;
          copyBtn.textContent = "Copied!";
          setTimeout(() => (copyBtn.textContent = orig), 1500);
        });
      });

      downloadBtn.addEventListener("click", () => {
        if (!optSvgInput.value) return;
        const blob = new Blob([optSvgInput.value], { type: "image/svg+xml" });
        const url = URL.createObjectURL(blob);
        const a = document.createElement("a");
        a.href = url;
        a.download = "optimized.svg";
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
        URL.revokeObjectURL(url);
      });

      // Init
      updateSizeInfo("", "");
    </script>
  </body>
</html>