Shipping Cost Tracker

WHAT IT DOES

Shipping Cost Tracker is a browser extension that scans any webpage for shipping costs and delivery information. It displays a summary of shipping options, costs, and estimated delivery times. The tool highlights free shipping options with a green badge and shows the lowest available shipping cost. A list of all shipping options found on the page is displayed with tags for cost, free shipping, and delivery time. The tool helps online shoppers quickly identify the best shipping options without manually searching through the page. It is ideal for shoppers, price-conscious buyers, and anyone who wants to compare shipping costs across different products or stores.

WHERE IT RUNS

Shipping Cost Tracker runs on any webpage, overlaying a floating panel that does not interfere with page content. It operates entirely in your browser as a lightweight userscript, scanning the page for shipping-related text. It works on any page, whether static or dynamic, with no external dependencies. All settings are stored locally using GM_setValue—no data is ever sent to any server.

HOW TO USE

After installation, open the floating panel by clicking the extension icon. The panel shows the current status (Enabled or Disabled) and a toggle button to enable or disable the tracker. The panel displays a summary with the number of shipping options found, free shipping availability, and the lowest shipping cost found. A list shows each shipping option with tags for cost, free shipping, and delivery time. Click the "Scan Shipping" button to manually rescan for shipping information. The tool automatically rescans when the page content changes. All settings are saved per website.

REAL MECHANISM — WHY THIS WORKS

Most shipping cost tracking tools require manual inspection of the page or copying information into a separate tool. Shipping Cost Tracker uses a DOM-scanning approach that directly reads shipping-related text from the page. The tool traverses the DOM using a TreeWalker to find text nodes containing shipping-related keywords ("shipping", "delivery", "postage", etc.) or currency patterns. It also searches for elements with shipping-related class or ID names. The tool extracts shipping costs using regular expressions, detects free shipping by looking for "free", "0.00", or "$0" patterns, and identifies delivery time using patterns like "2-3 days", "within 5 business days", etc. Each shipping option is parsed and stored with its cost, free shipping status, currency, and delivery time. Results are displayed with a summary (number of options, free shipping count, lowest cost) and a detailed list. A MutationObserver detects dynamically added shipping information and rescans automatically. This approach ensures accurate, real-time, and fully private shipping cost tracking without requiring any external services or network access.

THE PANEL

The floating panel is fully draggable and remembers its position per site, snapping to the edges of the viewport when dragged near them. You can collapse the panel to a small icon to minimize screen distraction and expand it back with a single click. The panel is resizable from the bottom-right corner, giving you more space to view shipping options. Press the Escape key to close the panel instantly. The panel remains open across page navigation within the same domain, maintaining your current view state. All preferences—panel position and enabled state—are saved per domain for a seamless experience.

PLEASE NOTE

Shipping Cost Tracker requires the free BotGentz extension to be installed and enabled, as it relies on the cross-extension messaging API provided by BotGentz for DOM access permissions. The tool scans for shipping-related text patterns and may not detect all shipping information on all websites. The lowest cost shown is the lowest numeric value found; it does not account for different shipping methods or conditions. Free shipping detection is based on text patterns and may have false positives. All settings are stored locally in your browser using GM_setValue. No page content, shipping data, or usage information is ever sent to any server. The extension does not read, store, or transmit any personal information. It only scans and displays shipping information at your request.