Nofollow Link Highlighter

WHAT IT DOES

Nofollow Link Highlighter is a browser extension that scans any webpage for links with the rel="nofollow" attribute and highlights them with a visual indicator. It shows a list of all nofollow links with their text and URLs, and displays a count of nofollow versus dofollow links with percentages. You can toggle the feature on or off and choose whether to highlight nofollow links on the page. The tool is ideal for SEO professionals, content strategists, web developers, and anyone who wants to analyze the link profile of a webpage and identify nofollow links.

WHERE IT RUNS

Nofollow Link Highlighter 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 DOM for anchor elements with rel attributes. 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 highlighter. Toggle "Highlight nofollow links" to show a visual indicator (purple outline and label) on nofollow links. Click the "Scan" button to analyze the page. The panel displays a summary with total links, nofollow count, dofollow count, and percentages. Nofollow links are shown in purple, dofollow links in green. Click the "Export" button to copy a full report to your clipboard, including all nofollow and dofollow links with their text and URLs. All settings are saved per website.

REAL MECHANISM — WHY THIS WORKS

Most link analysis tools require manual inspection or external SEO tools that may not show real-time data. Nofollow Link Highlighter uses a DOM-scanning approach that reads the page's current link structure. The tool queries the page for all anchor elements with href attributes, then checks the rel attribute for the presence of "nofollow". It splits the rel attribute by whitespace and checks if "nofollow" is present, handling cases where rel contains multiple values (e.g., "nofollow sponsored" or "nofollow ugc"). Links are classified as nofollow if the rel attribute contains "nofollow", and dofollow otherwise. Results are displayed in a summary with counts and percentages, and a detailed list shows each link with its text, URL, and rel attribute. Nofollow links are highlighted on the page using CSS outlines with a purple color and a label. This approach ensures accurate, real-time, and fully private link analysis 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 the results. 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, enabled state, and highlight toggle—are saved per domain for a seamless experience.

PLEASE NOTE

Nofollow Link Highlighter 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 all links on the page at the time of the scan. Dynamically added links will be included in subsequent scans. The highlight feature adds visual indicators to nofollow links; these are purely visual and do not modify the page content. The export function copies a full report to the clipboard. All settings are stored locally in your browser using GM_setValue. No page content, link 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 link data at your request.