How to Create a Bookmarklet:

Step 1: Prepare Your JavaScript Code Add javascript: at the beginning of your script.

Step 2: Create a Bookmark Open your browser and navigate to any webpage (it's just a placeholder). Bookmark the page: Chrome & Firefox: Click the star icon in the address bar. Safari: Click Bookmarks > Add Bookmark. Edge: Click the three dots (...) > star icon.

Step 3: Edit the Bookmark Open your bookmarks manager: Chrome: Press Ctrl+Shift+O (or Cmd+Shift+O on Mac). Firefox: Press Ctrl+Shift+B (or Cmd+Shift+B on Mac). Safari: Bookmarks > Edit Bookmarks. Edge: Three dots (...) > Favorites > Manage favorites. Locate the bookmark you just added. Edit it: Right-click the bookmark > Edit. Change the bookmark's name to something you'll remember. Replace the URL with your javascript: prefixed code from Step 1.

Step 4: Execute the Bookmarklet Click on the bookmarklet whenever you're on a webpage to execute your JavaScript code.

Note: Always use bookmarklets responsibly and be aware that some websites might have security measures preventing them from running.