Bookmarklet Maker

A bookmarklet is a small JavaScript program stored as a browser bookmark that, when clicked, performs actions such as changing the appearance of the current page, searching for selected text, extracting data from a table, etc. Bookmarklet Maker is the simplest tool available to create or customize bookmarklets.

Tips and Tricks

• If the bookmarks bar is not showing, simply open the View menu and select Always Show Bookmarks Bar.
• If the favorites bar is not showing, simply open the View menu and select Always Show Favorites Bar.
• If the bookmarks toolbar is not showing, simply open the View menu, select Toolbars, then Bookmarks Toolbar, and finally Always Show.
• If the bookmarks bar is not showing, simply open the View menu and select Show Bookmarks Bar.
• If the favorites bar is not showing, simply open the View menu and select Show Favorites Bar.
• As an example, here is the code for a bookmarklet that toggles dark mode on the current page:

  const style = document.documentElement.style;
  
  if (/invert/.test(style.filter)) {
    style.filter = '';
  } else {
    style.filter = 'invert(0.9)';
  }

• On certain browsers, the height of the code area can be altered by moving its bottom right corner in an upward or downward direction.
• You can generate a link to this page with the current bookmarket pre-loaded.

Related Tools

• Data URI Generator
• Dark Mode Bookmarklet
• Wayback Machine Bookmarklet