Novelai Wildcard Extension is a free Chrome add-on developed by ai-rabbit. This extension enhances the NovelAI image generation page by adding a prompt input UI. With this extension, users can now use new syntax for emphasis and weakening, such as {example::3} which can be written as {{{example}}}. Additionally, a dynamic prompt feature has been added, allowing users to generate prompts like {ABAB|CCB|CBADB} which will randomly select one of the given options.

One of the standout features of this extension is the wildcard setting. By using the syntax W__Girl__W, users can create a random selection of words from a previously set list specific to the word "Girl". This wildcard feature adds an element of unpredictability and creativity to the generated prompts.

To use the extension, simply press `ctrl + G` in your browser to generate a prompt and copy it to the clipboard.

The latest update history includes adjustments to the UI, bug fixes related to wildcards, and the addition of English language support. Novelai Wildcard Extension is a valuable tool for users of the NovelAI image generation page, providing enhanced prompt generation capabilities.