NovelAI Prompt Helper

An assistant tool for creating complex prompts easily and flexibly on NovelAI's image generation page. Features include templates, wildcards, random selection, prompt variables, and a visual editor. Main features: - Templates: Save frequently used words and phrase combinations as "templates" and call them with a simple notation like T__templateName__T. - Wildcards: Using the W__wildcardName__W format, randomly pick one entry from a registered word list, or join the whole list comma-separated. Per-line weighting such as "2##red hair" is also supported. - Random selection: - {A|B|C}: Randomly picks one of A, B, or C. - {2##A|1##B}: Weighted random selection where A is twice as likely to be picked as B. - NovelAI's official || syntax passes through as-is, and a single pipe can be escaped as \|. - These notations can be nested and used inside templates and wildcards. - Named arguments (function-like templates): Pass arguments to templates and wildcards like T__cat($color: white)__T to dynamically replace $color placeholders in their content. Arguments can also be forwarded from one call to another. - Prompt variables: Write $color = black on its own line to provide a default value for every $color below it, including those inside template and wildcard content. - Prompt Builder: Visually edit branching syntax like {a|b} and weights in a nested block UI without writing text directly. Supports drag & drop of tags and search. - Expected-value preview: Check how random selections will expand (combinations and expected counts per choice) before generating. - Error checking: See undeclared variables, undefined templates/wildcards, mismatched {} braces, unclosed tags, and other syntax issues in a list — without expanding via Ctrl+G. - Tag Suggestions: Suggests tag suggestions while typing. Searches can also be performed from Japanese aliases. - Generate & copy with Ctrl+G: Press Ctrl+G to parse and expand your prompt source, and the finished prompt is automatically copied to the clipboard. It can optionally auto-paste into NovelAI's prompt fields, and supports automatic distribution to character prompts using the <> delimiter. - Prompt saving and management: Organize your prompts and reusable snippets in a folder structure. Supports multi-select drag & drop, sorting by name, and keyboard navigation. - Data persistence and backup: Your in-progress prompt, saved data, templates, and wildcards survive browser reloads. All settings can be exported to and imported from a JSON file for backup. How to use: - After installing the extension, open NovelAI's image generation page. - Click the "Open Prompt" button shown at the top of the screen to open the prompt input area. - Enter your prompt source in the input area using the special notations above. Frequently used prompts can be saved in a folder structure. - Press Ctrl+G to generate the prompt and copy it to the clipboard (it can also auto-fill NovelAI's prompt fields via Settings). - Customize templates and wildcards freely on the options page.