Prompt Composer

Prompt Composer is a configurable Chrome extension for reviewing, formatting and reusing prompts directly inside compatible web editors. It adds a lightweight toolbar beside supported text areas and content-editable fields, helping users improve prompts without interrupting their existing workflow. Use this extension to improve the structure of your prompts, provide better instructions, and minimise context without losing essential meaning. The review tool identifies practical issues such as unclear tasks, missing output requirements, repeated instructions, conflicting length constraints and sensitive-looking values. Each finding can be expanded to show a possible solution. Prompts can also be converted into plain text, Markdown, JSON or YAML, with a preview shown before any changes are applied. Reusable snippets make frequently used instructions easier to manage. Users can create, search, edit, duplicate, enable, disable and delete their own snippets through the Chrome Side Panel. Snippets can include variables for selected text, the current prompt, page title, page URL and date, making them useful for code reviews, research, rewriting, summaries and other repeatable workflows. Prompt Composer includes optimized editor support for ChatGPT, Claude, Gemini and Perplexity, alongside generic support for compatible text area implementations. A website "allow" list is enabled by default, including popular AI tools besides market leading models. Users can add or remove individual hostnames or explicitly enable the extension across all websites. Prompt Composer is a tool by https://brownsmithdynamics.com, created to make everyday prompt workflows more structured, reusable and easier to manage. Refer to https://brownsmithdynamics.com/products/prompt-composer to learn more about the product and the developers.