Prompt Template Builder
Write a prompt with {{variable}} placeholders, fill each one in a form, and copy the finished prompt. Everything runs in your browser.
{{variable}} so you can see what is still missing.About the Prompt Template Builder
The Prompt Template Builder turns a reusable prompt into a fill-in form. Write your prompt with {{variable}} placeholders, and the tool detects each one and gives you a labeled input. As you type values, it builds the final prompt for you to copy. It is built for anyone who reuses prompts with small changes: support replies, content briefs, code review requests, or batch instructions. Everything runs in your browser, so your prompts stay on your machine.
How it works
- Write your prompt in the template box and mark each fillable part as {{variable}}, for example Write a {{tone}} email to {{name}}.
- The tool reads the distinct variable names and shows a labeled input for each one.
- Type a value for each variable; the output box updates live with your values filled in.
- Click Copy to grab the finished prompt.
Features
- Auto-detects distinct {{variable}} names as you type the template.
- One labeled input per variable, with repeated variables filled everywhere from a single field.
- Live output that updates on every keystroke.
- Unfilled placeholders stay visible as {{variable}} so you can see what is still missing.
- One-click copy of the finished prompt, all client-side.
Frequently asked questions
How do I mark a variable in the template?
Wrap the name in double curly braces, like {{name}} or {{product_name}}. Each distinct name gets its own input. The same variable can appear many times and is filled from one field.
What happens to variables I leave blank?
If a variable has no value, its placeholder stays visible in the output as {{variable}}. This makes it easy to spot what you still need to fill before sending the prompt.
Can I use the same variable more than once?
Yes. List {{name}} as many times as you need. The tool shows one input for it and replaces every occurrence with the value you type.
What characters can a variable name contain?
Letters, numbers, underscores, hyphens, and spaces inside the braces. Names are matched exactly, so {{first name}} and {{firstname}} are treated as different variables.
Is my prompt sent anywhere?
No. The template, your values, and the output are processed entirely in your browser. Nothing is uploaded or logged.