Prompt Variable Filler
Paste a prompt template with {{variables}} in it — get a simple form to fill them in, and copy the finished prompt in one click.
Paste your prompt template
Your Finished Prompt
How to use this tool
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1
Paste your template. Write your prompt with placeholders wrapped in double curly braces, like {{topic}} or {{tone}}.
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2
Fill in the blanks. The tool automatically detects every unique variable and gives you a labeled box for each one.
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3
Copy your finished prompt. Click "Build Prompt" and every variable gets swapped in automatically — copy and use it.
About This Tool
If you use the same prompt structure over and over — a weekly email format, a content brief template, a code review checklist — retyping or manually editing it each time wastes minutes you don't need to lose. This tool lets you write the structure once with placeholders, then fill in just the parts that change.
It works entirely in your browser: type or paste a template, and every {{placeholder}} becomes its own input field automatically, in the order it first appears.
Frequently Asked Questions
What format do variables need to be in?
Wrap them in double curly braces, like {{name}} or {{topic}}. Anything inside the braces becomes the field's label.
What if I use the same variable twice?
It only creates one input field for it, and fills in every instance of that variable with the same value when you build the prompt.
Is my template saved anywhere?
No. Everything runs locally in your browser and disappears when you close the tab.
Does this work for any AI tool?
Yes — this just builds plain text. Use the finished prompt with Claude, ChatGPT, Midjourney, or anything else.