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PromptifyLab

Prompt Templater

Paste a prompt containing [VARIABLES] and it builds you a form. Fill it in once, or switch to batch mode, paste a CSV, and get one filled prompt per row — useful for product descriptions, outreach, or anything you run many times with different inputs.

Mark the parts that change with square brackets and capitals: [PRODUCT], [AUDIENCE], [WORD COUNT]. Every prompt in the PromptifyLab library is already written this way.

Filled prompt


      

    

  


  
Nothing leaves your browser. Customer names, product data and anything else you paste stays on this device.







How it works


    

  • It finds every [VARIABLE] in your template and generates a labelled field for each.
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  • Batch mode takes a CSV with a header row matching your variable names and fills one prompt per row.
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  • It tells you which columns are missing and which variables are still empty.
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  • Download the whole batch as a text file.
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What it does not do


Every tool on this site says this plainly, because a tool that pretends to do more than it does costs you more than it saves.


    

  • Variables must be in capitals inside square brackets — that is the convention every prompt in our library uses.
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  • It fills templates; it does not run them. Take the output to your model.
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  • Batch prompts still need checking. A hundred filled templates is a hundred chances for a wrong field.
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Nothing you type here leaves your browser


There is no account, no server and no logging. The whole tool is JavaScript running on your own machine — close the tab and it is gone. You can check: open your browser’s network tab and use it.




Questions people ask




How do I mark a variable?
Square brackets and capitals: [PRODUCT], [WORD COUNT], [MAIN BENEFIT]. Every prompt in the PromptifyLab library already uses this.




Can I use it with a spreadsheet?
Yes. Export the columns you need as CSV with a header row matching your variable names, and paste it into batch mode.








Free, no sign-up. Last updated 18 September 2026.