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PromptifyLab

Prompt Chain Builder

Splits one overloaded prompt into a sequence where each step does one thing and hands a named artefact to the next. Six ready-made patterns — research to draft, extract to recommend, spec to review — or build your own, output as separate prompts, one combined prompt, or agent instructions.

The steps

Each step should do one thing and produce one named artefact the next step can use. If a step's output has no name, it is two steps.

    Your chain

    
      
    
    
    
  
    

  
    Nothing leaves your browser. Chains are built here, run wherever you like.
    

    




    How it works
    

      

    • Each step needs a name, an instruction and a named output. If you cannot name what a step hands on, it is not a step.
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    • Separate mode writes the prompts with the handover language between them, so you paste one at a time.
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    • Single mode writes one prompt that makes the model show its work at each stage.
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    • Agent mode writes it as instructions for a tool that runs steps itself.
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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.
    

      

    • Chains cost more and take longer. If one prompt works, use one prompt.
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    • An error in step two is invisible by step six. Keep chains short and check the intermediate output.
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    • It builds the chain; you run it.
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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
    

    

    When should I chain instead of using one prompt?
    When you need to check an intermediate result, or when combining two steps makes the output drift from its inputs — extraction followed by interpretation is the classic case.
    

    

    How many steps is too many?
    Beyond about five, errors early in the chain become hard to trace. If you need more, break it into two chains with a checkpoint between.
    

    

    


      

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      Chaining & Workflows
      

      Splitting work across steps, and knowing when one prompt is enough.
      

          7 prompts
  
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      Data Analysis
      

      Exploration, hypotheses and the analysis code you then actually run.
      

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