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Prompt Variable Generator

Reuse one good prompt for many inputs. Write a template with {{variables}}; the tool finds them and shows a field for each, and fills in the prompt as you type. To create many prompts at once, open the CSV section and paste a table whose header row names the variables – every row becomes a filled prompt, exported as text separated by ---, as JSONL for batch APIs or as a CSV with a prompt column.

  • Runs in your browser
  • No sign-up
  • Free to use

Write variables as {{name}}. Each one gets a field below.

Fill many at once from CSV

Filled prompt

How to use Prompt Variable Generator

  1. Write a template with {{variables}}.
  2. Fill the fields for one prompt.
  3. Or paste a CSV for many prompts.
  4. Copy or download the result.

Prompt Variable Generator features

Automatic fields

One per variable.

CSV batches

Up to 5,000 rows.

Three exports

Text, JSONL, CSV.

Missing checks

Unfilled variables and columns.

Copy or download

One click to the clipboard or a .txt file.

Private

Built in your browser; nothing is sent to an AI service.

When to use Prompt Variable Generator

  • Product descriptions for a catalogue.
  • Personalised emails.
  • Batch API jobs.
  • Evaluation datasets.

Prompt Variable Generator FAQ

What is JSONL?

One JSON object per line – the format many batch AI APIs accept.

How should the CSV look?

First row: variable names; each further row: one set of values. Quoted cells may contain commas.

What if a column is missing?

The tool warns and leaves that {{variable}} in the prompt.

Is my data uploaded?

No, everything happens in your browser.

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Templates scale prompts

Once a prompt works, the fastest way to use it at scale is a template: the instructions stay fixed while product names, audiences or facts change per row.

Keep values short and factual; the template carries the instructions.

This tool does not call an AI model. It turns your answers into a well-structured prompt in your browser, so it costs nothing, works offline once loaded and never sends your text anywhere. Paste the result into ChatGPT, Claude, Gemini, Copilot or any other assistant, or into the system message of an API call.

Good prompts are specific about the task, the context the model cannot know, the audience and the shape of the answer. The fields on this page cover exactly those parts; leave optional fields empty when they do not apply, and the prompt stays short.

Review the answer you get: language models can be confidently wrong, especially about facts, numbers, names and recent events. Ask for sources or mark claims to check, and keep personal or confidential data out of prompts unless your organisation allows it.

Keep the prompts that work. A small library of tested prompts – with a note on which model and settings they were used with – saves time and makes results more consistent across a team. The other prompt tools on this site help you format, template, fill and measure them.

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