Prompt Variable Replacer
Fill in prompt templates with variables from a CSV — generate multiple prompts at once
About Prompt Variable Replacer
Fills a prompt template containing {{variable}} placeholders with values from CSV data and generates one prompt per data row, all in your browser. The first CSV row names the columns to match; with a single placeholder you can instead list one value per line and skip the header. Useful for building test sets, evaluation inputs or bulk variations of the same prompt.
Category: AI Tools.
Frequently asked questions
What is the CSV format for multiple rows?
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The first line is the header: variable names that match the {{placeholders}} in your template, written with unaccented letters, digits or underscores and no spaces inside the braces. Each following line is a data row that generates one prompt. Columns are split on every comma and quotes get no special treatment, so a value can't contain a comma.
What if my template has only one variable?
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If the placeholder appears once and the first line has no comma, every line is treated as a value and generates one prompt, with no header row. Don't add a header in this mode or it becomes a prompt of its own; a placeholder repeated in the template switches back to header-based CSV parsing.
How are multiple generated prompts separated?
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With a horizontal rule (---) and blank lines between each prompt, making the output easy to copy individual sections from.
What happens if a placeholder has no matching column?
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It stays in the output unchanged, such as {{tone}}, which makes missing columns easy to spot. If a row has fewer values than headers, the missing ones are replaced with an empty string, and extra columns without a matching placeholder are ignored.