Prompt Variable Extractor
Extract {{variables}} from prompts and generate a JSON values skeleton for reusable templates.
Last reviewed by the Radiatus Cloud team
Output
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Pull the variables out of a prompt template
Reusable prompt templates use placeholder variables, and building the data to fill them means knowing what they are. This tool extracts the variables from a prompt and generates a JSON values skeleton, so you have a ready structure to populate.
Why this helps templated prompts
A prompt template with placeholders becomes reusable when you can fill it programmatically, but first you need to know exactly which variables it contains and produce a matching data structure. Extracting the variables and generating a JSON skeleton with each as a key gives you that structure immediately, ready to fill with values. It removes the manual, error-prone step of reading through a template to list its placeholders, and it ensures the data you build matches the template exactly, which is where templated prompt systems usually break.
A skeleton to fill
The tool runs entirely in your browser, so nothing you paste, prompts, outputs or documents, is uploaded, which matters when the input is sensitive AI data or your own content.
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Frequently Asked Questions
What does it extract?
The placeholder variables from a prompt template, and it generates a JSON skeleton with each as a key, ready to fill with values.
Why generate a JSON skeleton?
So you have a data structure that matches the template exactly, ready to populate, without manually listing the placeholders yourself.
What problem does it solve?
The error-prone step of reading a template to find its variables, and the mismatches between template and data that break templated prompt systems.
How does it pair with a template builder?
You extract the variables here to get the skeleton, fill it with values, then render the template with those values.
Is my prompt uploaded?
No. The extraction runs entirely in your browser.
Privacy & Security
Processed locally in your browser. No data is sent to any server.
How to Use
Paste a prompt containing {{variables}} to extract variable names and build a template skeleton.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
Related Tools
AI Prompt Leakage Analyzer
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