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Variable Extractor

Three tools in one: extract {{variables}} from templates, fill them with values, and browse 25+ ready-to-use templates.

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Extracted Variables

No variables found. Paste a template above to get started.

How it works

The tool scans your text for {{variable}} patterns using the regex:

/\{\{\s*([\w.-]+)\s*\}\}/g

Matches any word, dot, or hyphen characters [\w.-]+ inside double curly braces {{ }}, ignoring whitespace around the name. Malformed (unclosed) braces and nested patterns are automatically ignored.

Template Editor

Editor

Variables

0 found
No variables found — paste a template with {{variable}} placeholders.

Filled Preview

Preview 
Paste a template on the left to see the filled result here.
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How it works: Type {{variable_name}} placeholders in your template. The tool extracts them automatically and creates an input field for each unique variable. Fill in values on the left — the preview updates instantly on the right. Empty values keep the original {{variable}} placeholder intact.

Use cases: Email templates, blog post outlines, SQL query generators, code prompt templates, and any structured LLM prompt with dynamic parameters. 100% client-side — no data leaves your browser.
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Variables