AI Prompt Tools

Validate Prompt Variables
Before They Break Production

Parse prompt templates, extract variables, and run validation tests across hundreds of input combinations. Catch undefined variables, type mismatches, and edge cases before your users do.

Start Validating — $19/mo

No credit card required for trial. Cancel anytime.

Variable extractionEdge case testingType mismatch detectionBatch test casesDetailed reports

Pro Plan

Everything you need to ship reliable prompts

$19/mo

Billed monthly. Cancel anytime.

  • ✓ Unlimited prompt templates
  • ✓ Auto variable extraction
  • ✓ Batch test case runner
  • ✓ Missing variable reports
  • ✓ Type mismatch alerts
  • ✓ Edge case detection
  • ✓ Export results as JSON/CSV
Get Started

Frequently Asked Questions

What prompt formats are supported?

We support all major variable syntaxes including {{variable}}, ${variable}, and {variable} used in LangChain, OpenAI, and custom templates.

How does batch testing work?

Upload a CSV or JSON file with test cases. The validator runs each case against your template and flags any missing variables, null values, or type mismatches in a detailed report.

Can I integrate this into my CI/CD pipeline?

Yes. Pro subscribers get API access to run validations programmatically and block deployments when prompt tests fail — just like unit tests for your prompts.