Output utility

Did the output actually match the contract?

Check generated JSON, CSV, Markdown tables and lists against deterministic format, count, column and typed-field requirements.

Browser-only analysisNo API callsDeterministic diagnostics

Output contract / prompt

Constraints to verify

AI output

Response to validate

Results

Nothing is uploaded

⌁

Ready to analyze

Enter content on the left and run the deterministic checks.

What this tool actually checks

Supported v0.4.3 contracts

The parser recognizes JSON-only rules, typed JSON fields, exact/min/max item counts, RFC-style CSV, declared CSV columns, Markdown tables, numbered lists and bullet lists. Unsupported natural-language requirements are reported instead of guessed.

Why this matters

Generic JSON repair answers “can I parse this?”. This tool is aimed at a different question: “did the generated result satisfy the contract I asked for?”