Output Contract Tester
Validate AI output against a contract (JSON structure, required keys, forbidden phrases, and length limits).
Contract JSON error: Unexpected end of JSON input
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Validation results
Add contract and output to validate.
About This Tool
Output Contract Tester enforces deterministic output requirements before automation or downstream parsing.
Frequently Asked Questions
Can this replace schema validation APIs?
It is a fast client-side precheck and does not replace full server-side validation.
What contract fields are supported?
JSON flag, key constraints, required terms, forbidden patterns, and word limits.
Is output uploaded?
No. Validation runs locally in your browser.
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Before This Tool
JSON Output RepairerRepair malformed AI JSON outputs and recover parser-safe structured data.JSON Output GuardValidate AI JSON outputs against schema before downstream parsing or automation.Agent Safety ChecklistAudit agent runbooks for allowlists, confirmation gates, budgets, fallbacks, and logging.
Next Step Tools
JSON Output GuardValidate AI JSON outputs against schema before downstream parsing or automation.Function Calling Schema TesterTest tool-call arguments against function schema and catch validation failures early.AI Reliability ScorecardScore prompt quality, safety, output contract fit, and replay-test risk before release.