Payload Gate — CSV, JSON and webhook validator
Check files, API payloads and webhooks against a declared format before they reach the other system.
Declare the format a receiving system accepts (fields, types, required, maximum lengths, allowed values), then check what you send against it. The CSV validator and the JSON validator run in your browser and report every problem with its row, field and reason. The schema diff compares two versions of a format and marks the changes that break existing senders. The validation endpoint gives you an address of your own: every call is checked, answered at once with the exact refusal reason, and kept in a journal. No account needed. English and French.
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