API JSON Workbench
Paste JSON once, then format, validate, compare, generate types, infer schema, and create mock data in a focused API developer workspace.
JSON FormatterFormat, validate, and minify JSON locally in your browser.JSON DiffCompare two API responses and inspect structural changes.JSON to TypeScriptGenerate TypeScript types from real API response samples.JSON Schema GeneratorInfer JSON Schema from sample payloads.Mock Data GeneratorCreate mock JSON that follows your API data shape.
Saved snapshots
Snapshots are saved only when you choose Save. They stay in this browser and are never uploaded.
No saved snapshots yet. Use Save in any tool when you want to keep a local copy.