JSON Schema

JSON Schema is part of DevStudio — a free, in-browser collection of developer utilities that work without sign-up, installation, or any backend service. Infer schema and validate JSON data, all running entirely on your device. Because the page never uploads what you paste, you can run sensitive payloads, configuration files, secrets, or production data through it with confidence: nothing leaves your browser tab. Use JSON Schema for ad-hoc debugging, code review, log triage, release prep, learning a new format, or as a quick scratchpad while you build. If you use this tool a lot, pair it with JSONPath Evaluator, XPath Evaluator, GraphQL Toolkit, and the rest of the DevStudio toolkit for related developer workflows.

Related developer tools

• JSONPath Evaluator — Evaluate JSONPath expressions against JSON data — root/child/recursive descent/filters
• XPath Evaluator — Evaluate XPath expressions against XML documents — supports 1.0 syntax + namespace bindings
• GraphQL Toolkit — Schema-side companion to API Client: formatter, introspection tree, AST outline, codegen (TS / TS-resolvers / Java / fragment matcher) and a point-and-click query Explorer
• String Inspector — Escape strings, visualize whitespace, and inspect Unicode code points

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