Load real-world API payloads instantly into the editor and see the Zod schema generated live.
A standard Stripe payment event payload with nested object structures.
A typical GitHub REST API user profile response for public profile data.
A complex nested weather API response with coordinate and system objects.
A Slack Block Kit message payload with nested blocks and accessory elements.
Simply paste your raw JSON string or API payload into the left input pane. The tool instantly evaluates the nested object shapes and outputs a complete Zod schema in real-time — no sign-up, no server required. Your data never leaves your browser.
Zod is a TypeScript-first schema validation library. You define a schema once and Zod infers the static TypeScript type automatically via z.infer<typeof schema>. It is widely used with React Hook Form, tRPC, Next.js, and Hono for validating API responses, form inputs, and environment variables.
The converter outputs a complete Zod schema (e.g., z.object({ name: z.string(), age: z.number().int() })) exported as a named const, plus an exported TypeScript type derived from the schema via z.infer<typeof schema>. You can paste this directly into any .ts file.
Use z.infer: type MyType = z.infer<typeof mySchema>. This gives you a TypeScript type that always stays perfectly synchronized with your Zod schema, eliminating the need to maintain duplicate interface definitions.
A JSON null value produces z.null(). When you enable the 'Nullable' toggle, fields that may be null will instead use .nullable() on the base type — for example, z.string().nullable(). This is the correct Zod pattern for fields that may or may not contain data.
By default, z.object() allows unknown keys to pass through without error. Enabling Strict Mode appends .strict() to every object schema, which causes Zod to throw a runtime error if the validated data contains any keys not defined in the schema. This is ideal for secure API boundaries.
Yes, this is a very common and recommended pattern. Define a Zod schema for your .env variables and call schema.parse(process.env) at app startup. Any missing or invalid environment variables will throw a descriptive error immediately, rather than causing confusing runtime failures later.
Stop hand-writing Zod schemas from API responses. This free, instant, browser-based JSON to Zod schema generator transforms any JSON payload into a complete, production-ready Zod schema definition in milliseconds. Whether you're working with REST API responses, tRPC routers, Prisma seeds, or webhook events, this tool eliminates the tedious manual process and lets you focus on building.
The JSON to Zod schema generator runs 100% client-side using a recursive type-inference engine written in vanilla JavaScript. When you paste a JSON object into the left editor pane, the parser walks every key-value pair in your payload. Primitive values — strings, numbers, booleans, and nulls — map directly to their Zod equivalents (z.string(), z.number(), etc.). Nested objects are recursively expanded into properly shaped z.object() definitions. Arrays are inspected for element-type consistency: a uniform array becomes z.array(z.string()), while a mixed-type array becomes a z.union([...]).
The generated output is rendered in the right pane with full VS Code–style syntax highlighting. The tool converts JSON to Zod schemas in real time with zero round trips to a server.
Real-time generation. The online Zod schema generator updates the output on every keystroke. No buttons, no server, no wait time.
Strict Mode. Append .strict() to all generated z.object() schemas to reject unknown keys at runtime — essential for secure API boundaries.
Nullable and Optional toggles. Enable .nullable() for fields that may be null, or .optional() to make all properties optional — perfect for partial API responses.
One-click copy. Hit the Copy button and the full Zod schema is written to your clipboard, ready to paste directly into your .ts files in VS Code, WebStorm, or any editor.
Unlike server-based converters, this JSON to Zod converter performs all parsing and schema inference locally in your browser tab. Your JSON payloads — which may contain sensitive API keys, user records, or internal data structures — are never transmitted to any server. Generate Zod schemas from JSON safely, privately, and for free.