JSON Schema to Zod

How to use this developer tool

1. Paste or upload the json schema you want to inspect.
2. Run Generate Zod Schema, or press Ctrl/Cmd + Enter.
3. Read the summary, diagnostics, and reported counts before using the output.
4. Copy the result or download it in the shown format.

What this developer tool does

The converter recursively maps supported JSON Schema keywords to chained Zod calls. Object properties become a z.object shape, missing required entries gain .optional(), and array items are converted with the same rules.

References, conditional schemas, unions built with oneOf/anyOf, and tuple-style items are reported as limitations rather than guessed.

Example

The Sample button loads a representative json schema. Running it produces the same kind of zod code shown in the result panel, including counts that are calculated from the supplied text rather than fixed examples.

{
  "type": "object",
  "properties": {
    "email": {
      "type": "string",
      "format": "email"
    },
    "age": {
      "type": "integer",
      "minimum": 0
    },
    "tags": {
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  },
  "required": [
    "email"
  ]
}

Use cases

• Review configuration changes before committing them.
• Diagnose format-specific problems in CI or deployment inputs.
• Create a copy-ready result for documentation or another developer tool.
• Check generated files without exposing project data to a remote service.

Tips for reliable output

• Start with the smallest input that reproduces a problem.
• Keep a copy of the original before replacing configuration files.
• Read warnings and limitations, even when the main result succeeds.
• Validate the output again with the parser used by your application.
• Use UTF-8 when saving downloaded text.

Processing details

Input is parsed with JSON.parse, then each schema node is visited once. Property, required-field, and node counts describe the source schema rather than the generated text.

Review schemas that use $ref, allOf, oneOf, anyOf, if/then/else, dependentSchemas, or custom formats; these keywords are not expanded by this browser-only converter.