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JSON Schema Validator

Validate JSON against a JSON Schema online. Every error shows the exact property and why it failed, and clicking one jumps to that spot in your data.

JSON data

1

JSON Schema

1

Validation errors

Waiting for input
About this tool
A JSON Schema describes what valid data looks like: which properties are required, what type each value must be, which values are allowed, and how arrays and nested objects are shaped. This validator checks your JSON against a schema you provide and reports every violation, not just the first one.
What a JSON Schema can check
Schemas can require properties, restrict values to a type, an enum or a number range, limit string length, and describe the items allowed in an array. Nested objects are checked recursively, so the error path tells you exactly where in the document the problem is.
Common validation errors
These are the errors you will see most often and what they mean.
type                   "29" is a string, but the schema expects an integer
required               the object has no "email" property
enum                   "owner" is not one of admin, editor, viewer
additionalProperties   "extra" is not defined in the schema
minimum                -1 is below the minimum of 0
How to use it
  1. Paste your JSON data in the left box and your JSON Schema in the right box.
  2. Each violation is listed with its property path and the reason, such as "must be integer" or "missing required property email".
  3. Click an error to jump to that property in your data, fix it, and the list updates instantly.
Frequently asked questions
Which JSON Schema versions are supported?
Draft-07 (the default), 2019-09 and 2020-12. The version is chosen from the $schema keyword in your schema.
Is my data uploaded?
No. Validation runs in your browser.
What does additionalProperties: false do?
It rejects any property that is not listed under properties, which is a quick way to catch misspelled keys.
Need something simpler? Try the JSON Validator or the JSON Formatter on jsonchecker.in.
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Basic JSON tools on jsonchecker.in
JSON ValidatorCheck JSON and find errors by line and column.JSON FormatterPretty print or beautify JSON.JSON MinifierCompress JSON to a single line.JSON EditorEdit, sort, find and replace.JSON Diff CheckerQuick compare of two JSON files.JSON to CSVConvert JSON arrays to CSV.CSV to JSONConvert CSV rows to JSON.JSON to YAMLConvert JSON to YAML.YAML to JSONConvert YAML to JSON.JSON Tree ViewerExplore JSON as a tree.