JSON ValidatorBrowser-local processing

AppHelp

Validate and pretty-print JSON locally

Paste JSON to check syntax, inspect the root type, and copy formatted output.

Valid JSON
Summary
object · 3 keys
{
  "name": "AppHelp",
  "local": true,
  "tools": 20
}

Common tasks

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Features

  • Validate JSON syntax
  • Show parse errors
  • Pretty-print valid JSON
  • Browser-local processing

Frequently asked questions

Is JSON Validator free?
Yes. JSON Validator is free to use in the browser with no signup.
Does my data leave the browser?
No. The tool is designed for browser-local processing by default.
What can I export?
Validate JSON and inspect parse errors locally in your browser.