JSON Validator

What is JSON Validator?

JSON Validator is a browser-based developer utility for check JSON syntax and locate parsing errors by line, column and character position. It keeps source data on the device for normal formatting, validation and conversion actions, so code and API payloads are not uploaded simply to process them. The workspace provides syntax-aware editing, keyboard access, file loading, copy and download controls, and clear errors designed for practical debugging rather than a generic failure message.

Check JSON syntax and locate parsing errors by line, column and character position. This makes it useful for API responses, configuration files, test fixtures and data exchanged between development systems.

How to use JSON Validator

1. Paste JSON, load the original sample, or choose a local .json or .txt file.
2. Choose the relevant action and review validation details before using the output.
3. Switch between code and tree views when structural inspection is useful.
4. Copy or download the result; enable input memory only when the document is not sensitive.

Features

• Local-first processing with UTF-8 and Unicode support
• CodeMirror editing with search, history and bracket matching
• Accessible validation status with line and column details
• Responsive code and tree views with dark-mode support

Example JSON input

{
  "project": "RankSmartTools",
  "environment": "production",
  "features": ["format", "validate", "convert"],
  "active": true,
  "release": null
}