JSON Formatter & Validator
Formatters & Validators100% Client-SideFormat, validate, beautify, and minify JSON with tree viewer and syntax highlighting.
Tab size:
Input JSON295 chars
Formatted Output
0 chars
SponsorNon-intrusive
What is JSON Formatter & Validator?
JSON Formatter & Validator is an essential online developer utility designed to clean up, indent, validate, and minify JavaScript Object Notation (JSON) strings. Whether you receive minified API responses or messy nested payloads, this tool provides instant error highlighting with line/column numbers, 2-space or 4-space indentation, and one-click copy.
How to Use Online
- 1Paste JSON PayloadPaste your raw or minified JSON string into the input editor.
- 2Validate & IndentSelect 2-space or 4-space indentation to instantly format and beautify.
- 3Check Syntax ErrorsInspect line and column error indicators if your JSON contains syntax issues.
- 4Copy or DownloadCopy the formatted JSON to clipboard or download it as a clean .json file.
Key Features
- Instant syntax validation with exact error position indicator
- Configurable indentation (2 spaces, 4 spaces, or Tab)
- Minify / Compact JSON to remove all unnecessary whitespace
- One-click copy to clipboard and file download
- Statistics: Character count, line count, and byte size
- 100% Client-side processing ensuring complete data privacy
Common Use Cases
- Debugging REST API request and response payloads
- Validating configuration files like package.json or tsconfig.json
- Minifying JSON payloads before production transmission
- Analyzing deep nested data structures cleanly
Frequently Asked Questions
No! All JSON formatting and validation happens 100% inside your browser using client-side JavaScript. Your data never leaves your machine.