enhanced_encryptionBase64text_fieldsCase ConverterarticleCharacter CounterpaletteColor PickerimageImage Converterdata_objectJSON FormatterpublicMy IPpercentPercent Calculatorqr_code_2QR CodetimerTimerstraightenUnit ConverterlinkURL EncoderfingerprintUUID Generator
data_objectJSON Formatter
Waiting for JSON input...
ℹ️ Help

JSON Formatter is a free online tool that nicely formats complex JSON data and validates syntax. It automatically applies indentation to make data structures easy to visualize, and identifies error locations and details if there are syntax errors.

Useful when analyzing API response data, modifying configuration files (package.json, tsconfig.json, etc.), or understanding the structure of complex JSON objects. You can also use the minify function to remove whitespace and reduce file size. An essential tool for web and backend developers.

Instruction

JSON Formatter, Validator & Minifier

The JSON Formatter is a powerful toolkit for software engineers and data scientists, designed to parse, validate, beautify, and minify JSON (JavaScript Object Notation) data. It transforms unreadable raw data into structured, easy-to-read trees, or compresses it for efficient transmission.

Understanding JSON: The Language of the Web

JSON is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. Originally specified by Douglas Crockford in the early 2000s, it has replaced XML as the de-facto standard for data exchange on the web (REST APIs, GraphQL, NoSQL databases like MongoDB).

Strict Syntax Rules

Unlike standard JavaScript objects, JSON is very strict. Keys must be enclosed in double quotes. Single quotes are forbidden. Trailing commas (a comma after the last item in a list) are invalid. Comments are not supported. This tool automatically detects these common syntax errors and provides precise line numbers, helping you debug API responses that fail to parse.

Features & Usage

  • Instant Validation: As you type or paste content, the tool analyzes the structure. If valid, it formats it. If invalid, it highlights the error location. This immediate feedback loop drastically reduces debugging time.
  • Beautify (Pretty Print): Raw JSON from server logs is often a single line of millions of characters. "Beautify" applies proper indentation (2 spaces, 4 spaces, or Tabs) and newlines to make the hierarchy visual and understandable.
  • Minify (Compress): For production environments, every byte counts. "Minify" removes all unnecessary whitespace, newlines, and indentation. This can reduce payload size by 20-30%, resulting in faster API response times and lower bandwidth costs.
  • Tree View: (Coming soon) Visualize deep nested objects as an expandable/collapsible tree structure to navigate complex datasets easily.

Common Use Cases

Developers use this tool daily to: inspect API responses from Postman or Network tabs; configure `settings.json` files for IDEs like VS Code; format database dumps for readability; and validata data before sending it to a backend server.

grid_view
13:44
2025-12-28