JSON Formatter & Beautifier
Paste your JSON to format, beautify, minify, and validate it instantly. Free, no ads, no sign-up.
What is a JSON Formatter?
A JSON formatter is a free online tool that takes raw or minified JSON text and restructures it into a human-readable layout with consistent indentation and line breaks. JSON (JavaScript Object Notation) is a lightweight data-interchange format widely used in APIs and web applications — but minified JSON is difficult to read and debug. A formatter adds whitespace and nesting to reveal the structure clearly.
jsondecode.com's formatter runs entirely in your browser. No JSON data is ever sent to a server, which makes it safe for use with sensitive or proprietary data. It also validates your JSON and highlights the exact error line when a syntax mistake is detected.
How to Format JSON Online
- 1Paste your JSON — Copy your JSON text and paste it into the input box on the left.
- 2Click Beautify or Minify — Beautify adds indentation for readability; Minify removes whitespace to reduce size.
- 3Review errors — If the JSON is invalid, the error line is highlighted in red and the error message appears below the editor.
- 4Copy the output — Click Copy to copy the formatted JSON to your clipboard.
AI-Powered JSON Conversion Tools
Go beyond formatting — convert your JSON into other schemas and code formats using GPT-4o mini.
JSON to BigQuery Schema Converter — Free Online Tool
Convert JSON to a Google BigQuery schema definition using AI. Generates typed field definitions with NULLABLE modes instantly. Free, no sign-up.
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JSON to Go Struct with BSON Tags — Free Online Tool
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JSON to TypeScript Interface Generator — Free Online
Generate TypeScript interface definitions from any JSON object using AI. Creates typed interfaces with optional fields, union types, and nested types. Free.
JSON to YAML Converter — Convert JSON to YAML Online
Convert JSON to YAML format using AI. Produces clean, human-readable YAML with 2-space indentation and block style. Works with any valid JSON input. Free, no sign-up.
JSON to CSV Converter — Export JSON Array to CSV Free
Convert a JSON array to CSV format using AI. Generates headers from keys, handles nested objects with dot notation, and escapes values correctly. Free, no sign-up.
JSON to Python Dataclass Generator — Free Online Tool
Convert JSON to Python dataclass definitions with type annotations using AI. Generates @dataclass code with Optional, List, and snake_case field names. Free.
JSON to SQL INSERT Statement Generator — Free Online
Generate SQL INSERT statements from JSON data using AI. Works with MySQL, PostgreSQL, and SQLite. Handles arrays, nested objects, and null values. Free, no sign-up.
JSON to Markdown Table Converter — Free Online Tool
Convert a JSON array to a formatted Markdown table using AI. Generates aligned columns with header rows. Works with any flat or nested JSON array. Free, no sign-up.
Ruby to JSON Converter — Convert Ruby Hashes to JSON Online
Convert Ruby hashes, arrays, symbols, booleans, and nil values to JSON using AI. Generates valid JSON with double quotes and proper null, true, and false values. Free, no sign-up.
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HTML Entity Decoder
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Regex Tester
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JSON in Every Language
Code examples for parsing and generating JSON in Python, JavaScript, Go, Java, PHP, and more.
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TypeScript, JSON, CSS, and HTML converters at js2ts.com.
Frequently Asked Questions
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