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.
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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
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JSON to Python Dataclass Generator — Free Online Tool
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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.
JSON to XML Converter — Convert JSON to XML Online Free
Convert JSON to well-formed XML using AI. Generates valid XML with proper tags, nesting, and attributes from any JSON object or array. Free, no sign-up.
JSON to HTML Table Converter — Free Online Tool
Convert a JSON array to a styled HTML table using AI. Generates semantic <table> markup with <thead>, <tbody>, and proper <th>/<td> elements. Free, no sign-up.
YAML to JSON Converter — Convert YAML to JSON Online Free
Convert YAML to valid JSON using AI. Handles anchors, aliases, multi-line strings, and complex YAML structures. Outputs properly formatted JSON. Free, no sign-up.
XML to JSON Converter — Convert XML to JSON Online Free
Convert XML to JSON using AI. Handles attributes, nested elements, arrays, CDATA sections, and mixed content. Outputs clean, valid JSON. Free, no sign-up.
JSON to JSON Schema Generator — Free Online Tool
Generate a JSON Schema (Draft 7) from any JSON object using AI. Infers types, required fields, nested object schemas, and array item types automatically. Free, no sign-up.
JSON to GraphQL Schema Generator — Free Online Tool
Generate a GraphQL schema (SDL) from any JSON object using AI. Creates type definitions with proper scalar types, nested types, and list fields. 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.
JSON to C# Class Generator — Free Online Tool
Convert JSON to C# class definitions with proper types, nullable annotations, and JsonProperty attributes using AI. Free, no sign-up.
JSON to Java Class (POJO) Generator — Free Online Tool
Convert JSON to Java POJO class definitions with proper types, getters, setters, and Jackson annotations using AI. Free, no sign-up.
JSON to Kotlin Data Class Generator — Free Online Tool
Convert JSON to Kotlin data class definitions with proper types, nullable fields, and kotlinx.serialization annotations using AI. Free, no sign-up.
JSON to Rust Struct Generator — Free Online Tool
Convert JSON to Rust struct definitions with serde Deserialize/Serialize derives and proper types using AI. Free, no sign-up.
JSON to PHP Array Converter — Free Online Tool
Convert JSON to PHP associative array syntax with proper types and nested structure using AI. Free, no sign-up.
CSV to JSON Converter — Free Online Tool
Convert CSV data to a JSON array using AI. Handles headers, quoted fields, commas in values, and mixed types. Free, no sign-up.
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Utility tools that run entirely in your browser — no data sent to any server.
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Base64 Decoder
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URL Encoder
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URL Decoder
Decode percent-encoded URL strings back to readable text.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
HTML Entity Encoder
Convert special characters to HTML entities for safe markup.
HTML Entity Decoder
Decode HTML entities back to their original characters.
Regex Tester
Test and debug regular expressions with real-time match highlighting and capture group details.
JSON in Every Language
Code examples for parsing and generating JSON in Python, JavaScript, Go, Java, PHP, and more.
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Frequently Asked Questions
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