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
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JSON to YAML Converter — Convert JSON to YAML Online
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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
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JSON to Markdown Table Converter — Free Online Tool
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JSON to XML Converter — Convert JSON to XML Online Free
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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.
JSON to Dart Class Generator — Free Online Tool
Convert JSON to a Dart class with final fields, a fromJson factory constructor, and a toJson method using AI. Instant, free, no sign-up required.
JSON to Swift Struct (Codable) Generator — Free Online
Convert JSON to a Swift struct conforming to Codable with CodingKeys enum where field names differ from Swift conventions using AI. Free, no sign-up.
JSON to Terraform HCL Variables Converter — Free Online
Convert JSON to Terraform HCL variable blocks and locals definitions using AI. Maps JSON types to Terraform types automatically. Free, no sign-up required.
JSON to Mongoose Schema Generator — Free Online Tool
Convert JSON to a Mongoose Schema definition with correct types, required fields, and default values using AI. Ideal for MongoDB/Node.js projects. Free, no sign-up.
JSON to Prisma Schema Model Generator — Free Online
Convert JSON to a Prisma schema model with correct field types, @id, @default, and @map directives using AI. For PostgreSQL, MySQL, and SQLite. Free, no sign-up.
JSON to Protocol Buffer (proto3) Generator — Free Online
Convert JSON to a Protocol Buffer proto3 message definition with correct field types and field numbers using AI. Free, no sign-up required.
JSON to TOML Config Format Converter — Free Online Tool
Convert JSON to TOML configuration format using AI. Produces clean TOML with correct sections, arrays of tables, and inline tables for nested objects. Free, no sign-up.
TOML to JSON Converter — Convert TOML to JSON Online Free
Convert TOML configuration files to valid JSON using AI. Handles sections, arrays of tables, inline tables, multi-line strings, and all TOML value types. Free, no sign-up.
JSON to Apache Avro Schema Generator — Free Online Tool
Convert JSON to an Apache Avro schema in JSON format with namespace, type, and fields definitions using AI. Supports null unions and nested records. Free, no sign-up.
JSON to OpenAPI 3.0 Schema Component — Free Online Tool
Convert JSON to an OpenAPI 3.0 schema component (components/schemas section) with correct types, required fields, and nested $ref definitions using AI. Free, no sign-up.
JSON to R Data Frame Code Generator — Free Online Tool
Convert JSON to R code that creates a tibble or data.frame using AI. Handles nested arrays, type coercion, and proper R syntax for immediate use in RStudio. Free, no sign-up.
JSON to Lua Table Syntax Converter — Free Online Tool
Convert JSON to Lua table syntax using AI. Produces idiomatic Lua tables with correct string quoting, nested tables, and array-style integer keys. Free, no sign-up.
JSON to Zod Schema (TypeScript) Generator — Free Online
Convert JSON to a Zod schema in TypeScript using z.object(), z.string(), z.number(), z.boolean(), and z.array() using AI. Free, no sign-up required.
JSON to Scala Case Class with Circe Codec — Free Online
Convert JSON to a Scala case class with circe automatic codec derivation or play-json Format using AI. Handles nested types and Option fields. Free, no sign-up.
JSON to PowerShell Hashtable Converter — Free Online Tool
Convert JSON to PowerShell hashtable or PSCustomObject syntax using AI. Handles nested objects, arrays, nulls, and booleans with correct PowerShell syntax. Free, no sign-up.
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HTML Entity Decoder
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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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Frequently Asked Questions
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