JSONToTable

JSON to F# Converter

Convert JSON data to F# record types and classes

JSON Input

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F# Output

F# code will appear here

Paste JSON in the input area to get started

How to Convert JSON to F# Record Types - Step by Step Guide

Step 1

Input Your JSON Data

Start by adding your JSON data that needs to be converted to F# record types. The tool analyzes the structure to generate appropriate record types with immutable properties.

Example: Try This JSON Data

Copy and paste this JSON example to see how it works: 🔥

{
  "userId": 12345,
  "username": "fsharpdev",
  "email": "dev@fsharp.org",
  "isActive": true,
  "preferences": [
    "functional_programming",
    "immutability",
    "pattern_matching"
  ],
  "profile": {
    "firstName": "F#",
    "lastName": "Developer",
    "age": 31,
    "country": "Denmark"
  }
}
Step 2

Configure F# Options

Customize how your JSON is converted to F# record types! ⚙️ Choose immutable properties and functional programming patterns.

•
Record types: Generate immutable F# record types with structural equality and pattern matching
•
JSON libraries: Compatible with Newtonsoft.Json and System.Text.Json
•
Nested types: Handle complex JSON hierarchies with nested F# record types
•
Type mapping: Automatic F# type mapping from JSON data types
Step 3

Get Generated F# Code

Watch the transformation! ✨ Your JSON structure becomes clean, functional F# record types ready for .NET development.

F# Code Output

Your JSON becomes these F# record types:

open Newtonsoft.Json

type Profile = {
    FirstName: string
    LastName: string
    Age: int
    Country: string
}

type Root = {
    [<JsonProperty("userId")>]
    UserId: int
    Username: string
    Email: string
    [<JsonProperty("isActive")>]
    IsActive: bool
    Preferences: string[]
    Profile: Profile
}
Step 4

Copy or Download F# Code

Perfect! Now you can use your F# record types in your .NET applications for JSON processing. 🚀

•
Copy to clipboard for immediate use in your F# projects
•
Download .fs files for integration into your .NET project
•
Use with frameworks like Giraffe and Suave
•
.NET applications and functional programming

What is JSON to F# Conversion? 🔥

JSON to F# conversion transforms JSON data structures into F# record types with immutable properties for functional programming on the .NET platform. This process analyzes JSON structure and generates F# record types that can serialize and deserialize JSON data, making it easy to work with APIs in F# applications.

The generated F# record types include proper field types, JsonProperty attributes for field mapping, structural equality, and compatibility with .NET JSON libraries, enabling type-safe JSON handling in functional .NET applications.

Frequently Asked Questions

What F# features are generated for JSON handling?

The tool generates F# record types with immutable properties, JsonProperty attributes for field mapping, structural equality, pattern matching support, and compatibility with Newtonsoft.Json and System.Text.Json libraries.

Can I use the generated types with .NET applications?

Absolutely! The generated F# record types work perfectly with .NET applications and can interoperate seamlessly with C# code. They integrate with ASP.NET Core, Entity Framework, and other .NET frameworks for web and desktop applications.

How are nested JSON objects handled in F#?

Nested JSON objects become separate F# record types with proper relationships. The tool creates a type hierarchy that mirrors your JSON structure, with parent record types containing properties of child record types.

What F# data types are used for JSON values?

JSON strings become F# string, numbers become int/float, booleans become bool, arrays become arrays or lists, and objects become custom record types. The tool intelligently maps JSON types to appropriate F# types.

Do the generated record types support pattern matching?

Yes! F# record types support full pattern matching, allowing you to destructure data, match on specific values, and use active patterns for robust data processing in functional style with compile-time safety.

Is the JSON to F# converter free to use?

Yes, completely free with no limitations on JSON complexity, record type generation, or usage frequency. No registration required, and you can generate unlimited F# record types from JSON data at no cost.