OnlineToolYardFAST & PRIVATE

JSON to Python Converter — Generate Dataclasses Online

Convert a JSON object to Python dataclasses with from_dict, to_dict, and Optional typing.

🔒 All processing happens in your browser. Your JSON is never uploaded or sent to any server.

How to Use

  1. Paste a valid JSON object into the left pane. Supports JSON5 syntax (trailing commas, single quotes, comments).
  2. Optionally change the Root Class Name — this becomes the outermost Python dataclass name. Nested object classes are named after their JSON key automatically.
  3. Click Convert to generate the Python dataclass. The Monaco editor on the right shows the result with syntax highlighting.
  4. Click Copy Result and paste the code into your Python project. The imports are included at the top.

Frequently Asked Questions

Related Tools

JSON & DataJSON to Dart Converter

Convert a JSON object to a Dart class with fromJson, toJson, and null-safe fields.

JSON & DataJSON to TypeScript Converter

Convert a JSON object to TypeScript interfaces — nested types, optional fields, all client-side.

JSON & DataJSON Encoder & Decoder

Format, validate, and encode/decode JSON with Monaco editor — lenient parsing, local save, all client-side.

JSON & DataCSV to JSON Converter

Convert CSV to a JSON array — auto-detect delimiter, optional headers, dynamic typing.

JSON & DataJSON to Kotlin Data Class

Generate Kotlin data classes from a JSON object, complete with @SerialName annotations.

JSON & DataJSON to Swift Codable

Generate Swift Codable structs with CodingKeys from a JSON sample.