JSON to Go BSON: a worked example

This is real output from the converter on this page, not an illustration. The input below deliberately includes the cases that trip up naive converters — a float, a null, an empty array, an array of mixed types, and a nested object.

Input JSON

{
  "id": 101,
  "name": "Ada Lovelace",
  "active": true,
  "score": 9.5,
  "deletedAt": null,
  "tags": [
    "admin",
    "ops"
  ],
  "scores": [],
  "mixed": [
    1,
    "two"
  ],
  "createdAt": "2026-01-15T08:00:00.000Z",
  "profile": {
    "city": "Lisbon",
    "zip": 1000
  },
  "addresses": [
    {
      "line1": "1 Rua Augusta",
      "country": "PT"
    }
  ]
}

Generated Go BSON

type User struct {
	ID int64 `bson:"id" json:"id"`
	Name string `bson:"name" json:"name"`
	Active bool `bson:"active" json:"active"`
	Score float64 `bson:"score" json:"score"`
	DeletedAt *string `bson:"deletedAt" json:"deletedAt"`
	Tags []string `bson:"tags" json:"tags"`
	Scores []interface{} `bson:"scores" json:"scores"`
	Mixed []interface{} `bson:"mixed" json:"mixed"`
	CreatedAt string `bson:"createdAt" json:"createdAt"`
	Profile struct {
	City string `bson:"city" json:"city"`
	Zip int64 `bson:"zip" json:"zip"`
} `bson:"profile" json:"profile"`
	Addresses []struct {
	Line1 string `bson:"line1" json:"line1"`
	Country string `bson:"country" json:"country"`
} `bson:"addresses" json:"addresses"`
}

How each JSON type maps to Go BSON

Every row is generated by running that JSON value through the converter, so the table always matches what the tool actually emits.

JSON typeExample valueGenerated Go BSON
string"Ada Lovelace"Field string `bson:"field" json:"field"`
integer101Field int64 `bson:"field" json:"field"`
float9.5Field float64 `bson:"field" json:"field"`
booleantrueField bool `bson:"field" json:"field"`
nullnullField *string `bson:"field" json:"field"`
array of strings["admin", "ops"]Field []string `bson:"field" json:"field"`
empty array[]Field []interface{} `bson:"field" json:"field"`
mixed-type array[1, "two"]Field []interface{} `bson:"field" json:"field"`
nested object{ "city": "Lisbon" }see the full example above
date-like string"2026-01-15T08:00:00.000Z"Field string `bson:"field" json:"field"`

JSON to Go BSON Converter – Free Online Tool

Convert JSON to Go BSON instantly with JSONStudio's free online converter. Whether you're a backend developer working with configuration files, a DevOps engineer managing infrastructure as code, or a data analyst processing API responses, ourGo BSON converter provides instant, accurate conversions with zero data uploads.

JSONStudio's JSON to Go BSON converter runs entirely in your browser, ensuring maximum security and privacy. All processing happens client-side, so your sensitive JSON data never leaves your device. No signup, no tracking, no storage—just fast, reliable conversion when you need it.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data interchange format that's become the de facto standard for API communication, configuration files, and structured data storage. Its human-readable syntax and language-agnostic design make it ideal for modern web development, mobile apps, and microservices architectures.

JSON is used everywhere—from REST APIs and GraphQL responses to configuration files and database exports. Its simplicity and widespread support across programming languages have made it the preferred format for data exchange in modern software development.

What is Go BSON?

BSON (Binary JSON) is the primary data format used by MongoDB. When working with MongoDB in Go, developers use structs with `bson` tags to map Go data structures to MongoDB documents.

This tool converts standard JSON into Go structs annotated with both `json` and `bson` tags, making it incredibly easy to prepare data models for MongoDB applications written in Go.

Why Convert JSON to Go BSON?

  • MongoDB ready: Generate structs with `bson` tags for direct use with the official MongoDB Go Driver
  • Dual compatibility: Includes both `json` and `bson` tags for versatility
  • Productivity: Skip the tedious process of manually adding struct tags
  • Accuracy: Ensure field names match exactly between your JSON/BSON and Go code

How to Convert JSON to Go BSON Online

  1. Paste your JSON: Copy your JSON data from any source—API response, configuration file, or database export—and paste it into the left panel.
  2. Automatic validation: JSONStudio instantly validates your JSON syntax and highlights any errors, ensuring your data is properly formatted before conversion.
  3. Instant conversion: Select "Go BSON" from the converter dropdown and watch as your JSON transforms into Go BSON format in real-time.
  4. Copy or download: Use the one-click copy button to copy the converted Go BSON output, or download it directly to your device.

All conversion happens entirely in your browser using client-side processing. Your JSON data is never uploaded to any server, ensuring complete privacy and security for sensitive information.

Features of JSONStudio JSON to Go BSON Converter

  • Instant conversion: Real-time conversion with no delays or waiting
  • Large file support: Handle JSON files of any size without performance issues
  • Syntax highlighting: Color-coded output makes it easy to read and verify
  • Error detection: Automatic validation catches JSON syntax errors before conversion
  • One-click copy: Copy converted output to clipboard instantly
  • No signup required: Start converting immediately without creating an account
  • Free forever: All features available at no cost, with no usage limits
  • Dark mode support: Comfortable viewing in any lighting condition

Example JSON to Go BSON Conversion

Input JSON:

{
  "name": "John Doe",
  "age": 30,
  "email": "john@example.com",
  "active": true
}

Converted Go BSON:

type Root struct {
	Name   string `bson:"name" json:"name"`
	Age    int64  `bson:"age" json:"age"`
	Email  string `bson:"email" json:"email"`
	Active bool   `bson:"active" json:"active"`
}

Is JSONStudio Secure?

100% client-side processing: All JSON conversion happens entirely in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security.

No logging or tracking: JSONStudio doesn't log, store, or track any of your JSON data. We don't use analytics that capture your content, and we don't maintain any server-side storage of your files.

No data uploads: Unlike many online converters that upload your files to servers, JSONStudio processes everything locally. This means even if you're working with sensitive API keys, passwords, or proprietary data, it remains completely private.

No server involvement: JSONStudio is a fully static site with no backend server. There is no server to send your data to, even accidentally.

Who Should Use This Tool?

  • Go developers using MongoDB as their database
  • Backend engineers building data-intensive applications with Go
  • Developers migrating data from JSON sources to MongoDB

Frequently Asked Questions

What is the difference between Go Struct and Go BSON converter?

The Go BSON converter adds `bson:"..."` tags in addition to JSON tags. This is specifically useful for Go applications that interact with MongoDB.

Can I use the output with the official MongoDB Go Driver?

Yes, the generated structs are fully compatible with the official `mongo-go-driver` and other BSON-compatible libraries.

Is this tool free?

Yes, it is completely free and runs entirely in your browser.

Related Tools

JSONStudio offers a complete suite of JSON tools to help you work with JSON data more effectively: