JSON to Go BSON Converter - Generate MongoDB Structs Online

🍃 JSON to Go BSON

Automatically generate Go struct definitions with BSON tags from JSON sample. Perfect for MongoDB development with Go.

📝 Input JSON:
📤 Output Go BSON:
// Go bson.M format will appear here...
Structs: 0
Fields: 0
Nested: 0
💡 Example JSON Samples:
👤 User Object
Simple user with basic fields
🛍️ Product with Nested
Product with nested category and tags
📡 API Response
Typical API response structure

Online JSON to Go BSON Converter: Generate MongoDB Structs

Accelerate your backend development with our JSON to Go BSON converter. When building Golang applications that use MongoDB, you need to define Go Structs with specific bson tags for proper data mapping. This tool allows you to paste any JSON sample and instantly generate clean, idiomatic Go code with both json and bson tags, ready to be used with the official MongoDB Go Driver.

Why Convert JSON to Go Structs with BSON Tags?

In Golang, the way data is stored in MongoDB often differs from how it is sent over an API. Using specific tags is the best way to manage these differences.

Seamless MongoDB Integration

By adding bson tags to your Go Structs, you can control exactly how fields are named in your MongoDB collections. For example, you can map a Go field named UserID to a BSON field named user_id or even the specialized _id field.

Automate Boilerplate Code

Manually writing Struct definitions for complex, nested JSON objects is tedious and error-prone. Our tool handles deep nesting, arrays, and various data types, allowing you to focus on your business logic instead of boilerplate code.

Key Features of Our JSON to Go BSON Tool

Our converter is designed to follow Golang's best practices and MongoDB's naming conventions.

1. Dual Tag Support (JSON & BSON)

The tool automatically generates both json:"..." and bson:"..." tags for every field. This is perfect for developers building REST APIs that interact directly with a MongoDB database.

2. Intelligent Type Mapping

Our engine accurately maps JSON types to Golang primitives and specialized types:

  • string → string

  • number (integer) → int64

  • number (float) → float64

  • boolean → bool

  • null/optional → *pointers or omitempty tags.

3. Support for MongoDB _id and omitempty

The converter intelligently identifies potential ID fields and provides options to include the omitempty tag. This prevents empty fields from being stored in your MongoDB documents, saving storage space and keeping your data clean.

How to Convert JSON to Go BSON

  1. Paste your JSON: Insert your raw JSON data into the input window.

  2. Set Struct Name: Enter a name for your root struct (e.g., Product or Account).

  3. Generate Code: The Go code with BSON tags appears instantly in the output section.

  4. Copy & Paste: Use the "Copy" button to move the code into your .go file.

Technical Insights: Go and BSON Mapping

Handling Nested Objects

For nested JSON objects, the tool generates sub-structs. This modular approach makes your code easier to read and allows you to reuse sub-types across different parts of your application.

The Importance of omitempty

In MongoDB, it is common practice to omit fields that are empty or null. Our tool can automatically append ,omitempty to your BSON tags, ensuring that your Go driver behaves correctly during Insert or Update operations.

Frequently Asked Questions (FAQ)

Is this compatible with the official MongoDB Go Driver?

Yes! The generated bson tags are fully compatible with the official mongo-go-driver and older libraries like mgo.

Can I convert large JSON files?

Absolutely. Our tool is optimized to parse and convert large, deeply nested JSON structures quickly without any server-side processing.

Is my data stored on your server?

No. All conversion logic is executed locally in your browser using JavaScript. Your data remains private and secure on your own machine.