Free TOML to Go Converter — generate Go structs from TOML in your browser

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🧬 TOML to Go — Free Online Tool

Convert TOML to Go online, free. TOML is a readable configuration format built around key/value pairs and tables. Go structs with field tags marshal cleanly to and from data formats. TOML to Go conversion parses your TOML against the TOML v1.0.0 grammar (https://toml.io/en/v1.0.0), builds an in-memory model of its keys, nested objects and arrays, then emits ready-to-use Go types as structs with json field tags following the The Go Programming Language Spec conventions. Processing runs in your browser in JavaScript with no upload or server round-trip — no size limit beyond your device's memory, so multi-megabyte documents convert in milliseconds and sensitive payloads never leave your machine. Typical uses include Go microservices, CLIs and encoding/json struct mapping.

🚀 Why use this TOML to Go tool?

It maps the full structure of your TOML onto idiomatic Go types, following the The Go Programming Language Spec conventions. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.

Key Features

Instant, in-browser

Paste TOML and generate Go types from Go immediately. Conversion runs client-side, so there is no upload wait and large documents stay fast.

🧩Structure-aware mapping

Nested TOML objects, tables and arrays are mapped faithfully onto Go, including nested types and optional fields.

🔒100% private

Your TOML never leaves your device — everything is processed locally in JavaScript, with nothing logged or stored.

🆓Free, no signup

Unlimited conversions with no account, no quotas, and no watermark. Works on desktop and mobile.

Popular Use Cases

Typed models from samples

  • Turn a sample TOML payload into Go types
  • Skip hand-writing boilerplate models
  • Keep front-end and back-end shapes in sync

Go microservices

  • Go microservices
  • CLIs
  • encoding/json struct mapping

Onboarding a new API

  • Paste an example TOML response
  • Get typed Go to consume it safely
  • Catch shape mismatches at compile time

What It Handles

Structure

  • Nested objects & tables
  • Arrays / lists
  • Deeply nested documents

Values

  • Inferred types (string, number, boolean)
  • Optional / nullable fields
  • Nested type names

Workflow

  • Copy or download output
  • Load an example to try it
  • Validate & format the input

Worked example

A TOML document and its Go equivalent:

TOML input:

host = "db.internal"
port = 5432
secure = true

Output:

type Server struct {
    Host string `toml:"host"`
    Port int `toml:"port"`
    Secure bool `toml:"secure"`
}

Sources & References

Frequently Asked Questions

How do I convert TOML to Go?

Paste your TOML into the editor and press "Convert to Go". The tool parses it against the TOML v1.0.0 grammar, then generates Go types following The Go Programming Language Spec conventions — instantly and entirely in your browser. You can validate or format the TOML first to be sure it is clean.

How is TOML structure represented in Go?

TOML values are typed and it has first-class dates and times, so they carry into Go cleanly. TOML tables become nested Go types, and arrays-of-tables become lists.

Are optional fields detected when generating Go?

Optional or nullable members in the generated Go are inferred from keys missing in some records of your TOML, following The Go Programming Language Spec. Include the optional fields in your sample so they are typed correctly.

What is the difference between TOML and Go?

TOML (Tom's Obvious Minimal Language) (TOML) — TOML is a readable configuration format built around key/value pairs and tables. Go (Golang) structs (Go) — Go structs with field tags marshal cleanly to and from data formats. This converter maps the structure of your TOML onto Go so you can use it for Go microservices.

Does the converter validate my TOML first?

Yes. Invalid TOML is flagged with a clear error before anything is converted. Common TOML problems to check are correct key/value pairs, quoted strings, and valid [table] headers. Starting from clean input keeps the generated Go accurate.

Is my TOML data private?

Yes. The entire TOML-to-Go conversion runs locally in your browser in JavaScript — your TOML is never uploaded, logged or stored. That matters when the data is something like Rust Cargo & Python pyproject config, which should not leave your machine.

Where can I use the Go output?

The generated Go is ready for Go microservices, CLIs and encoding/json struct mapping. Copy or download it and drop it straight into your codebase.

🎓 Pro Tips

  • Tip 1: Validate or format your TOML first (the Validate / Format buttons) so the converter works from clean, TOML v1.0.0-conformant input.
  • Tip 2: Give the tool a representative TOML sample — optional fields are only detected from the keys actually present, so include them if they matter.
  • Tip 3: Authoritative reference for the input format: TOML v1.0.0 — https://toml.io/en/v1.0.0.
  • Tip 4: For the output, follow the The Go Programming Language Spec (https://go.dev/ref/spec) conventions in your codebase.