Ctrl+K

TOML to JSON Conversion

Convert TOML data to JSON format. Useful for API integration and config compatibility. Enter text or upload a file (up to 100KB) and see real-time conversion results.

TOML Input

JSON Output

Read Only

How to use

About this tool

Converts TOML strings to JSON.

How to use

Paste TOML; the JSON output can be copied.

Use cases

• Converting TOML (e.g. Cargo.toml) to JSON for APIs/tools • Unifying config formats • Readability and processing

Code Examples

TOML input example (before)

Read Only

1# Comments are ignored
2[package]
3name = "my-app"
4version = "1.0.0"
5
6[database]
7host = "localhost"
8port = 5432
9enabled = true
10
11[[servers]]
12host = "api.example.com"
13[[servers]]
14host = "cache.example.com"

JSON output example (after)

Read Only

1{
2  "package": {
3    "name": "my-app",
4    "version": "1.0.0"
5  },
6  "database": {
7    "host": "localhost",
8    "port": 5432,
9    "enabled": true
10  },
11  "servers": [
12    { "host": "api.example.com" },
13    { "host": "cache.example.com" }
14  ]
15}

How it works

■ What is TOML? TOML (Tom's Obvious, Minimal Language) is a human-readable format for config files. It supports key=value pairs, [sections], arrays, and types such as dates, integers, floats, and booleans. It is widely used in Rust (Cargo.toml), Python (pyproject.toml), and elsewhere. ■ What is JSON? JSON (JavaScript Object Notation) represents key-value pairs, arrays, and nested objects as text. It is commonly used for API requests/responses and data exchange. ■ How conversion works The tool parses the TOML string into an intermediate object, then serializes it to formatted JSON (2-space indent). Date and datetime values are output as ISO 8601 strings. All processing runs in the browser.

Privacy and data

Conversion runs entirely in the browser; TOML and JSON are never sent to a server.