> toml | json | parse <
// Parse TOML configuration files and convert to JSON
TOML Validator
Parse and validate TOML syntax in real time. Supports tables, arrays, strings, numbers, booleans, and inline tables.
TOML↔JSON Conversion
Convert TOML to JSON and JSON back to TOML with a single click. Full bidirectional support.
Config File Support
Works with Cargo.toml, pyproject.toml, Hugo config, and any TOML configuration file. 100% client-side.
// ABOUT TOML PARSING
How It Works:
TOML (Tom's Obvious Minimal Language) is a configuration file format designed to be easy to read. It maps unambiguously to a hash table and is used in Cargo.toml (Rust), pyproject.toml (Python), and Hugo site generators. This parser processes key-value pairs, tables, arrays of tables, and inline structures.
Example:
[server] host = "localhost" port = 8080 → {"server":{"host":"localhost","port":8080}}
Common Use Cases:
- >Parse and validate Cargo.toml for Rust projects
- >Inspect pyproject.toml for Python packaging
- >Convert TOML config files to JSON for APIs
- >Debug Hugo and other static site generator configs
- >Migrate between TOML and JSON configuration formats
>> frequently asked questions
Q: What is TOML?
A: TOML (Tom's Obvious Minimal Language) is a configuration file format created by Tom Preston-Werner (co-founder of GitHub). It is designed to be easy to read and write, mapping unambiguously to a dictionary/hash table. It supports strings, integers, floats, booleans, datetimes, arrays, and tables.
Q: TOML vs YAML vs JSON - what's the difference?
A: TOML is designed for configuration files and is more readable than JSON (supports comments, no excessive braces). Unlike YAML, TOML has unambiguous syntax (no indentation-based parsing issues). JSON is best for data interchange, YAML for complex data structures, and TOML for human-edited configuration.
Q: Where is TOML used?
A: TOML is widely used in Rust (Cargo.toml for package management), Python (pyproject.toml for project configuration per PEP 518), Hugo static site generator, and many other tools. It is the default config format for the Rust ecosystem.
Q: What are TOML tables?
A: Tables in TOML are sections denoted by [brackets] that create nested objects. For example, [database] starts a section where all following key-value pairs belong to the "database" object. Dotted keys like [server.http] create nested tables.
Q: How do TOML arrays work?
A: TOML supports inline arrays like ports = [8080, 8081] and arrays of tables using [[double.brackets]]. Each [[products]] entry creates a new element in the "products" array, each being its own table with key-value pairs.