JSON output will appear here
Paste TOML and click Convert// parse toml and export structured json output
Convert TOML configuration files to JSON format instantly. Parse TOML and export clean, structured JSON output. Free, browser-based, no upload required.
JSON output will appear here
Paste TOML and click ConvertPaste your TOML configuration file or text into the input area on the left.
Select indentation level (2 spaces, 4 spaces, or minified) and optional key sorting.
Click Convert to JSON, then copy to clipboard or download the output as a .json file.
TOML (Tom's Obvious Minimal Language) is a configuration file format favored for its human readability. This tool parses TOML and exports it as structured JSON — no install, no server, fully client-side.
This tool supports TOML v1.0 including all core data types: strings (basic and literal), integers, floats, booleans, offset date-times, local date-times, local dates, local times, arrays, tables, inline tables, and arrays of tables.
TOML date/time values are converted to ISO 8601 strings in JSON, since JSON has no native date type. Offset Date-Times keep their timezone offset, while local dates become date-only strings like "1979-05-27".
Yes. TOML's [[array.of.tables]] syntax is fully supported and maps to JSON arrays of objects. Dotted keys and nested [table.subtable] headers are also handled correctly.
No. All conversion happens entirely in your browser using JavaScript. Nothing is sent to any server, and no data is stored or logged. You can use this tool safely with sensitive configuration files.
When enabled, all JSON object keys are sorted alphabetically at every nesting level. This is useful for diffing JSON outputs, generating consistent hashes, or making large configs easier to scan.
This tool converts TOML → JSON only. For the reverse direction, check a dedicated JSON to TOML converter. You can also use our YAML to JSON or JSON Formatter tools for related config workflows.
TOML (Tom's Obvious Minimal Language) has become one of the most popular configuration file formats in modern development, used by Rust's Cargo, Python's pyproject.toml, Hugo static site generator, and many other tools. However, most APIs, web services, and runtime environments expect JSON. This free TOML to JSON converter bridges that gap instantly — paste any TOML, click Convert, and get clean, valid JSON ready to use.
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TOML stands for Tom's Obvious Minimal Language, created by Tom Preston-Werner (co-founder of GitHub). It was designed to be a minimal configuration language that is easy to read due to its obvious semantics. Unlike YAML — which can be ambiguous and has surprising edge cases — TOML maps unambiguously to a hash table. Unlike JSON, TOML supports comments, multiline strings, and expressive date/time types natively.
TOML is now widely used in the Rust ecosystem (Cargo.toml for every Rust package), Python packaging (pyproject.toml per PEP 518), Hugo and Zola static site generators, and many DevOps and CI/CD tools. Understanding how TOML maps to JSON is essential when integrating these tools with JSON-native environments.
The conversion from TOML to JSON follows a clear set of rules:
[section] header becomes a nested JSON object key.[[products]] syntax creates an array where each [[products]] block is one element."hello") and literal strings ('world') become standard JSON strings.1_000_000), which are stripped for JSON output.true/false, same as JSON.1979-05-27T07:32:00Z) become ISO 8601 strings. Local dates become date-only strings.{ x = 1, y = 2 } inline syntax maps directly to a JSON object.There are several common scenarios where developers need to convert TOML to JSON:
When working with TOML files, keep these best practices in mind. First, use [[ ]] (double brackets) for arrays of tables — this is one of the most common TOML-specific features that new users miss. Second, prefer literal strings ('...') when your value contains backslashes, since they require no escaping. Third, avoid deeply nested dotted keys when a [table] header would be clearer. Finally, always validate your TOML before converting — a syntax error in TOML will produce an unhelpful JSON result or no output at all.
This converter catches common TOML errors and reports them with line context so you can quickly locate and fix issues in your source file.
Installing command-line tools like dasel, yq, or writing a small Python/Node script is perfectly valid for repeated batch processing. However, for one-off conversions, documentation, or when working on a machine where you can't install software, a browser-based converter is the fastest option. This tool requires no installation, works offline (once the page loads), handles all TOML v1.0 features, and produces human-readable JSON output with configurable indentation. It's ideal for developers, DevOps engineers, and anyone who works with configuration files regularly.