We use cookies.This website uses essential cookies to operate core features. With your consent, we also use analytics cookies to understand traffic and improve the service. For more details, see our .
We use cookies.This website uses essential cookies to operate core features. With your consent, we also use analytics cookies to understand traffic and improve the service. For more details, see our .
Was this tool helpful to use?
Your feedback helps us make it better
Free online TOML to JSON converter. Easily convert TOML configuration files into JSON format for seamless cross-platform deployment and API integration.
Enter TOML data to generate JSON.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
TOML stores named values in a readable configuration format. A table such as [server] groups values under a named section; in the JSON output it becomes a nested object. A repeated array-of-tables declaration such as [[jobs]] becomes an array whose entries are objects. Dotted keys also express nesting. These mappings help you inspect or move common configuration data into a system that accepts JSON.
This page converts pasted text into indented JSON as you edit. It also shows output line and key counts and provides a copy control. The parser handles common constructs such as tables, arrays, dotted keys, strings, booleans, supported numbers, inline tables, and date/time tokens. It is a practical preview, not a full TOML 1.0 or 1.1 implementation. TOML’s published specification describes a broader set of syntax than this converter supports.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Put a single TOML text block in the input area. Use the example control to load editable sample text, or clear the field to start over.
The JSON preview updates as the input changes. If parsing fails, read the displayed error and check the nearby key, value, quote, bracket, or repeated definition. Empty input leaves the result blank.
Use the result panel copy control, then verify object names and value types against the receiving application requirements. The line and key counts describe the rendered output; they do not certify that another application will accept it.
For input with [service] followed by two [[jobs]] entries, the shape is one service object and an ordered jobs array:
[service]
name = "demo"
port = 8080
[[jobs]]
name = "daily"
[[jobs]]
name = "weekly"The resulting JSON contains a service object with name and port, plus a jobs array containing two objects in input order.
Use cases
See how the tool fits into real work and everyday tasks.
If a deployment step, script, or service expects JSON but your starting example is TOML, convert a small snippet and compare its nested object and array structure before using it in the target workflow.
When discussing a configuration with someone who reads JSON more comfortably, the indented output can make groups and repeated records easier to scan. Keep the original file available so TOML comments and formatting notes are not lost.
For a documentation or test example, convert the supported portion to see its data shape, then validate the result with the application that will consume it. A successful preview does not check application-specific field names or constraints.
Q&A
Find concise answers to common questions and confusing cases.
No. It parses a supported subset of common syntax and should not be treated as a complete TOML specification validator. If a valid file is rejected, use a parser that documents full compatibility for the exact TOML version you need.
JSON has no dedicated date or time value type. This converter keeps recognized TOML date/time tokens as strings in the JSON output, so the consuming program must interpret them if it needs a date value.
No. JSON has no comment syntax, so TOML comments do not appear in the output. Keep the TOML source if its comments explain why a setting is present.
The input may use syntax outside the supported subset, contain a repeated key, or have an unclosed quote or bracket. Check the error text and simplify the snippet to isolate the failing construct.
Notes
Review scope, result limitations, and important precautions before use.
TOML and JSON do not represent every value in the same way. Comments are omitted, and date/time values are strings rather than native JSON dates. The parser rejects non-finite floating-point values and integers that cannot be represented safely, instead of silently emitting a misleading JSON number. Other unsupported or malformed values can also produce an error.
Do not assume that a displayed result preserves every detail or satisfies a production system’s schema. Keep the original TOML, review important values and nesting after copying, and test the JSON with the software that will use it. This converter is intended for common syntax previews and conversions, not exhaustive conformance testing.
Related
Discover related tools, collections, and available API capabilities.