Free Online TOML to JSON

TOML-to-JSON conversion parses a TOML configuration file — the format used by Cargo, pyproject.toml, and many CLI tools — into JSON.

Your data is processed entirely in your browser and never sent to any server.

Instant results 100% private No signup needed

How to Use This Developer Tool

  1. Paste your TOML config into the input area.
  2. Read the JSON output in the right panel.
  3. Click Copy to send the JSON to your clipboard.

What Is a TOML to JSON?

TOML is friendlier than INI and stricter than YAML — explicit sections, dotted keys, and typed scalars make it easy to read and parse. Converting to JSON is mostly a tree-walk: each `[section]` becomes a nested object, each `key = value` becomes a property, and the typed scalars (string, integer, float, boolean) carry their types over directly.

This converter handles the bread-and-butter subset: sections (including dotted-key tables), key/value pairs, strings, numbers, booleans, and inline arrays. Datetimes are emitted as ISO 8601 strings. Useful for inspecting `Cargo.toml` dependencies, debugging a `pyproject.toml` build configuration, or feeding TOML config into a JSON-only validator.

Frequently Asked Questions

What is TOML?
TOML (Tom's Obvious Minimal Language) is a config format used by Rust's Cargo, Python's pyproject.toml, and many other tools.
What TOML features are supported?
Tables (sections), key/value pairs, strings, numbers, booleans, and inline arrays. Inline tables and datetimes are passed through as strings.
When would I convert TOML to JSON?
When you need to use TOML config data in JavaScript, pass it to an API, or validate it with JSON Schema.

Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.

Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.

Related Developer Tools

JSON to YAML

Convert JSON to YAML format. Transform structured data for config files, Kubernetes, and DevOps workflows.

YAML to JSON

Convert YAML to JSON format. Parse YAML config files into JSON for APIs and JavaScript applications.

JSON Formatter

Format and beautify JSON data with proper indentation and syntax highlighting. Validates JSON structure while formatting.

JSON Validator

Validate JSON syntax and structure. Detects errors, shows line numbers, and provides helpful error messages.

JSON Schema Generator

Generate JSON Schema (draft-07) from JSON data. Create validation schemas for APIs and data validation.