TOML JSON

TOML to JSON Converter

Convert TOML to JSON in your browser. Free, private, and fast. TOML config as JSON — nothing is uploaded.

Drag & drop your TOML file here

or

Max file size: 50 MB · Your file stays in your browser

Your file is processed locally in your browser — nothing is ever uploaded.

Why Convert TOML to JSON?

Config files in TOML are easy to edit but most tools and APIs expect JSON. This converter parses TOML (including tables, arrays of tables and dates) and writes indented JSON.

Common use cases

  • You have a TOML file and need it in JSON format.
  • The target software or platform requires JSON but your file is in TOML.
  • Typical use of JSON: REST API payloads and configuration files.
  • You want to reduce file size or improve compatibility without using desktop software.
Keep in mind: JSON has no comments, no date type, and gets hard to read when deeply nested or minified — formatting and conversion tools help.

How to Convert TOML to JSON

  1. Upload or drop your TOML file into the converter above.
  2. Adjust any output settings for JSON if needed.
  3. Click Convert and download your converted file instantly.

About the Formats

TOML (Tom's Obvious Minimal Language)

TOML is a configuration file format designed to be easy for people to read and write. It is used by Rust (Cargo), Python (pyproject.toml), Hugo and many other tools, and maps clearly onto a dictionary of values.

Compatibility: Supported by libraries for every major programming language.

JSON (JavaScript Object Notation)

JSON is the standard data-interchange format of the web. It represents structured data as nested objects and arrays in plain text — human-readable, language-independent, and natively supported by every programming language and API in common use.

Compatibility: Universal — every programming language, browser, and modern tool reads JSON.

100% Private & Browser-Based

Your files never leave your device. All conversion happens locally in your browser — nothing is uploaded to any server. No sign-up required.

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Need the reverse?

JSON to TOML Converter

FAQ

Frequently Asked Questions

Yes — completely free with no sign-up, no watermarks, and no size limits for typical files.

Quality depends on the output settings. For lossless output, choose the highest quality setting available.

Your file is processed entirely within your browser using local JavaScript. It is never uploaded to any server. Only you can access your file.

For browser-based conversion, files up to 50 MB work best. Very large files may take longer depending on your device. We recommend splitting very large files before converting.

Currently, AintoB converts one file at a time to keep the browser-based process simple and private. Reload the page to convert another file.