To convert TOML to JSON, choose your TOML config files above, adjust the options if needed and press "Convert to JSON". The JSON downloads instantly: free, with no sign-up, and the file never leaves your device.
About the TOML to JSON Converter
This TOML to JSON converter turns config files from TOML into JSON without installing software or uploading anything. It solves a common problem: fewer tools, libraries and APIs understand TOML. Converting to JSON gives you structured JSON, ideal for APIs, web and mobile apps, configuration and MongoDB or Firebase data.
The file is parsed with well-tested open-source parsers (the browser's JSON and XML parsers, js-yaml and smol-toml) and written back out as valid JSON. Because everything happens on your own device, your config files are never uploaded, stored or seen by anyone else, which makes it safe for customer lists, salary sheets, GST data and API exports.
What to expect: objects, lists, numbers, booleans and text keep their structure and types; invalid input is reported with the line of the problem so you can fix it.
How to use the TOML to JSON Converter
- Click "Choose files" or drag your TOML config files onto the box. You can add several at once.
- No settings are needed; indentation and types are handled automatically.
- Press "Convert to JSON". The conversion runs on your device and shows its progress.
- Download each JSON file, or use "Download all (ZIP)" when you converted several.
- Open the result in every programming language or VS Code to check it; your original TOML is never changed.
Tips & benchmarks
- The JSON is pretty-printed with two-space indentation and numbers and booleans keep their types.
- Validate the output in your target tool (for example kubectl, Cargo or your API client) before deploying it.
- Keep the file name simple (letters, numbers and hyphens) if you plan to upload the JSON to a website or government portal.
Frequently asked questions
How do I convert TOML to JSON?
Click "Choose files", select your TOML config files, adjust the options if you want, and press "Convert to JSON". The JSON downloads immediately; with several files you can download everything as one ZIP.
Is this TOML to JSON converter free and safe?
Yes. It is completely free, with no sign-up, no daily limit and no watermark. The conversion runs inside your browser, so your config files never leave your phone or computer and nothing is stored on News Appite's servers.
What happens to nested data?
Nothing is lost: objects, lists and values map one-to-one between TOML and JSON. Comments are not carried over because most formats cannot store them.
Can I convert several TOML files at once?
Yes. Add as many TOML files as you like; they are converted one after another and you can download them individually or together as a ZIP.
Does it work on iPhone, Android and Mac?
Yes. The converter works in any modern browser, including Chrome, Safari, Edge and Firefox, on Android, iPhone, iPad, Windows, macOS and Linux. No app is needed.
What is the difference between TOML and JSON?
TOML (Tom's Obvious Minimal Language) is a minimal configuration format best suited to Rust and Python project settings, Hugo sites and application config. JSON (JavaScript Object Notation) is a structured data (text) best suited to APIs, web and mobile apps, configuration and MongoDB or Firebase data.
Is there a file size limit?
There is no upload limit, because nothing is uploaded. The practical limit is your device's memory: files of a few hundred megabytes work on most computers, and phones handle smaller files comfortably.
How do I convert TOML to JSON in Python?
Load it with the built-in tomllib (Python 3.11+): data = tomllib.load(open("input.toml", "rb")), then write it with json.dump, yaml.safe_dump or xmltodict.unparse. If you just need the file, this converter does it in the browser without writing any code.
TOML ko JSON kaise kare?
Is page par "Choose files" dabaiye, apni TOML file chuniye aur "Convert to JSON" par click kijiye. JSON file turant download ho jaati hai. Ye bilkul free hai, sign-up nahi chahiye, aur aapki file kisi server par upload nahi hoti.
TOML vs JSON: format comparison
| TOML | JSON | |
|---|---|---|
| Full name | Tom's Obvious Minimal Language | JavaScript Object Notation |
| Type | Minimal configuration format | Structured data (text) |
| Created by | Tom Preston-Werner, 2013 (v1.0 in 2021) | Douglas Crockford, early 2000s (RFC 8259) |
| Compression | None (text) | None (text) |
| File extension | .toml | .json |
| MIME type | application/toml | application/json |
| Best for | Rust and Python project settings, Hugo sites and application config | APIs, web and mobile apps, configuration and MongoDB or Firebase data |
| Opens in | VS Code, Cargo, pip, Poetry, Hugo and most languages via libraries | every programming language, VS Code, Postman, browsers and databases |
What is a TOML file?
TOML is a minimal configuration format with clear key = value pairs and [sections]. It is used by Rust's Cargo.toml, Python's pyproject.toml, Hugo and many other developer tools.
What is a JSON file?
JSON is the data format of the modern web: almost every API, app configuration and NoSQL database speaks it. It represents objects, arrays, numbers and text in a compact, human-readable way.
Need it the other way round? Use the JSON to TOML Converter.
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All tools on News Appite are free to use for personal and commercial work. Calculations and file conversions are performed in your browser; the redirect and cache checkers make a single request to the URL you enter and store nothing. Found a bug or want a new tool? Tell us.