Turn JSON data files into TOML. It is converted in your browser, so the file never leaves your device.
Drop JSON files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop JSON files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. There is nothing else to set. The work happens in this tab.
Save the TOML, or download everything as one ZIP if you converted several files.
The JSON to TOML converter is part of this page and runs inside your browser. Your data files are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
JSON is hard to read in bulk and cannot be opened as a table without flattening. TOML is unambiguous and pleasant to edit by hand. JSON is at home in APIs and data exchanged between programs; TOML is the usual choice for simple configuration files.
Keys, nesting and values carry over. TOML needs named keys at the top level and cannot store empty (null) values, so a file with a top-level list or a null is refused, with the offending key named.
JSON represents data as nested objects and lists in plain text. It is the default language of web APIs. Unlike a spreadsheet it can be nested to any depth, which is also why turning it into rows and columns takes a decision about how to flatten it.
Opens in Any text editor, every programming language, browser developer tools
JSON converterTOML is a small configuration format with explicit sections and typed values. Rust's Cargo and Python's pyproject.toml use it.
Opens in Any text editor
TOML converter| JSONJSON data | TOMLTOML data | |
|---|---|---|
| Stands for | JavaScript Object Notation | Tom's Obvious Minimal Language |
| Type | Structured data (text) | Structured data (text) |
| Compression | None | None |
| Introduced | 2001, by Douglas Crockford | 2013, by Tom Preston-Werner |
| Opens in | Any text editor, every programming language, browser developer tools | Any text editor |
| Best for | APIs and data exchanged between programs | Simple configuration files |
| File extension | .json | .toml |
No. The JSON to TOML conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
The values are kept. Anything TOML has no way to express, such as formatting, formulas or nesting, is simplified or left out.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the JSON file, press Convert and save the TOML. There is nothing to install.
Yes. Data files up to 300 MB are accepted; a larger file is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.