Is this a full TOML spec implementation?

No, it covers the common subset used in config files: tables, strings, numbers, booleans, and arrays.

Are dotted table paths supported?

Yes, sections like [owner.contact] create nested objects.

Can I convert JSON back to TOML?

Yes, use the Swap direction button to switch modes.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

TOML to JSON Converter

Convert TOML configuration files to JSON and back.

Support

Works Offline

Privacy First

No Login

No API

TOML Input

JSON Output

{
  "title": "Example",
  "version": 1,
  "active": true,
  "tags": [
    "alpha",
    "beta"
  ],
  "owner": {
    "name": "Ada",
    "age": 28
  }
}

About the TOML to JSON Converter

Parse a practical subset of TOML — tables, strings, numbers, booleans, and arrays — into JSON, or serialize a JSON object back into TOML syntax.

Examples

Simple TOML

title = "Example"

Output

{
  "title": "Example"
}

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser