TOML ↔ JSON Converter

Convert between TOML and JSON formats — instantly in your browser.

100% Browser-Based

Files Never Leave Your Device

No Server Uploads

Zero Data Collection

How It Works

Paste TOML or JSON data

Click to convert in either direction

Copy the converted output

Convert TOML → JSON and JSON → TOML

Handles tables, arrays, inline tables, and datetime values

JSON output is properly indented for readability

What is TOML?

TOML (Tom's Obvious Minimal Language) is a config file format used in Rust (Cargo.toml), Python (pyproject.toml), and many other tools.

Does it handle datetime values?

Yes, TOML datetime values are converted to ISO 8601 strings in JSON.

What about comments?

TOML comments are lost when converting to JSON, as JSON does not support comments.