TOML ↔ JSON Converter
Convert simple TOML to JSON and JSON to TOML, in both directions
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
Convert between TOML and JSON, two formats commonly used for config files, in both directions. It supports the basic syntax—key-value pairs, tables ([table]), arrays of tables ([[table]]), arrays, and inline tables—so you can quickly move settings from one format to the other.
How to use
- Choose the conversion direction (TOML → JSON or JSON → TOML) from the tabs at the top.
- Paste the content you want to convert, or click 'Load example' to insert a sample.
- The converted result appears immediately below.
- Use 'Copy result' to put it on your clipboard.
FAQ
- How much TOML syntax is supported?
- It supports key-value pairs; strings, numbers, booleans, and arrays; tables ([table]) and arrays of tables ([[table]]); inline tables; dotted (nested) keys; and arrays spanning multiple lines. Some advanced syntax, such as multi-line strings, is handled in a simplified way.
- Is there anything to watch out for when converting JSON to TOML?
- The top level of TOML must be an object, and since TOML has no concept of null, keys with a null value are omitted from the result. Strings that look like dates or times are kept as plain strings.
- Is my input data sent to a server?
- No. All conversion happens inside your browser, and the TOML or JSON you enter is never sent to or stored on a server.