IT Consulting
Illustration of a TOML block converting to and from an equivalent JSON block

JSON ↔ TOML Converter

Paste JSON or TOML below and convert either direction. Parsing/writing TOML isn't practical in a browser without an external library, so this one round-trips to the server to convert — nothing is stored, the request/response is the only place it exists.

ℹ️ About this converter
  • Uses Python's standard-library tomllib (parsing) and tomli_w (writing) on the server — the only way to get correct, spec-compliant TOML without an external JS library.
  • TOML documents are always a table at the top level, so converting JSON → TOML requires a JSON object (not an array or a bare value); TOML has no null, so a JSON null anywhere in the input can't be converted.
  • Nothing is logged or stored: the pasted content only exists for the duration of the request.
💻 Show API usage example (cURL) 
curl -sS "https://devops.majbase.com/json-toml-converter/api" \
    --data-urlencode 'direction=json-to-toml' \
    --data-urlencode 'text={"name": "my-app", "port": 8080}'

Returns {"result": "..."}, or {"error": "..."} for malformed input. Use direction=toml-to-json for the other way; optional sort_keys=true and indent=2|4 (toml-to-json only).