JSON to TOML Converter — Online TOML to JSON Conversion Tool
JSON to TOML
JSON to TOML converter
Convert JSON to TOML — or TOML to JSON — in a clear dual-pane workspace. Paste or upload a file. Ideal for Cargo, pyproject, and app configs.
JSONInput
TOMLOutput
Ready — JSON to TOML
Both ways
JSON to TOML and TOML to JSON in one clean converter.
Config-friendly
Great for Cargo.toml, pyproject.toml, and app settings.
Private by design
Conversion runs in your browser — nothing uploaded.
JSON to TOML & TOML to JSON Converter
Free online JSON to TOML converter and TOML to JSON tool. Convert configs both ways instantly in a clean dual-pane UI.
JSON to TOML
TOML to JSON
Frequently asked questions
- How do I convert JSON to TOML?
- Paste JSON into the left panel (JSON → TOML mode). Valid TOML appears on the right instantly. Copy or download the .toml file — a free online JSON to TOML converter.
- Can I convert TOML to JSON too?
- Yes. Switch to TOML → JSON (or use the swap control). Paste TOML to get pretty-printed JSON — useful when you need TOML to JSON for APIs or editors that expect JSON.
- What can I use TOML for?
- TOML is common for Cargo.toml, pyproject.toml, and many app configs. Convert JSON to TOML when migrating settings, or TOML to JSON for tooling that only reads JSON.
- Is my data uploaded?
- No. Conversion runs locally in your browser with smol-toml. Nothing is sent to a server for the convert step.
Use this JSON to TOML and TOML to JSON converter to move between JSON APIs and TOML config files without leaving the browser.