JSON to TOML Converter
Convert JSON objects and arrays into TOML configuration text in your browser.
JSON input
Paste a JSON object, array, or value up to 1 MB. Null values are rejected because TOML has no null type.
TOML output
When to use JSON to TOML Converter
Common ways to use JSON to TOML Converter:
- Convert app configuration
Move a JSON settings object into TOML for tools that prefer TOML config files.
- Validate data before sharing
Catch malformed JSON, unsupported null values, or TOML syntax issues before sending config snippets to teammates.
- Debug nested settings
Turn nested objects into readable TOML tables so you can inspect sections and values quickly.
- Copy clean config output
Generate TOML or JSON and copy it directly into documentation, tickets, pull requests, or chat.
- Convert configuration on mobile
Use the browser-only workflow on a phone or tablet without installing command-line tools.
JSON to TOML Converter FAQ
- How do I convert JSON to TOML?
- Choose JSON to TOML, paste valid JSON, and the TOML output appears automatically. Use Copy or Download when the result is ready.
- Can I convert TOML back to JSON?
- Yes. Switch the direction to TOML to JSON, paste TOML text, and the app formats the parsed data as readable JSON.
- Does TOML support JSON null values?
- No. TOML has no null type, so the converter asks you to replace null with a string, number, boolean, array, or object before exporting.
- Is my configuration data stored?
- No. Conversion happens in your browser. AppDoesIt does not store the JSON or TOML text you paste into this tool.
- Why did I get a validation error?
- Most errors come from malformed JSON, unsupported null values, or TOML syntax issues such as missing equals signs or unclosed quotes.
JSON to TOML Converter Help
How to use
- Choose the conversion direction that matches your source text.
- Paste JSON or TOML into the input panel; conversion runs automatically as you type.
- Review validation feedback and fix any highlighted syntax or unsupported values.
- Copy the output or download it as a .toml or .json file.
Tips
- For JSON to TOML, nested objects become TOML tables and arrays remain inline arrays.
- Use quoted JSON keys when names contain spaces; the converter quotes TOML keys when needed.
- Use Clear before starting a new conversion to remove old output and status messages.
Troubleshooting
- If JSON fails, check for trailing commas, comments, unquoted property names, or null values that TOML cannot represent.
- If TOML fails, check table headers, quoted strings, arrays, and key/value separators.
- Inputs over 1 MB are rejected to keep the browser responsive.
Privacy and browser behavior
- Conversion runs locally in your browser; this app does not upload your input or output to a server.
- Clipboard and download actions only run after you click Paste, Copy, or Download.