TOML to JSON Converter — Free Online
Paste TOML configuration or drop a .toml file to instantly convert it to clean, formatted JSON. Runs entirely in your browser — nothing is uploaded.
TOML Input — paste, type, or drop a file
Drop a .toml file here, or
JSON Output
What This Tool Does
The TOML to JSON converter parses TOML (Tom's Obvious Minimal Language) text and transforms it into equivalent JSON. TOML is the standard configuration format for Rust projects (Cargo.toml), Python packaging (pyproject.toml), Hugo sites, Netlify, and many other tools.
TOML vs JSON — Key Differences
| Feature | TOML | JSON |
|---|---|---|
| Comments | Supported (#) | Not supported |
| Sections | [table] and [[array of tables]] | Nested objects and arrays |
| Multi-line strings | Triple-quoted (""" and ''') | Escaped newlines (\n) only |
| Date/Time | Native datetime, date, and time types | No native date type (use strings) |
| Use case | Configuration files, human-edited settings | APIs, data interchange, machine-generated data |
Privacy & Security
All TOML parsing and JSON generation runs locally in your browser using JavaScript. No data is sent to any server.
💡 Need to go the other direction? Use the JSON to TOML converter to transform JSON into readable TOML. You can also format your JSON output.
Related Guides & Tutorials
Frequently Asked Questions
What is the difference between TOML and JSON?▼
TOML uses sections with [brackets] and key = value syntax, designed for human-readable configuration. JSON uses braces and brackets with strict quoting. TOML supports comments, native date/time types, and multi-line strings that JSON does not.
Does this tool handle TOML datetime values?▼
Yes. TOML native datetime values (e.g. 2026-02-26T10:30:00Z) are converted to ISO 8601 strings in JSON.
Are TOML comments preserved?▼
No. JSON does not support comments, so TOML comments are stripped during conversion.
Can I convert arrays of tables?▼
Yes. TOML arrays of tables defined with [[double.brackets]] are converted to JSON arrays of objects.
Can I go from JSON back to TOML?▼
Yes — use the JSON to TOML converter.