TOML to JSON Converter
Convert TOML to JSON online. Paste a Cargo.toml, pyproject.toml, or config file and get clean JSON instantly — handles tables, array-of-tables, and inline collections, all in your browser.
Features
⚙️ Full Structural Support
- Dotted and nested
[tables] [[array-of-tables]]for repeated entries- Inline tables and inline arrays
- Typed values: strings, ints, floats, booleans, dates
⚡ Privacy-First
- All parsing happens in your browser
- No data ever sent to a server
- Multi-line arrays and inline tables supported
- Download or copy the resulting JSON instantly
🔄 Round-Trip Friendly
- Pairs with our JSON to TOML converter
- Great for Cargo.toml, pyproject.toml, Hugo configs
- Inspect a TOML file's structure as plain JSON
- Feed the JSON output into any JSON tool or validator
TOML to JSON Guide
TOML powers configuration for Rust's Cargo, modern Python packaging (pyproject.toml), and the Hugo static site generator. Its unambiguous grammar makes it easy to convert to JSON for tooling that only understands JSON — schema validators, diffing tools, or scripts that need to read config values programmatically.
Frequently Asked Questions
How are [[array-of-tables]] handled?
Each [[name]] header appends a new object to a JSON array under that key — this is TOML's way of expressing a list of tables, common for dependency lists or repeated config blocks.
Are dotted keys supported?
Yes — both dotted table headers ([profile.release]) and dotted inline keys (a.b.c = 1) create the correct nested JSON structure automatically.
What happens to dates and times?
TOML's native date/time types are preserved as ISO 8601 strings in the JSON output, since JSON has no native date type.