Free TOON to TOML Converter Online
Convert TOON to TOML instantly in your browser — no upload, no server, fully private.
TOON Input
TOML Output
What Is TOON to TOML?
If you've been working with TOON (Token-Oriented Object Notation) — the compact format designed for LLM output — and need to drop it into a project that runs on TOML, you know the pain of reformatting by hand. TOML is the config language behind Rust's Cargo, Python's Poetry, and plenty of other tools — it's explicit, readable, and strict. This converter takes your TOON, parses it, and outputs properly structured TOML tables and key-value pairs so you don't have to rewrite anything manually. Everything runs in your browser; nothing touches a server, so your data stays private. Need the TOML spec? It's a quick read and worth bookmarking.
This tool parses your TOON and outputs equivalent TOML. Conversion runs entirely in your browser. Nothing is sent to a server. The TOML spec defines the output format. For JSON instead, use TOON to JSON.
TOON to TOML Examples
Convert TOON to TOML. Telecom-themed example:
Example: Subscriber records
TOML output:
Click the Sample button above to load more examples into the editor.
How to Use This Tool
Paste or Upload TOON
Copy your TOON and paste it into the left editor. You can also click Upload to load a .toon or .txt file. The Sample button loads example data. Invalid TOON will show an error.
View TOML Output
The right panel shows the converted TOML. TOON keys become TOML keys; nested objects become [section] tables. Invalid TOON will show an error in the output.
Copy or Download
Use Copy or Download. For TOON to JSON, use TOON to JSON. For TOON formatting, use TOON Formatter.
When you receive TOON from an LLM or AI system but need to use it in a TOML-based project (e.g. Rust Cargo, Python Poetry), this conversion helps. TOML is explicit and widely used for config. Converting here gives you standard TOML.
When you receive TOON from an LLM or AI system but need to use it in a TOML-based project (e.g. Rust Cargo, Python Poetry), this conversion helps. TOML is explicit and widely used for config. Converting here gives you standard TOML.
Frequently Asked Questions
Is my data private when I use this converter?
Yes, completely. The conversion runs 100% in your browser using JavaScript — nothing is uploaded or sent to any server. You can even use it offline once the page has loaded.
What's the difference between TOON and TOML?
TOON is a compact, token-efficient notation designed for LLM output — it saves tokens. TOML is a human-readable config format used in tools like Cargo and Poetry. They serve different purposes; this tool bridges the gap when your data comes in as TOON but your project needs TOML.
Does the converter preserve nested structures and arrays?
Yes. Objects become TOML tables (using [section] headers), arrays become TOML arrays, and nested objects become dotted keys or nested sections. The structure maps cleanly in most cases.
What if I need JSON output instead of TOML?
Use the TOON to JSON converter instead — it's just as fast and also runs in-browser. Both conversions are lossless for standard TOON input.
Why doesn't the converted TOML include comments?
TOON has no comment syntax, so there's nothing to carry over. The output TOML won't have any comments. If you need them — say to document your Cargo.toml — just add them manually after conversion.