TOML to YAML Converter
Convert TOML configuration to YAML online. Paste TOML content such as a Cargo.toml or pyproject.toml snippet and the equivalent YAML text appears instantly, which is handy for migrating configuration formats.
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How to Use
- Paste your TOML content, for example a Cargo.toml snippet, into the box on the left
- The converted YAML appears on the right in real time
- If the TOML is malformed, a specific error message is shown on the right instead
- Click "Load sample data" to see how a document with [section] tables is converted
Features
- Converts TOML tables ([section]) and key/value pairs into the equivalent YAML mapping structure
- Recognizes numbers and booleans and emits them without extra quotes, while strings keep their original text
- Converts as you type, with no button to press
- Shows a clear error message when the TOML cannot be parsed
Use Cases
Migrating a configuration format
Move project configuration from TOML to YAML, for instance when going from the Rust ecosystem to Kubernetes or CI configuration.
Standardizing configuration across languages
When different projects in a team use TOML and YAML, convert quickly while consolidating on a single format.
Reading Cargo.toml as YAML
Developers who are more comfortable with YAML can view a Rust Cargo.toml in the format they know best.
Learning how TOML maps to YAML
Compare the same configuration written in both formats to understand the syntax differences.
FAQ
Which parts of TOML are supported?
[section] tables and basic key/value pairs with string, number and boolean values are supported. More advanced syntax such as deeply nested tables, arrays of tables ([[array]]) and inline tables is not fully handled.
Can I control the indentation of the YAML output?
No. The output is generated with a consistent standard YAML indentation. If you need a specific layout, adjust the result afterwards with another YAML tool.
Why do I get a TOML parse error?
It usually means the TOML syntax is not valid. Check that table names and key/value pairs are written correctly and try again.
Is my data uploaded to a server?
No. The conversion runs entirely in your browser and nothing you paste leaves your machine.