TOML to YAML Converter
Paste a TOML document to instantly convert it into equivalent YAML, with tables becoming nested mappings and arrays becoming sequences. Free online developer tool.
Paste TOML
YAML Output
YAML output will appear here...
Free TOML to YAML Converter
Paste a TOML document to instantly convert it into equivalent YAML. Tables become nested YAML mappings and arrays become YAML sequences, so the structure of your config is preserved exactly.
How to Use It
Paste any TOML configuration into the input box, or click "Load Example" to see a sample run. The converter parses your TOML and renders the resulting object as YAML, updating live as you type.
Example
Given a TOML file with a top-level title key and an [owner] table containing a nested [owner.address] table, the tool produces a YAML document with titleat the root and an indented owner mapping whose address key is itself a nested mapping — matching the TOML table hierarchy.
Common Use Cases
- Migrating a Rust
Cargo.tomlor Pythonpyproject.tomlstyle config to a YAML-based tool. - Converting TOML application settings into YAML for Kubernetes or Docker Compose style configs.
- Comparing TOML and YAML representations of the same configuration side by side.
- Bootstrapping a YAML config file from an existing TOML one instead of retyping it by hand.
FAQs
Does this handle arrays of tables and nested tables correctly?
Yes — standard TOML constructs like arrays of tables ([[items]]), nested tables, and inline tables convert reliably for typical configuration files. Very unusual or deeply exotic TOML structures are rare in practice, but it's worth a quick visual check of the output for anything highly nonstandard.
How are TOML dates and times represented in YAML?
TOML date and datetime values are serialized using YAML's native timestamp representation, so tools that read the resulting YAML will typically parse them back into date objects automatically.
Is my TOML uploaded anywhere?
No — parsing and conversion happen entirely client-side in your browser. Nothing you paste is sent to a server.