About TOML to YAML Converter
Paste TOML and get YAML output in real time. Handles [sections] (converted to nested YAML objects), inline arrays, and [[array-of-tables]] (converted to YAML sequences of objects). Choose between 2-space and 4-space YAML indentation. Use the swap button to switch to YAML → TOML. All processing runs in your browser.
Frequently Asked Questions
What is TOML to YAML conversion?
TOML to YAML conversion parses a TOML configuration file and rewrites it in YAML syntax. YAML is preferred when you need comments in-line with data, anchors for value reuse, or compatibility with tools that require YAML input such as Ansible and Kubernetes.
What data types are lost or changed when converting TOML to YAML?
TOML datetimes convert to YAML timestamp scalars (well-preserved). TOML's explicit integer bases (hex 0xFF, octal 0o77, binary 0b11) become decimal integers in YAML. TOML's inf and nan floats have no YAML equivalent and may become strings. All other types — strings, booleans, plain numbers, arrays, and tables — convert faithfully.
Can YAML anchors be generated during TOML-to-YAML conversion?
No. Anchors require identifying repeated values in the source data, which is beyond the scope of a structural converter. The output is a standard YAML document without anchors. If your TOML has repeated blocks, add anchors manually in the YAML output for DRY configuration.
How are TOML array-of-tables converted to YAML?
TOML [[sections]] become a YAML list of mappings under the section key. [[servers]] with two entries becomes servers: followed by two - blocks. This is the standard YAML equivalent and works correctly with Kubernetes, Ansible, and other YAML-consuming tools.
Why would I convert TOML to YAML?
Common reasons: migrating a project to a tool that expects YAML (Kubernetes, Helm, Ansible), sharing configuration with a team that standardises on YAML, or feeding a TOML config file into a pipeline that only reads YAML. For new projects, choose the format your tooling ecosystem expects to avoid ongoing conversion.
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