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YAML Flattener

Convert nested mappings and arrays into path/value pairs designed for round-trip unflattening.

ReadyOutput is a JSON object keyed by reversible $["key"][0] paths so nested keys containing dots remain unambiguous.

How to use this YAML Flattener

Flatten nested YAML into reversible bracket-style paths and values. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.