YAML Unflattener

Paste a JSON object of flattened paths and values, reconstruct the nested data structure, and serialize YAML locally.

Flattened path/value JSON

Rebuilt YAML

ReadyInput must be a JSON object whose keys use this tool's reversible bracket-style flattened path syntax.

How to use this YAML Unflattener

Rebuild nested YAML from flattened bracket-style path/value mappings. 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.