JSON Flattener & Dot-Notation Mapper

Flatten deeply nested JSON objects and arrays into single-level dot-notated key-value pairs.

About this tool

Simplify nested data structures for database ingestion, spreadsheet export, or logging with dot notation.

How to use this tool

  1. Paste nested JSON into the editor.
  2. Click Run JSON Flattener.
  3. Copy the single-level flattened JSON map.

How it works

Traverses JSON structures recursively, joining parent and child keys with dot delimiters and array indices.

When to use this tool

  • Preparing nested JSON for CSV export or BigQuery tables.
  • Generating key paths for configuration systems and i18n localization keys.

Frequently asked questions

How are array items represented?

Array elements preserve bracket notation, e.g., items[0].name.

Limitations

Input must be valid JSON.

Privacy

No data is uploaded or logged.