JSON Flatten / Unflatten

Nested JSON ↔ dot-notation keys

Free Online Tool

JSON Flatten — Complete Guide & Instructions

Convert nested JSON into single-level dot-notation keys — and back again. Works with arrays via numeric indices and detects the direction automatically.

How to Use JSON Flatten

  1. 1 Paste nested JSON or a flat dot-key map.
  2. 2 Click Convert.
  3. 3 Copy the result.

Key Features & Capabilities

  • Both directions auto-detected.
  • Array index support.
  • Table view of every leaf value.