Racira Developers

JSON Unflattener

Rebuild nested JSON from flat keys.

Input
Output
Enter input to see results
Runs entirely in your browser. No data leaves your device.

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What is Json Unflattener

The JSON Unflattener reverses the flattening process, taking dot-notation keys like "a.b.c" and reconstructing the nested object {a: {b: {c: value}}}. It handles arrays (using "items[0].name" notation), mixed nesting, and edge cases like numeric indices creating arrays versus string keys creating objects. The tool is essential for converting flat configuration files (like .env format) back into structured JSON, and for working with data that was flattened for storage in relational databases or spreadsheets.

How to Use Json Unflattener

  1. Step 1: Paste your input text into the textarea.
  2. Step 2: Click the Transform button to process the text.
  3. Step 3: The result appears in the output panel. Copy it using the built-in copy button.

Why Use Json Unflattener

Json Unflattener saves time by automating a common json task that would otherwise require manual effort, custom scripts, or tooling setup. Running entirely in your browser, it processes data instantly without network latency, upload concerns, or account requirements. Your data stays completely private on your device.

Privacy & Security

This tool runs entirely in your browser — no data ever leaves your device. There is no server round-trip, no upload, no logging, and no account required. Your input is processed locally using client-side JavaScript and is never stored, transmitted, or accessible to anyone else. When you close the tab, everything disappears.

Frequently Asked Questions

How does Json Unflattener handle my data?

<p>The tool processes your input entirely in your browser using JavaScript. No data is sent to any server or stored beyond the current session. Everything is ephemeral.</p>

What input formats are accepted?

<p>The tool accepts text input pasted into the textarea. It processes the text and displays the result in the output panel.</p>

Is there a usage limit?

<p>No. The tool runs entirely in your browser with no rate limiting, quotas, or account requirements. Use it as often as needed.</p>