JSON Unflatten
JSON Unflatten is a free online JSON Tools tool that expand dotted-key JSON back into nested objects and arrays instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Description
Expand dotted-key JSON back into nested objects and arrays.
- Because everything is computed client-side, JSON Unflatten is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using JSON Unflatten takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Examples
These ready-made examples show typical inputs and the exact output JSON Unflatten produces for them.
{"user.name":"Ada","user.tags[0]":"a","count":2}Dotted keys expanded back into nested objects and arrays.
Use cases
Common situations where JSON Unflatten helps:
- Expand dotted-key JSON back into nested objects and arrays.
- Because everything is computed client-side, JSON Unflatten is safe to use with sensitive data such as API keys, tokens or private logs.
FAQ
What is JSON Unflatten?
JSON Unflatten expand dotted-key JSON back into nested objects and arrays. It runs entirely in your browser, so your data stays private.
Is JSON Unflatten free to use?
Yes. JSON Unflatten is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.