I built a free JSON formatter that never uploads your data — here's why that matters

Published: (March 4, 2026 at 02:22 AM EST)
1 min read
Source: Dev.to

Source: Dev.to

Introduction

If you’ve ever pasted an API response with credentials or sensitive data into an online JSON formatter, you’ve probably uploaded that data to a third‑party server without realizing it. Most online JSON tools process data server‑side, meaning your JSON is sent to their servers before being returned formatted.

How JSONStudio Works

I built JSONStudio (https://jsonstudio.online) so that everything runs 100 % in your browser using client‑side JavaScript. Your data never leaves your device.

Features

  • Handles authentication tokens securely (the data stays local).

Tech Stack

  • Pure client‑side JavaScript executed in the browser.

Try It

Try it at — feedback welcome!

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