I built a free JSON Viewer, Formatter & Converter for developers

Source: Dev.to

Introduction

Hey devs 👋

I built JSONViewerTool.com — a fast, free, browser‑based JSON utility suite for everyday developer work.

Why I Created It

While working with APIs and microservices, I kept switching between multiple tools just to:

• View JSON
• Validate it
• Convert JSON → CSV / Excel / YAML
• Decode JWTs

Most existing tools were slow, cluttered, or tracked data, so I decided to build my own solution.

Features

• JSON Viewer (Tree + Code)
• JSON Validator & Minifier
• JSON → CSV / Excel / YAML
• CSV → JSON
• JWT Decoder
• Base64 Encode / Decode
• UUID Generator

Benefits

• 🚫 No signup required
• 🔐 All processing happens client‑side
• ⚡ Very fast performance
• 🌙 Dark & Light mode support

Try It

👉 Try JSONViewerTool.com now

Feedback is welcome 🙌