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

Hey devs 👋

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

Why I built this

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 tools were slow, cluttered, or tracked data. So I built my own.

What it does

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

Key points

• 🚫 No signup
• 🔐 Client-side processing
• ⚡ Very fast
• 🌙 Dark & Light mode

👉 Try it here: https://jsonviewertool.com/

Feedback welcome 🙌