Why I Built JSONXMLKit: Free JSON/XML Tools That Run in Your Browser

M Makertoo — Tue, 22 Apr 2025 23:43:52 +0000

The Problem

As a developer, I often needed quick tools to inspect or convert JSON, XML, or Base64-encoded data. But most online tools had bloated interfaces, annoying ads, and required uploading files to third-party servers. That’s not always ideal — especially when working with sensitive information or debugging internal formats.

The Solution

I built JSONXMLKit — a set of fast, privacy-respecting tools that run entirely in your browser.

You can:

🧾 Format JSON or XML with syntax highlighting and indentation
🔍 Search and extract paths using JSONPath or XPath
🧬 Encode or decode files to/from Base64, supporting images, PDFs, text files, and more

All tools are client-side — no data is uploaded or logged.

Use Cases

Quickly debug a nested JSON response without installing anything
Extract a specific XML tag using XPath
Decode a Base64 string to verify payloads in JWTs or other APIs
Format large JSONs from APIs and extract values for QA or analytics

Who It’s For

Developers & frontend engineers
QA testers & technical analysts
Students or educators working with structured data

Why Build Another Tool?

Because dev tools should be:

Fast ✅
Free ✅
Focused ✅
Privacy-friendly ✅

The goal isn’t to replace complex desktop tools, but to make everyday dev workflows faster — in one tab, with no signups.

Try It

Check it out at https://jsonxmlkit.com — and let me know what features you'd like to see next.

🧵 Built with ❤️ using vanilla JS and minimal UI for max speed. Feedback welcome!