Joynex

Developer Utility Tools — Free Online Tools

for Smarter Work

All-in-one browser toolkit for JSON formatting, encoding, timestamp conversion, and more — no downloads, no clutter. Save time with fast, secure, and easy-to-use online utilities. All processing runs in your browser; no data is sent to any server.

Trusted by developers, students, and content creators worldwide.

Developer Tools

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JSON Formatter
Format, minify, and validate JSON. Choose indent size and copy result.
Format JSON
Base64 Encoder / Decoder
Encode text to Base64 and decode Base64 to text. UTF-8 supported.
Encode / Decode
Timestamp Converter
Convert between Unix epoch (s/ms) and date/time. Live current time.
Convert Timestamp

Articles

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What Is JSON
JSON shows up in config files, API responses, and databases. If you’ve ever opened a response in the Network tab or edit…
Read
REST API Basics
REST is a style for designing web APIs that use HTTP methods and URLs. You’ll see it everywhere: public APIs, internal s…
Read
Git Basics Guide
Git tracks changes in your project and lets you collaborate through branches and merges. You don’t need to know every co…
Read
Understanding HTTP Status Codes
HTTP status codes tell the client whether a request succeeded, failed, and why. They’re part of every API and web respon…
Read
Environment Variables Explained
Environment variables are key-value pairs provided to your process by the OS or runtime. They’re the standard way to pas…
Read
Writing Clean Code
Clean code is easy to read and change. It’s not about being clever; it’s about naming things well, keeping functions sma…
Read
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How to use JSON Formatter

Format, validate, and minify JSON in three simple steps.

Paste or type JSON
Paste your JSON string into the input area, or type it directly. Invalid JSON will be highlighted so you can fix syntax errors.
Choose format and options
Select pretty-print or minify. Set indent size (e.g. 2 or 4 spaces). The tool validates and formats in real time.
Copy or use the result
Copy the formatted output to the clipboard with one click. Use it in your config files, API payloads, or documentation.
Try JSON Formatter

What developers say

Real feedback from people who use these tools daily.

Alex Chen@alexdev

The JSON formatter is my go-to for debugging API responses. Everything runs locally—no sending configs to third parties. Huge peace of mind for production configs.

Sam Rivera@sam_r

Base64 and timestamp tools saved me hours during a migration. Clean UI, no sign-up, no tracking. Exactly what a dev utility should be.

Frequently asked questions

Privacy, compatibility, and how the tools work.

More tools

Coming soon

We’re building more utilities. Here’s what’s in the pipeline.

Regex Tester
Test and debug regular expressions with real-time matching, group capture, and cheat sheet.
In development
Color Converter
Convert between HEX, RGB, HSL, and other color formats. Preview colors and copy in any format.
In development
Lorem Ipsum Generator
Generate placeholder text for design and development. Choose paragraphs, sentences, or words.
In development
Markdown Preview
Write Markdown and see a live preview side by side. Copy rendered HTML or the source.
In development