About NeatJSON
Free, fast, and private developer tools — built for everyday coding tasks.
What is NeatJSON?
NeatJSON is a collection of free online developer tools designed to help programmers, testers, and data engineers work more efficiently. Whether you need to format a JSON response, decode a JWT token, test a regex pattern, or convert between data formats, NeatJSON has you covered — no sign-up, no subscription, no limits.
Every tool on NeatJSON runs entirely in your browser. Your data never leaves your device and is never stored or transmitted to any server. This makes NeatJSON safe to use even with sensitive configuration data and API responses.
Our Tools
JSON Formatter
Beautify, minify, validate, and explore JSON with a tree view and search.
Base64 Encoder
Encode and decode text, images, and files to/from Base64 with drag-and-drop.
JWT Decoder
Decode and inspect JWT tokens — header, payload, and signature.
Regex Tester
Build, test, and debug regular expressions with real-time match highlighting.
URL Encoder
Encode and decode URLs and query strings safely.
CSV ⇄ JSON
Convert CSV data to JSON and JSON arrays back to CSV.
YAML ⇄ JSON
Convert between YAML and JSON configuration formats.
XML Beautifier
Format and validate XML documents for better readability.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.
Password Generator
Create strong, random passwords with customisable rules.
QR Generator
Generate QR codes for URLs, text, WiFi, and more. Download as PNG or SVG.
Color Picker
Pick colors and convert between HEX, RGB, HSL, and HSV formats.
Markdown Previewer
Write and preview Markdown with live rendering.
HTML Minifier
Remove whitespace and comments from HTML to reduce file size.
UUID Generator
Generate RFC 4122 UUIDs (v4) for use in databases and APIs.
Text Case
Convert text between camelCase, snake_case, Title Case, and more.
Our Values
Privacy First
All processing is client-side. Your data never leaves your browser.
Fast
No round-trips to servers. Every tool responds instantly.
Always Free
No paywalls, no rate limits, no account required.
Works Everywhere
Fully responsive — works on desktop, tablet, and mobile.
Why We Built NeatJSON
Developers spend a surprising amount of time on small, repetitive formatting and conversion tasks. Most of the time, these tasks don't need a full IDE or a complex library — they just need a clean, fast browser tool that works without any fuss.
NeatJSON was built to be exactly that: a reliable, lightweight toolkit that developers can bookmark and reach for throughout their workday. We focus on doing common tasks well rather than trying to do everything.
Contact
Have a suggestion for a new tool, found a bug, or just want to say hello? Visit our Contact page — we'd love to hear from you.