Client-side
JSON Formatter Online: Format, Validate & Minify Instantly
Use this JSON formatter online to format, validate, and minify JSON instantly. Also converts XML to JSON and JSON to XML — all free, no server uploads.
Developer tools, guides,
and cheat sheets
Free browser-based tools, language guides, and quick-reference cheat sheets. Fast, distraction-free, and built for developers who ship.
Popular tools
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Base64 Encoder/Decoder — Free Online Tool
Encode and decode Base64 strings instantly in your browser. Supports standard text and URL-safe Base64 formats — no data sent to servers.
Client-side
Regex Tester — Free Online Tool
Test regular expressions against text with real-time match highlighting. See all matches, groups, and an explanation of your pattern.
Client-side
JWT Decoder — Free Online Tool
Decode and inspect JWT tokens instantly in your browser. Parses header, payload, and shows expiry. No verification — client-side only.
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All cheat sheets →CSS Border Cheat Sheet: Selectors and Properties
CSS border properties, selectors, the box model, colors, flexbox, and pseudo-classes covered in one quick-reference cheat sheet for web developers.
Markdown Cheat Sheet: Complete Reference for Developers
Markdown cheat sheet with horizontal rule markdown syntax, text formatting, links, tables, code blocks — your complete quick reference for writing docs.
Python String Methods: split, join, replace, strip & More
Python string methods cheatsheet: every built-in str method with syntax, working examples, and pitfalls — split, join, replace, strip, casefold, and more.
Git Commands Cheat Sheet
The complete git commands cheat sheet: setup, staging, branching, merging, remotes, stashing, history, undoing, and recovery — all in one place.
Linux Commands Cheat Sheet
Linux commands cheatsheet covering bash commands, file management, permissions, process control, networking, and terminal commands for developers.
Docker Commands Cheat Sheet
Complete docker commands cheatsheet covering docker run, Dockerfile, containers, images, volumes, networks, and Docker Compose for every stage of development.
Regex Cheat Sheet
The complete regex cheatsheet: character classes, anchors, quantifiers, groups, lookaheads, flags, and validation patterns for Python and JavaScript.
CSS Flexbox Cheat Sheet
Master CSS Flexbox with this cheat sheet covering flex container and flex item properties, alignment, ordering, and responsive layout patterns with examples.
Latest from the blog
All posts →C++ switch case, Loops, and Control Flow Explained
C++ switch case, for loops, while loops, and break statements with real code examples. Learn C++ control flow from basics to modern range-based loops.
C++ Substring Methods: substr, find and replace
C++ substring methods and string manipulation: learn substr(), find(), replace(), insert(), erase() and the conversions every C++ developer needs.
C++ map, vector, and STL Data Structures: Complete Guide
C++ map, vector, queue, and more — learn how each STL container works, when to use it, and see working code examples for every major data structure.
Python Modulo Operator: Math, Numbers, and Functions
Python modulo operator, number types, arithmetic operators, and built-in math functions explained with code examples for developers at every level.
How to Handle Exceptions in C++? A Complete Guide
Learn how to handle exceptions in C++ using try, catch, and throw. Covers exception hierarchies, RAII, noexcept, and real-world error handling patterns.
How to Use Data Classes in Kotlin?
Discover how to cleanly model object structures and state using Kotlin's Data Classes to eradicate extensive boilerplate and boilerplate property methods.