Tools

Free Online Developer Tools

A curated collection of fast, free online developer tools by MaxonCodes. Use these tools to write, test, format, convert and understand code. Learn faster with practical developer cheat sheets and follow clear learning roadmaps to grow your skills step by step. No signup required.

HTML & CSS Compiler Online

Run HTML, CSS and JavaScript code online with live preview.

Code Formatter

Automatically format and beautify HTML, CSS, JavaScript and JSON code.

HTML Parser

Parse HTML code into clean, readable and structured text.

CSS Minifier

Minify and compress CSS files to improve website performance.

JSON Viewer

View, format and validate JSON data online.

Regex Tester

Test regular expressions online with instant results.

AI Code Explainer

Explain JavaScript, Python and Java code line by line.

Password Generator

Generate strong and secure passwords instantly.

Markdown to HTML Converter

Convert Markdown text into clean HTML instantly.

QR Code Generator

Create QR codes for URLs, text and custom data.

Text Utilities for Developers

Free text processing tools to convert case, compare text, remove duplicates, sort lines and analyze word counts.

Case Converter

Convert text to lowercase, UPPERCASE, camelCase, snake_case and more.

Text Diff Checker

Compare two texts and highlight added, removed and changed lines.

Word & Character Counter

Count words, characters, sentences and estimated reading time.

Remove Duplicate Lines

Remove duplicate lines from text, logs or lists instantly.

Text Sorter

Sort lines alphabetically, reverse order or by length.

Web Developer Tools

Essential frontend developer tools for HTML, CSS and layout design. Build, convert and visualize modern web layouts faster.

HTML to JSX Converter

Convert HTML markup into clean JSX for React projects.

CSS Unit Converter

Convert px, rem, em, %, vw and vh units instantly.

CSS Gradient Generator

Create linear and radial gradients with live preview.

Box Shadow Generator

Design CSS box shadows visually and copy the code.

Border Radius Generator

Create smooth rounded corners with visual controls.

Flexbox Playground

Experiment with Flexbox alignment and layout visually.

Grid Layout Generator

Build CSS grid layouts visually and export the code.

JSON & Data Conversion Tools

Convert, format and visualize structured data including JSON, CSV, XML and SQL with developer-friendly tools.

JSON ⇄ CSV Converter

Convert JSON data to CSV and back with ease.

JSON to Table Viewer

Paste JSON and view it as a clean, readable table.

XML to JSON Converter

Convert XML data into structured JSON format.

SQL Formatter

Format and beautify SQL queries for better readability.

Encoding, Decoding & Time Tools

Decode JWT tokens, convert timestamps, parse URLs and encode images using secure developer utilities.

JWT Decoder

Decode JSON Web Tokens and inspect payload data.

Base64 Image Encoder

Convert images to Base64 strings instantly.

URL Parser

Break down URLs into protocol, host, path and params.

Timestamp Converter

Convert Unix timestamps to human-readable dates.

Design & Frontend Helper Tools

Frontend design tools for colors, SVGs, icons and visual assets used in modern web projects.

Color Format Converter

Convert HEX, RGB, HSL and other color formats.

Image to CSS

Generate Base64 CSS backgrounds from images.

Favicon Generator

Create favicons in multiple sizes from one image.

SVG Optimizer

Optimize SVG files by removing extra spaces and comments.

Tools for Coding Learners

Beginner-friendly tools to visualize algorithms, generate code screenshots and stay motivated while learning.

Code Screenshot Generator

Turn code snippets into beautiful shareable images.

Algorithm Visualizer

Visualize sorting algorithms like bubble sort step by step.

Are MaxonCodes developer tools free?

Yes. All developer tools on MaxonCodes are completely free to use.

Do I need to sign up?

No. You can use all tools without creating an account.

Is my code stored on your servers?

No. Your code is processed in your browser and never stored.

Who are these tools for?

These tools are built for developers, programmers, students and learners.