Learn to Code Free — Programming Tutorials, Courses & Practice

Master JavaScript, Python, React, TypeScript, Next.js and SQL with free hands-on tutorials, coding practice, developer tools and career roadmaps. No signup required to start.

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Hands-On Practice

Fill-in-the-blank and multiple-choice quizzes give instant feedback on every lesson.

9 Languages

Learn in English, Khmer, French, Japanese, Korean, Vietnamese, Chinese, Indonesian, or Spanish.

Run Code Live

Edit and run JavaScript, HTML, and CSS examples right in the lesson — no setup required.

6 Free Tools

JSON formatter, JWT decoder, UUID generator, and more. No signup required.

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Featured Learning Categories

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Developer Tools

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JSON Formatter

Paste JSON and format it with readable indentation.

JSON Validator

Check whether a JSON document is syntactically valid.

JSON Minifier

Remove whitespace from JSON to make it as compact as possible.

UUID Generator

Generate random version 4 UUIDs.

Learn to Code Free — Programming Tutorials, Courses & Practice

Hands-On Practice

9 Languages

Run Code Live

6 Free Tools

Featured Learning Categories

Developer Tools

JSON Formatter

JSON Validator

JSON Minifier

UUID Generator

Base64 Encoder / Decoder

JWT Decoder

Next.js

Angular

Dart

Flutter

Swift

Kotlin