Which programming languages are supported?

The editor supports HTML, CSS, JavaScript, Bootstrap 4, PHP, Python, C, C++, Java, and MySQL. Frontend languages run directly in the browser with live preview; backend languages are executed on a secure server.

Is this online code editor free to use?

Yes, CodePractice Universal Try It Editor is completely free to use. No signup or installation is required.

How does the live preview work?

For HTML, CSS, JavaScript, and Bootstrap 4, the editor renders your code instantly inside a sandboxed iframe in the browser — no server round-trip needed. You see the result in real time.

How are PHP, Python, C, C++ and Java executed?

Backend languages are sent to a secure server-side execution engine (Judge0). Your code runs in an isolated sandbox and the output is returned to the browser within seconds.

Can I run MySQL queries online?

Yes. The editor supports MySQL queries. You can write SELECT, SHOW, DESCRIBE, and TEMPORARY table operations and see formatted table output directly in the editor.

Is there a keyboard shortcut to run code?

Yes. Press Ctrl+Enter (Windows/Linux) or Cmd+Enter (Mac) to run your code instantly from the editor.

Does the editor work on mobile?

Yes. The Universal Try It Editor is fully responsive and works on mobile phones, tablets, and desktop browsers.

Online Code Editor — Run HTML, CSS, JS, PHP, Python & More

💡

Instant Live Preview

HTML, CSS, JS and Bootstrap 4 render instantly in a sandboxed iframe. No page reload needed.

⚙️

Server-side Execution

PHP, Python, C, C++ and Java run on a secure server. Output returned within seconds.

📈

MySQL Query Runner

Write and run SELECT, SHOW, DESCRIBE queries. Results display in a clean table format.

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Keyboard Shortcuts

Press Ctrl+Enter to run. Tab inserts 4 spaces. Works on all devices.

3 Steps to Run Your First Program

No account, no installation — just pick a language and start coding.

Pick a Language

Select from HTML, CSS, JS, Bootstrap, PHP, Python, C, C++, Java, or MySQL using the language picker above.

Write or Paste Your Code

Type in the editor or click Sample to load a ready-to-run snippet for the selected language.

Hit Run & See Output

Press the Run Code button or use Ctrl+Enter. Results appear instantly in the right panel.

Language	Execution Mode	Live Preview	Free	Best For
HTML	Browser	✓	✓	Web page structure
CSS	Browser	✓	✓	Styling & layout
JavaScript	Browser	✓	✓	Frontend scripting
Bootstrap 4	Browser	✓	✓	Responsive UI
PHP	Server	✗	✓	Server-side scripting
Python	Server	✗	✓	Data & scripting
C	Server	✗	✓	Systems programming
C++	Server	✗	✓	Competitive programming
Java	Server	✗	✓	OOP & enterprise apps
MySQL	Server	✗	✓	Database queries

Frequently Asked Questions

Everything you need to know about the Universal Try It Editor.

CodePractice Universal Try It Editor is a free browser-based code editor that lets you write and run code in multiple programming languages — HTML, CSS, JavaScript, Bootstrap, PHP, Python, C, C++, Java, and MySQL — without installing any software. It is ideal for students, beginners, and developers who want to quickly test code snippets.

The editor currently supports 10 languages: HTML, CSS, JavaScript, Bootstrap 4, PHP, Python, C, C++, Java, and MySQL. Frontend languages render live in the browser; backend languages execute on a secure server.

Yes, 100% free. No account, no signup, no credit card required. Simply open the editor, choose your language, write your code, and click Run.

For HTML, CSS, JavaScript, and Bootstrap 4, your code is rendered inside a sandboxed <iframe> directly in the browser. There is no server round-trip — the output is instant. For JavaScript, console.log() output is captured and displayed in a built-in console panel inside the preview.

Backend languages are submitted to a secure server-side execution engine (Judge0). Your code runs inside an isolated sandbox environment. The standard output (stdout) and any errors (stderr) are returned to your browser within seconds.

Yes. Select MySQL from the language picker, write your SQL query, and click Run. Results are shown in a neatly formatted table. Supported operations include SELECT, SHOW, DESCRIBE, EXPLAIN, and CREATE TEMPORARY TABLE.

Ctrl+Enter (or Cmd+Enter on Mac) runs your code instantly. The Tab key inserts 4 spaces instead of moving focus, making it easy to write indented code.

Yes. The Universal Try It Editor is fully responsive and works on all modern browsers — desktop, tablet, and mobile. The language selector is horizontally scrollable on small screens for a smooth mobile experience.

Why Choose the CodePractice Try It Editor?

The CodePractice Universal Try It Editor is a free, browser-based online code editor designed for developers, students, and coding enthusiasts who want to quickly write, test, and run code without setting up a local development environment. Whether you are learning your first programming language or prototyping a new idea, this editor gives you an instant playground.

Run HTML, CSS and JavaScript Instantly

Writing and previewing HTML online has never been easier. Type your markup, add CSS styles, and sprinkle in JavaScript — the live preview pane renders everything instantly inside a sandboxed iframe. The editor also supports Bootstrap 4, letting you build responsive layouts and UI components without any local setup.

The built-in JavaScript console captures console.log(), console.error(), and console.warn() output and displays it in a styled terminal panel inside the preview — just like browser DevTools, right inside the editor.

Execute PHP, Python, C, C++ and Java on the Server

Backend languages are executed on a secure server-side engine. This means you can run PHP, Python, C, C++, and Java — all from the same editor interface. Your code runs in an isolated sandbox, and the output is returned to your browser within seconds.

PHP — Test server-side scripts, string functions, and array operations.
Python — Run data processing scripts, algorithms, and practice exercises.
C — Compile and run programs including stdio, arrays, and pointers.
C++ — Test OOP concepts, STL, and competitive programming solutions.
Java — Execute classes with a standard main() method.

Write and Test MySQL Queries Online

The built-in MySQL query editor lets you write and execute SQL queries directly in the browser. Results are displayed in a clean, formatted table — perfect for learning SQL, practising database queries, and testing SELECT statements without needing a local MySQL installation.

Key Features at a Glance

✓ Completely free — no account or credit card required
✓ Supports 10 programming languages in one place
✓ Instant live preview for frontend (HTML, CSS, JS, Bootstrap)
✓ Secure server execution for backend (PHP, Python, C, C++, Java)
✓ MySQL query runner with formatted table output
✓ Built-in JavaScript console capture
✓ Keyboard shortcut Ctrl+Enter for fast iteration
✓ Fully responsive — works on mobile, tablet and desktop
✓ Sample code for every language — great for beginners

Programming Language

Web Development

Other Languages