Coding Tools

The Best Online Coding Tools 2023

As a developer, your main tool is obviously the one that allows you to turn your ideas into code: A text editor. As time goes by, more online text editors are created that can help you code from any computer with Internet access. 

Pair programming, social coding, collaborative development. Whatever you want to call it, there’s been an explosion of tools for sharing, developing and debugging code in the browser. In this article, let’s take a look at the best useful online code editors.


Unminify JS, CSS and HTML Code

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This tool will unminify, reformat and reindent ugly JavaScript, CSS and HTML code, making it readable again.

Base64 Decode and Encode 

Super Handy Online Tool To Encode or Decode Your Data

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Decode from Base64 format or encode into it with various advanced options. This site has an easy to use online tool to convert your data.

HTML Color Codes

Get HTML Color Codes with Color Picker

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Easily find HTML color codes for your website using our color picker, color chart and HTML color names with Hex color codes, RGB and HSL values.

Code Beautify

Helps You To Beautify Your Code

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Online Tools like Beautifiers, Editors, Viewers, Minifier, Validators, Converters for Developers: XML, JSON, CSS, JavaScript, Java, C#, MXML, SQL, CSV, Excel.

Web Formatter

Free Online Tool To Format An Ugly HTML Code

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Format your HTML, XML, CSS, JavaScript, PHP and JSON code in a few easy steps. Paste your code into the text box, select the tab spacing that you want and click the format button.


Free Online Toolbox for developers

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Extends Class provides an online regex tester, which helps to test and debug regex. A regex visualizer is integrated and helps to understand regular expressions. It is also possible to generate strings corresponding to regular expressions.

Extends Class also provides: Syntax checkers (PHP, Python, Ruby), Playgounds (PHP, SQLite, MySQL, PostgreSQL), compare tools (XML, JSON, CSV), API tools (JSON storage, Mock, REST/SOAP clients) …


Online Text Editor & Wordpad For Notes

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EditPad is a simple and minimal online editor for web developers. Unlike most tools featured in this article, it doesn’t feature syntax highlighting, boilerplates or project management.

EditPad is just a plain page to type your text without any distractions. While definitely not the most powerful editor for web development, this “online notepad” can be a lifesaver on a particularly slow computer.


HTML, CSS & JavaScript Playground

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Liveweave is super simple to use. No need to log in, no sharing – no messing. Just open the page and start coding. Everything happens in a single view, so your JavaScript and styles all appear alongside the HTML. The resulting output runs in an adjoining pane.


Online CSS Sandbox

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CSSDesk is a online HTML/CSS sandbox. Experiment with CSS, see the results live, and share your code with others.


The Best Place To Build, Test, And Discover Front-end Code.

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CodePen is a social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn and debug, and find inspiration.


Share Code in Real-time with Developers

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An online code editor for interviews, troubleshooting, teaching & more… Share Code Now. Share code for free.


Online Code Editor

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Collabedit is an online code editor that lets people collaborate in real-time. It works in your web browser so no installation is needed. Try it now, no account necessary.


An Interactive CSS Playground

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Dabblet is an interactive playground for quickly testing snippets of CSS and HTML code. It uses -prefix-free, so that you won’t have to add any prefixes in your CSS code. You can save your work in Github gists, embed it in other websites and share it with others.


Test Your JavaScript, CSS, HTML or CoffeeScript Online

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JSFiddle is an online IDE service and online community for testing and showcasing user-created and collaborational HTML, CSS and JavaScript code snippets, known as ‘fiddles’. It allows for simulated AJAX calls.

DB Fiddle

SQL Database Playground

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An online SQL database playground for testing, debugging and sharing SQL snippets.


Collaborative JavaScript Debugging

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JS Bin is a tool that enables you to learn, experiment and teach using web technologies. There’s a mass of features packed inside of JS Bin, but the aim is to be part of your tool chain to help you solve problems, explore technology and teach others.


Detect Errors And Potential Problems In JavaScript Code

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JSHint is a static code analysis tool used in software development for checking if JavaScript source code complies with coding rules.

Play Code

Code Sandbox. Online Code Editor

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Similar to CodePen, Play Code is a fast and intuitive online text editor for front-end web development. This handy tool allows you to use libraries for HTML, CSS and JavaScript (jQuery, React, Vue, etc) while letting you see the result in real time.

TryIt Editor

W3Schools Online Code Editor

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Brought to you by W3Schools, TryIt editor lets users edit HTML, CSS and JavaScript code, and view the result in their browser. This online editor is very simple and doesn’t feature as many options as some others mentioned in our list, but it’s still a great tool, especially for testing new ideas and techniques.


Type Accent Marks, Diacritics And Other Characters Online

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TypeIt isn’t a code editor and I hesitated to feature it in this post. This handy tool helps you to access special characters such as French accents, as a visual keyboard does. Definitely a site to have in your bookmarks if you’re often working on multi-language sites.