Major features

A practical workspace for the complete web-project loop

Move from an idea to working browser code, understand errors, collaborate safely, and keep a portable copy. Each major feature solves a specific part of that workflow.

Feature 01 · Write

Smart editing that stays close to the web platform

Syntax colors, project-aware suggestions, Emmet-style HTML expansion, filename completion, and line-aware diagnostics help without hiding the HTML, CSS, and JavaScript you are learning.

HTML, CSS, JavaScript, JSON, environment, and backend files
Suggestions learn project classes, IDs, variables, and filenames
Diagnostics identify the relevant file, line, column, and token

Developer planning code beside a large application screen. — Smart editing

Feature 02 · Organize

Real project files, not one disposable snippet

Create linked pages, stylesheets, scripts, JSON, media, and environment files. Import an archive, save in the browser, and export a ZIP when you need a backup you control.

Multi-file explorer with project-safe filenames
Media, starter templates, saves, and unsaved-work recovery
Portable ZIP import and export

Developer organizing image and document files around a project. — Multi-file projects

Feature 03 · See and debug

Preview, inspect, refresh, and understand the result

The preview connects source to output. Refresh deliberately, inspect rendered HTML with syntax highlighting, adjust zoom, follow project links, and use the console to trace JavaScript.

Live or manual preview updates with refresh
Element inspection with matching highlighted markup
Console output and clickable diagnostic locations

Developer building and reviewing a website interface. — Live preview

Feature 04 · Collaborate

Live teamwork with visible roles and host controls

Sessions include chat, unread badges, waiting-room approval, roles, custom cursors, file visibility, and controls that help the host manage access.

Host, co-host, and participant permissions
Hidden files disappear from affected participants' tabs
Group and private chat with unread counts capped at 99+

Three teammates collaborating live in the same browser workspace. — Live collaboration

Feature 05 · Save and share

Choose local saves, GitHub commits, or public publishing

Keep a browser copy, export a ZIP, connect GitHub through OAuth for repository work, or create a public view-only link after reviewing every included file.

Repository browsing, file creation, uploads, edits, and commits
Optional commit messages and repository refresh
Public links kept separate from editable collaboration sessions

Developer working with a visual version-control branch history. — Save and share

Feature 06 · Extend

Optional Node.js, fonts, icons, and focused layouts

Run packages or a server in the browser-isolated Node.js mode. Browse fonts and icons, customize Google Font weight and spacing, or reduce distractions with Zen Mode and the phone editor layout.

Terminal commands, dependencies, server detection, and localhost bridging
Fontsource, Google Fonts, and Font Awesome helpers
Theme, sizing, Zen, and mobile-focused controls

Local server connected to a browser development screen. — Node.js runtime

How CodX Editor Compares

A practical comparison of documented project workflows, runtime options, collaboration, and project portability.

	CodX Editor Open Editor	CodePen	JSFiddle	StackBlitz	Replit
Web preview	Live or manual	Integrated preview	Run / Result panel	Integrated preview	Live preview
Multi-file projects	Included	Plan-limited; 3 files on Free	3 fixed code panels	File tree	File tree
Node.js development	Optional browser runtime	Front-end packages; no Node runtime	Browser code only	WebContainers runtime	Cloud runtime and shell
Real-time collaboration	Included sessions	Owner needs PRO	Listed; limits unclear	Team editing; live presence not documented	Core / Pro seats
Collaboration controls & communication	Roles, host controls, group + private chat	Viewer / editor roles	Not detailed in docs	Team roles and access	Cursor presence; external team chat
ZIP project transfer	Import + export	Export; sign-in required	Not documented	Download in non-Codeflow projects	Import + export
GitHub workflow	Browse, edit, upload + commit	No repo editing in current docs	Display from repo / Gist	Connect + commit	Import, sync + push
Works offline	Edit + preview run in your browser	Needs a connection	Needs a connection	Cached after first load	Cloud runtime required

Why CodX Editor Feels Better

Instant Feedback Loop

Type, run, and preview in one place with built-in console output, jumpable errors, and red inline highlights that surface issues fast.

Preview + Debugging

Collaboration That Stays In Context

Share a collaboration link, chat as a group or privately, and see live collaborator cursors without leaving the editor.

Links + Chat + Live Cursors

Focused Coding Experience

Use smart HTML suggestions, font tools, ZIP project workflows, and Zen Mode when you want the interface to disappear and the code to take over.

Suggestions + Zen Mode

How It Works

Create or Open A Project

Launch CodX Editor, create files, and organize your HTML, CSS, and JavaScript in one place.

Code With Smart Tools

Use syntax highlighting, tag and attribute suggestions, jumpable error badges, and inline error highlighting to code faster with fewer mistakes.

Preview, Share, Collaborate

Run your project instantly, generate a collaboration link, chat in real time, and build together with live collaborator cursors.

Use Cases

Students

Practice coding exercises quickly in class or at home without complex setup.

Frontend Developers

Prototype UI ideas, test snippets, use Zen Mode for focused work, and share working demos with teammates and clients.

Teachers & Mentors

Create live coding sessions and review projects with learners using collaboration tools.

Start Your Next Project Today

No install, no waiting. Open CodX Editor and turn ideas into working projects in minutes.

Launch CodX Editor Learn More

Browser-first workflow

A complete web project loop in one tab

CodX Editor is designed around the actual loop used to build a small web project: create files, write code, inspect the result, diagnose a problem, save a version, and share it. The workspace keeps those actions close together so a learner can understand how HTML, CSS, and JavaScript connect instead of treating them as unrelated snippets.

Project structure

Create multiple source files, add media, switch between files, and keep related assets together. File-name rules help avoid broken browser paths when a project is exported or shared.

Visible results

Render the current HTML page beside the editor, follow links between project pages, inspect preview markup, and use the console to connect code with browser behavior.

Actionable debugging

Read errors with file, line, and column details. Jump back to the reported location and use highlighted tokens as a starting point instead of guessing where the problem began.

Practical project path

From a blank file to a shareable result

A browser editor is most useful when it helps you finish a task. This is the intended CodX Editor workflow for a small site, classroom exercise, or interface prototype.

Start with a real project

Choose a starter, open saved work, import a ZIP, or begin with separate HTML, CSS, and JavaScript files. The starter gives you a working relationship between the files that you can inspect and change.

Build with feedback

Use suggestions and Emmet-style HTML expansion while you write. Run the page, check the preview at different zoom levels, and keep the console visible when learning JavaScript events or conditions.

Keep a portable copy

Save a browser copy for convenience and export a ZIP when you need a backup you control. If you connect GitHub, you can also edit repository files and create a commit with an optional message.

Share intentionally

Publish a view-only project link for an audience, or create a collaboration session when people need to edit together. Those are different jobs, so CodX Editor keeps publishing and live collaboration separate.

Learn by changing things

Useful for lessons, prototypes, and focused experiments

Beginners can see exactly which file controls structure, appearance, and behavior. Teachers can prepare a starter and use collaboration controls to guide a room. Experienced frontend developers can isolate a layout idea or reproduce a browser bug without creating a full local repository first. For larger applications, the optional Node.js runtime supports package installation and server commands in an isolated browser environment.

Know the boundary: CodX Editor is ideal for learning, demos, prototypes, and shareable web projects. Important production work should also be backed up in a ZIP or version-control repository, and secrets should never be placed in client-side code or a public project.

Frequently asked questions

Questions? Start here.

Quick answers about creating, saving, transferring, collaborating, and sharing with CodX Editor.

Do I need to install anything?

No. The standard HTML, CSS, and JavaScript workspace runs in a current browser with JavaScript and local storage enabled.

What can I build in CodX Editor?

You can build multi-file websites, lessons, prototypes, interactive demos, and browser projects. Optional Node.js support is available for projects that need packages or a development server.

Where are my saved projects kept?

Normal saves and drafts are stored in your browser. For important work, export a ZIP or commit to GitHub so you also have a portable backup.

Can I move my projects to another device?

Yes. Device Transfer moves projects and settings using a one-time code, link, or QR code. You can replace the current editor or keep it open while importing.

Can other people code with me?

Yes. Collaboration sessions include visible cursors, chat, roles, host controls, and an optional waiting room. Only share editable session links with people you trust.

Can I publish or connect GitHub?

Yes. You can create a view-only published link or connect GitHub to browse repositories, edit files, upload changes, and create commits.

Does CodX Editor work on phones and tablets?

Yes. Phones and portrait tablets use focused Files, Editor, Preview, and Console tabs, while landscape tablets use the laptop-style split workspace.

Where can I learn every feature?

Open the Help page for the complete handbook, or launch the guided tour inside the editor for a step-by-step introduction.

Still need help?Open the complete CodX Editor handbook

Ready to revolutionize your coding workflow?

Click Here to Launch CodX Editor

No downloads • No installations • No account needed

HTML5 CSS3 JavaScript Real-time

Code, preview, run, and collaborate in one place.

Build and preview web apps instantly