{"id":252,"date":"2025-08-21T20:34:29","date_gmt":"2025-08-22T00:34:29","guid":{"rendered":"http:\/\/localhost\/codlico\/?post_type=tools&p=252"},"modified":"2026-01-11T08:49:52","modified_gmt":"2026-01-11T13:49:52","slug":"html-editor-online","status":"publish","type":"tools","link":"https:\/\/codlico.com\/tools\/html-editor-online\/","title":{"rendered":"Online HTML Editor: Live Preview & Run HTML, CSS & JS"},"content":{"rendered":"

Are you looking for a way to write code online that is easy to use and gives you the features you need? Meet the Codlico HTML Editor. It is an online tool that makes your coding easier and more fun. The editor is developed in three sub-editors: one for HTML, a second for CSS, and a third for JavaScript. Each editor includes different tools to help you create web projects without extra work.<\/p>

First, you’ll write a code. Next you format it and preview the project. In addition, during coding, the editor guides you step by step about its features.<\/p>

In this tool, you can write HTML<\/a>, CSS<\/a>, and JS<\/a> while also instantly formatting and previewing the code. Also, with shortcuts you can move a line or code block up or down, copy, cut, paste, or select text quickly. On the other hand, if your code is not well formatted so the formatter will fix it in milliseconds. For example, you press Ctrl + I<\/code>, and the formatter cleans the code.<\/p>

Whether you are a beginner learning frontend basics or a pro who wants a smooth coding flow, the Codlico HTML Editor fits your needs. In this post, I will show you the editor’s features and how the editor makes the coding process easier and more enjoyable. Now, let’s break down the features.<\/p>

\n
\"Code
The editors show separate code editor for HTML, CSS, and JS. Each file is named index.html, style.css, and script.js.<\/figcaption><\/figure>\n<\/div>
<\/div>

HTML Editor<\/h2>

The HTML Editor is where you build a web page structure with tags and elements. You write HTML code such as tags, attributes, and other elements. First, in the style tag you write will inline CSS or link an external stylesheet. Similarly, you place JavaScript in the script tag or connect an external script file.<\/p>

<\/div>

CSS Editor<\/h2>

Now, the CSS Editor is your styling place. This is where you create styles for your HTML or develop an external stylesheet. It also includes line numbering, code folding, error detection, shortcuts, and a formatter. In addition, it has a color picker tool that helps you avoid guessing hex codes. For example, turn it on, pick a color, and the tool inserts the value into your code.<\/p>

<\/div>

JS Editor<\/h2>

The JS Editor adds behavior to web pages. This editor only supports JS code in which you write code to make elements movable, respond to specific click functions, or manipulate. Moreover, there are line numbers, which help to track the code; code block expand\/collapse; errors and syntax checker; handy shortcuts; and a code formatter, so with these features you can easily keep your code clean and make it easier to work with.<\/p>

Briefly, the HTML, CSS, and JS editors have helpful tools for building, styling, and scripting. So, you complete all tasks in a few steps and with fewer errors in one place.<\/p>

<\/div>

Real-Time Instant Preview\/Output<\/h2>

Suppose that you’re drawing a design on your tablet, and each line instantly appears on the screen. Similarly, the real-time instant preview in this HTML editor does for your code. Even if you’re coding in any editor so each change is automatically displayed on the live preview. For example, adding a button or changing a color shows up live in the output. There are no delays.<\/p>

First, you don’t switch between writing code and checking the result. Each keystroke shows your work right away. This speeds your work and keeps your focus.<\/p>

In addition, you add libraries and web fonts without copying and pasting code. You plug in Bootstrap for layouts and Font Awesome for icons with no extra steps. This saves time.<\/p>

<\/div>

Open Existing File (.html, .css & .js)<\/h2>

Open supported files like .html, .css, and .js from your device. The process is simple; first of all, click on the “Open” button or press (Ctrl + O<\/code>) to browse files, then double-click on a supported file, and the code will load to the editor. In the same way, it also supports drag and drop for opening files. Normally, drag a file and drop it into the editor so the file will open without extra steps. For example, drop index.html to open that page. You can then edit HTML, CSS, or JavaScript.<\/p>

<\/div>

Downloads: Code and Preview<\/h2>

Ready to save your code? The HTML Editor lets you download a single file, all your code at once, or a preview of your project. It makes the process quick and simple. Next, you see how to save and share your work with a few clicks.<\/p>

<\/div>

Single & Zip Code Files Download<\/h3>

If you want to save one file from the HTML, CSS, or JavaScript editor, click the “Save” button or press Ctrl-S<\/code>. The file is then downloaded to your device.<\/p>

If you want to download all your code files, click the “Zip Download” button or press Ctrl-K<\/code>. The editor bundles all the files into one zip file. Then you can transfer or store all the files together.<\/p>

<\/div>

Download Preview as JPG & PDF<\/h3>

If you want to save a view of your project, go to the preview section and click the JPG button at the bottom left or press F10<\/code>. Then the preview downloads as a JPG image.<\/p>

If you prefer a PDF, click the PDF button in the same spot or press F12<\/code>. Then the preview downloads as a PDF.<\/p>

These download options enable you to save or share your code and its previews. Use these buttons to save, download, or share your project.<\/p>

\n
\"Two
The image shows two buttons that enable you to download or export the preview in JPG or PDF format. Select one of the buttons to proceed.<\/figcaption><\/figure>\n<\/div>
<\/div>

Appearance & Modes<\/h2>

Do you ever wonder what makes an editor easy to use? The HTML Editor shows a clear look and several modes that help you write code and view results. We review how it looks and how you can change its layout and behavior.<\/p>

<\/div>

Action Panel<\/h3>

You use this panel to run common actions quickly. Additionally, it groups the tools you need to keep coding without extra clicks.<\/p>

<\/div>

Open Existing File<\/h4>

You click this to load .html, .css, or .js files into the editor. This opens files you are already working on.<\/p>

<\/div>

Save File<\/h4>

You click this to download the file you are editing. In addition, it saves a copy to your device.<\/p>

<\/div>

Download All as ZIP File<\/h4>

You click this to download all project files in one ZIP file. Consequently, you get a single archive for the whole project.<\/p>

<\/div>

Indent\/Format Code<\/h4>

You use this to tidy your code automatically. As a result, the code has consistent layout and spacing.<\/p>

<\/div>

Search in Code<\/h4>

You use this to find text in your project fast. For example, you can search for a class name or a tag.<\/p>

<\/div>

Reset Editor Names<\/h4>

You click this to return editor titles to their default names. Moreover, this helps if you rename tabs and want to undo the changes.<\/p>

\n
\"Gray
The panel shows icons and labels that represent user actions. Refer to each icon and label to identify the actions.<\/figcaption><\/figure>\n<\/div>
<\/div>

65+ Devices Preview<\/h3>

You choose from over 65 device sizes or enter a custom size to test responsiveness in real time. In particular, you can check how the layout adapts to different screen widths.<\/p>

<\/div>

Layout Modes<\/h3>

You change how you view the editor and the output by switching layout modes. First, you can view only the preview. Second, you can view only the code. Third, you can view both at once.<\/p>

<\/div>

Full Preview Mode<\/h4>

This mode shows only the project output and hides the editors. As a result, you focus on the final page.<\/p>

<\/div>

Full Code Editor Mode<\/h4>

Full code editor mode shows only the code editors and hides the preview. Therefore, you focus on writing and editing code.<\/p>

<\/div>

Column Mode (Code + Preview)<\/h4>

Column mode shows the code editor on the left and the preview on the right side of the app. This enables editing and testing of results at the same time.<\/p>

<\/div>

Dark\/Light Mode<\/h3>

This feature toggles between dark and light themes to reduce eye strain or to match your preference. Additionally, the setting applies to the editors and the interface.<\/p>

<\/div>

Full Screen Mode<\/h3>

You expand the editor to fill the screen or exit full screen when you finish. This mode gives you more space for editing and viewing.<\/p>

Editor Resizing Mode<\/h3>

The editor’s default size is 700px, and also you can stretch it to full screen or shrink it back to its default size. Consequently, you have control over how much space is needed for the editor.<\/p>

\n
\"Tools
The image displays tools for devices, layout toggle, toolkit, library management, light or dark mode, full screen, and info panel. Use each tool to adjust the workspace.<\/figcaption><\/figure>\n<\/div>
<\/div>

Editor & Preview Navigation<\/h2>

You are ready to work through your code. The HTML Editor’s navigation tools help you code more easily. We explore how these features add value to your workflow.<\/p>

    \n
  • Line Number: <\/strong>Every code row gets a clear number. You see the size of your project at a glance.<\/li>\n\n\n\n
  • Folding and Unfolding Code Blocks (Collapse\/Expand): <\/strong>You hide or show sections such as HTML’s <body><\/code>, CSS {}<\/code> or JS {}<\/code> with a click or press Ctrl-Q<\/code>. This helps you focus on the area you need.<\/li>\n\n\n\n
  • HTML Tags Hints:<\/strong> When you type a tag, the editor suggests options to keep you moving faster.<\/li>\n\n\n\n
  • Attributes and Token Hints in Tag: <\/strong>The editor shows attribute suggestions for tags. For example, it shows the attribute “href<\/code>” in <a><\/code> and hints inside style and script tags.<\/li>\n\n\n\n
  • CSS Hints: <\/strong>The CSS editor shows property and value hints as you type. This helps you choose the right rule.<\/li>\n\n\n\n
  • JavaScript Hints: <\/strong>The JS editor shows keyword and method suggestions at the right time to help you write code faster.<\/li>\n\n\n\n
  • Colored Code (Both in Light and Dark Mode): <\/strong>Code uses color in light and dark themes so you read it more easily.<\/li>\n\n\n\n
  • Find & Replace: <\/strong>You search for code parts and swap them, including support for regex for power users.<\/li>\n\n\n\n
  • Active Line or Cursor Line Highlight: <\/strong>The editor highlights your current line so you always know where you are.<\/li>\n\n\n\n
  • Status Bar: <\/strong>The bottom-right bar shows your cursor line and column, plus total lines and character count. You track position and size this way.<\/li>\n\n\n\n
  • Built-in Code Error Checker: <\/strong>Errors and warnings get highlighted with clear marks. You spot and fix problems faster.<\/li>\n\n\n\n
  • Brackets Matching: <\/strong>Matching brackets light up so your code stays structured.<\/li>\n\n\n\n
  • HTML Tags Matching: <\/strong>HTML tags glow to show their pairs, which helps you avoid unclosed tags.<\/li>\n\n\n\n
  • Auto Close Brackets and Tags:<\/strong> When you start a bracket or tag, the editor finishes it for you. This saves a step.<\/li>\n\n\n\n
  • Auto Complete: <\/strong>The editor predicts and completes code as you type. You accept suggestions to keep flow.<\/li>\n\n\n\n
  • Color Picker in CSS Editor: <\/strong>You pick colors directly in the CSS editor to set styles quickly.<\/li>\n\n\n\n
  • Editor Zoom: <\/strong>You change the code view size with zoom in or out to fit your needs.<\/li>\n\n\n\n
  • Preview Zoom: <\/strong>You scale the live preview to check visual detail.<\/li>\n<\/ul>
    \n
    \"Editor
    The image shows a zoom control panel in the editor with zoom in and zoom out buttons, along with a color picker tool. Use them to adjust view and color.<\/figcaption><\/figure>\n\n\n\n
    \"Preview
    The image shows a preview zoom panel that includes tools for toggling zoom mode, setting preview update frequency, and turning scroll preserve on or off.<\/figcaption><\/figure>\n\n\n\n
    \"Editor
    The image displays the status bar of the editors, where you can see the current cursor position along with the total number of lines and characters.<\/figcaption><\/figure>\n<\/figure>
    <\/div>

    Editor Save System<\/h2>

    Do you worry about losing your code? The HTML Editor uses a save system that keeps your work and enables you to keep coding. The editor saves every keystroke so if you close your browser tab by accident, your code stays safe and you can return to it.<\/p>

    <\/div>

    Automatic Code Save<\/h3>

    The editor saves each keystroke automatically. If you close the browser tab, the editor restores your code when you return. This removes the need to save by hand.<\/p>

    <\/div>

    Save Code to ToolKit<\/h3>

    You can save code to the ToolKit for later. You pick a group to store it, or it goes to “ungrouped” by default. You can rename, move, delete, or update saved code at any time. For example, if you do not choose a group, the code goes to “ungrouped”.<\/p>

    <\/div>

    Other Events Save Systems<\/h3>

    The editor also saves your cursor position so you return to the same spot. It remembers which tabs are open and your theme choice, dark or light. This helps you start where you left off.<\/p>

    <\/div>

    Devices Preview (65+)<\/h2>

    The HTML Editor’s Devices Preview feature lets you test your code’s responsiveness across over 65 device sizes, and you can add your own custom dimensions. You use it to check how your site adapts to different screens.<\/p>

    Default Breakpoints<\/h3>

    It includes five default breakpoints that give you a starting point for checking layout flexibility. These cover basic sizes and help you plan further changes.<\/p>

      \n
    • Default (100% x 100%)<\/li>\n
    • Wide Desktop (1440×900)<\/li>\n
    • HD Laptop (1366×768)<\/li>\n
    • Notebook (1280×800)<\/li>\n
    • Tablet\/Laptop Hybrid (1024×768)<\/li>\n<\/ul>
      <\/div>

      Mobile Breakpoints:<\/h3>

      For mobile, it offers 20 mobile breakpoints. You can see how your site adapts on small and large phones.<\/p>

        \n
      • iPhone SE \/ 5 (320×568)<\/li>\n
      • Galaxy S5 \/ S7 (360×640)<\/li>\n
      • Pixel 3 (360×690)<\/li>\n
      • Galaxy S8 (360×720)<\/li>\n
      • Galaxy S9 (360×740)<\/li>\n
      • Galaxy S20 (360×780)<\/li>\n
      • Galaxy S10 (360×800)<\/li>\n
      • iPhone 6 \/ 7 \/ 8 (375×667)<\/li>\n
      • Pixel 4 (375×724)<\/li>\n
      • iPhone X \/ XS \/ 11 Pro (375×812)<\/li>\n
      • Moto G7 (384×854)<\/li>\n
      • Pixel 5 (390×780)<\/li>\n
      • Galaxy S20 Ultra (390×844)<\/li>\n
      • Pixel 4 XL (393×851)<\/li>\n
      • Pixel 2 \/ 3 XL (411×731)<\/li>\n
      • OnePlus 7T (412×873)<\/li>\n
      • OnePlus 8 Pro (412×915)<\/li>\n
      • iPhone XR \/ 11 \/ 12 Mini (414×896)<\/li>\n
      • iPhone 12 Pro Max (428×926)<\/li>\n
      • Older Android (320×480)<\/li>\n<\/ul>
        <\/div>

        Tablet Breakpoints<\/h3>

        Tablets have 20 tablet breakpoints. You test your design across tablet screens to make sure layout and content remain usable.<\/p>

          \n
        • Kindle Fire (600×1024)<\/li>\n
        • iPad Mini \/ Air (768×1024)<\/li>\n
        • iPad Air (768×1004)<\/li>\n
        • Galaxy Tab S (800×1280)<\/li>\n
        • iPad Pro 10.5″ (834×1112)<\/li>\n
        • iPad Pro 11″ (834×1194)<\/li>\n
        • Pixel Slate (900×1440)<\/li>\n
        • Small Android Tablet (1024×600)<\/li>\n
        • Standard iPad (1024×768)<\/li>\n
        • iPad Pro 12.9″ (1024×1366)<\/li>\n
        • iPad Pro 11″ (landscape) (1112×834)<\/li>\n
        • iPad Mini Retina (1152×1536)<\/li>\n
        • iPad Pro 11″ (1194×834)<\/li>\n
        • Galaxy Tab A (1200×1920)<\/li>\n
        • Amazon Fire HD 10 (1280×800)<\/li>\n
        • Surface Go (1280×768)<\/li>\n
        • iPad Pro 12.9″ Retina (1536×2048)<\/li>\n
        • Older Windows Tablet (1366×1024)<\/li>\n
        • Samsung Galaxy Tab S7 (1152×1620)<\/li>\n
        • Surface Pro (1200×820)<\/li>\n<\/ul>
          <\/div>

          Laptops and desktops Breakpoints<\/h3>

          Laptops and desktops include 20 breakpoints as well. You check your pages from compact laptops to large monitors.<\/p>

          Additionally, you can add custom dimensions to test any screen size you need; for example, set a custom width and height to match a client device.<\/p>

            \n
          • Older Desktop \/ Laptop (1024×768)<\/li>\n
          • MacBook Air 13″ (1280×800)<\/li>\n
          • SXGA Desktop (1280×1024)<\/li>\n
          • Budget Laptop (1360×768)<\/li>\n
          • Standard Laptop (1366×768)<\/li>\n
          • MacBook Pro 15″ (1440×900)<\/li>\n
          • Business Laptop (1440×1024)<\/li>\n
          • Chromebook (1536×864)<\/li>\n
          • Laptop HD+ (1600×900)<\/li>\n
          • UXGA Desktop (1600×1200)<\/li>\n
          • Widescreen Desktop (1680×1050)<\/li>\n
          • Full HD Desktop \/ Laptop (1920×1080)<\/li>\n
          • WUXGA Monitor (1920×1200)<\/li>\n
          • ok Retina (2048×1152)<\/li>\n
          • MacBook Pro Retina 13″ (2304×1440)<\/li>\n
          • QHD Monitor (2560×1440)<\/li>\n
          • MacBook Pro Retina 15″ (2560×1600)<\/li>\n
          • MacBook Pro Retina 15″ (high res) (2880×1800)<\/li>\n
          • 4K UHD Monitor (3840×2160)<\/li>\n
          • Ultrawide Monitor (3440×1440)<\/li>\n<\/ul>
            <\/div>

            Information Panel<\/h2>

            New to the HTML Editor or want a quick guide? The Information Panel gives you the facts you need to use this tool.<\/p>

            The panel presents all must-know details in one place. You learn where to write code, how to run it, and how to view the result.<\/p>

            The panel gives tips on customizing your workspace and on moving or resizing panels. You can change settings to fit the way you work.<\/p>

            Also, the panel lists all essential commands and their uses. For example, press Ctrl+S<\/code> to save.<\/p>

            \n
            \"Info
            The image shows an info panel that contains a close button in the header and social icons labeled Follow us, along with instructions and command usage in the main body.<\/figcaption><\/figure>\n<\/div>
            <\/div>

            Manage Libraries<\/h2>

            Want to add libraries and web fonts to your project without manual coding? The Manage Libraries panel in the HTML Editor lets you add virtual libraries and web fonts with a click. It removes the need for manual code.<\/p>

            This panel provides one place where you add tools to your code. Also, you can activate or deactivate libraries and fonts with a click. If you want something specific, use the search bar to find libraries and fonts fast.<\/p>

            For example, add Bootstrap to use its grid and components.<\/p>

            \n
            \"Manage
            The panel shows a close button in the header and lists activated libraries in the main body, including CSS, JS, and font libraries.<\/figcaption><\/figure>\n<\/div>
            <\/div>

            Frontend UI Virtual Libraries (24+)<\/h3>

            This section lists over 24 frontend UI libraries, including Bootstrap and Tailwind. Click to add a library and it becomes part of your project.<\/p>

              \n
            • Font Awesome 6.7.2<\/li>\n
            • Bootstrap 5.3.7<\/li>\n
            • Bulma 0.9.5<\/li>\n
            • Tailwind 3.4.16<\/li>\n
            • Semantic 2.4.2<\/li>\n
            • Materialize 1.0.0<\/li>\n
            • Normalize 8.0.1<\/li>\n
            • jQuery 3.7.0<\/li>\n
            • Vue.js 3.3.4<\/li>\n
            • React JS 18.3.0<\/li>\n
            • React JSX 18.3.0<\/li>\n
            • Angular 1.8.3<\/li>\n
            • Preact 10.26.9<\/li>\n
            • SolidJS 1.9.7<\/li>\n
            • D3.js v7<\/li>\n
            • Chart.js 4.3.0<\/li>\n
            • Lodash 4.17.21<\/li>\n
            • Moment.js 2.29.4<\/li>\n
            • Axios 1.4.0<\/li>\n
            • GSAP 3.12.5<\/li>\n
            • Three.js 0.178.0<\/li>\n
            • Popper.js 2.11.8<\/li>\n
            • AOS (Animate On Scroll) 2.3.4<\/li>\n
            • Select2 4.1.0-rc.0<\/li>\n<\/ul>
              <\/div>

              Virtual Web Fonts (48+)<\/h3>

              Choose from over 48 web fonts. Activate a font with a click and your text uses it.<\/p>

                \n
              • Roboto<\/li>\n
              • Open Sans<\/li>\n
              • Lato<\/li>\n
              • Montserrat<\/li>\n
              • Source Sans Pro<\/li>\n
              • Poppins<\/li>\n
              • Raleway<\/li>\n
              • Oswald<\/li>\n
              • Merriweather<\/li>\n
              • PT Sans<\/li>\n
              • Nunito<\/li>\n
              • Ubuntu<\/li>\n
              • Playfair Display<\/li>\n
              • Noto Sans<\/li>\n
              • Josefin Sans<\/li>\n
              • Karla<\/li>\n
              • Mulish<\/li>\n
              • Quicksand<\/li>\n
              • Cabin<\/li>\n
              • DM Sans<\/li>\n
              • Work Sans<\/li>\n
              • Oxygen<\/li>\n
              • Exo 2<\/li>\n
              • Barlow<\/li>\n
              • Rubik<\/li>\n
              • Fira Sans<\/li>\n
              • Inter<\/li>\n
              • Alegreya<\/li>\n
              • Pacifico<\/li>\n
              • Lobster<\/li>\n
              • Great Vibes<\/li>\n
              • Dancing Script<\/li>\n
              • Satisfy<\/li>\n
              • Kaushan Script<\/li>\n
              • Poiret One<\/li>\n
              • Amatic SC<\/li>\n
              • Indie Flower<\/li>\n
              • Black Han Sans<\/li>\n
              • Comic Neue<\/li>\n
              • Fredoka One<\/li>\n
              • Allura<\/li>\n
              • Sacramento<\/li>\n
              • Cookie<\/li>\n
              • Cinzel Decorative<\/li>\n
              • Abril Fatface<\/li>\n
              • Bungee<\/li>\n
              • Righteous<\/li>\n
              • Cherry Swash<\/li>\n<\/ul>
                <\/div>

                ToolKit<\/h2>

                You use the ToolKit in the Editor to speed up your coding. It is full of tools and templates that help you save time and build projects faster. This section lets you store your own code so you can return to it anytime. You keep snippets like a recipe for quick use later.<\/p>

                \n
                \"ToolKit
                The ToolKit panel shows save and close options in the header, and the main body lists default templates for hero and intro sections.<\/figcaption><\/figure>\n<\/div>

                Moreover, the ToolKit has over 257 pre-built HTML, CSS, and JavaScript templates. These templates offer ready layouts and components that you can copy and change. For example, a button template helps you start a UI element in seconds.<\/p>

                From buttons to full layouts, the templates cover many needs. So instead of starting from scratch, you use the ToolKit to begin with a base.<\/p>

                <\/div>

                Hero & Intro Sections<\/h3>
                  \n
                • Template 1: Full Width Hero Section With CTA<\/li>\n
                • Template 2: Split Screen Intro<\/li>\n
                • Template 3: Video Background Hero Section<\/li>\n
                • Template 4: Slider Hero Section<\/li>\n
                • Template 5: Typing Effect Hero S<\/li>\n
                • Template 6: Particle Effect Hero Section<\/li>\n
                • Template 7: Animated Gradient Hero Section<\/li>\n
                • Template 8: Countdown Hero Section<\/li>\n
                • Template 9: Minimalist Hero Hero Section<\/li>\n
                • Template 10: Overlay Hero Section<\/li>\n<\/ul>
                  <\/div>