screenshotCode Beautifier (JS, CSS, HTML)  |  Download A lite and free JavasScript, CSS and HTML beautifier for your browser.

Some of the important features of the Code Beautifier (JS, CSS, HTML) addon are listed below. This is followed by an overview of this addon. This summary contains few words about the addon, its function, and its features. Next is FAQ, this section is useful to get information about how this addon works in your browser. If you couldn't find a specific answer, please fill the bug report form on this page or the contact form on the homepage to let us know about your question. Following the FAQ, is the bug report form. It is designed to collect user feedbacks and bugs about this addon. Users can suggest improvements or feature requests through this form too. The next section is for submitting comments about this addon which uses the Facebook comments plugin. The last section is dedicated to reports submitted through the GitHub website. We hope the information provided on this page, could help you get all the basics you need about this addon and enable you to have a better experience with Code Beautifier (JS, CSS, HTML).

In short, Code Beautifier (JS, CSS, HTML) is a lite addon that let you easily beautify JS, CSS, and HTML codes in your browser without the need to have an internet connection. Please check the YouTube tutorial below to get an idea of how this addon works in your browser. If you want to contribute to the developement of this addon, please fork it on GitHub, and push your changes to a named branch. Moreover, you can review all the comments made on GitHub commits.

4 Reasons to Use Code Beautifier (JS, CSS, HTML)

  • Has a standalone popup window with no background activities when the UI is closed.

  • Purely based on web technologies and can beautify javascript, CSS and HTML.

  • Has plenty of options to adjust via the interface.

  • Available for Firefox, Chrome, Edge and Opera browsers on all operating systems.

YouTube Tutorial

This video gives you an idea of how the extension works in your browser.

Matched Content


  • Code beautifier is a tool that takes ugly, hard-to-read code and formats it in a way that is more easily readable by humans. This is achieved by adding indentations, whitespace, and newlines to make the code more organized and easier to understand. Some code beautifiers can also perform other operations like renaming variables and functions to make them more descriptive, and rearranging code to improve its structure.

    In addition to making code more readable, using a code beautifier can also help to ensure that your code follows a consistent style guide. This can make the code easier to understand for other developers and make it more convenient to work with. Code beautifiers can be used for a wide range of programming languages, and are often integrated into code editors and IDEs so that you can easily run them on your code as you're writing it. Some popular general code beautifiers include AStyle, ClangFormat, and Uncrustify. While code beautifiers can be a useful tool for improving the readability of your code, it's important to note that they are not a substitute for good coding practices. You should still strive to write clean, well-organized code from the beginning, rather than relying on a code beautifier to fix it for you later. Additionally, it's a good idea to run your code through a linter, which is a tool that checks your code for potential errors and other issues, before using a code beautifier. This can help to ensure that your code is not only easy to read, but also functional and free of bugs. One potential drawback of using a code beautifier is that it can sometimes change the way your code is organized, which can make it difficult to understand the logic behind it. For this reason, it is better to carefully review the changes made by the code beautifier "before" you save them. If you are not happy with the changes, you can always undo them or modify them manually to suit your needs. Additionally, some code beautifiers allow you to customize their settings to control how your code is formatted, and help you minimize the potential for confusion. In general, code beautifiers are used during the development process, rather than in the production environment. This is because the changes made by a code beautifier can sometimes affect the performance of your code, and using a code beautifier on production could potentially introduce bugs or other issues. Furthermore, a code that is formatted by a code beautifier may become less efficient than the original code, since beautifiers often add extra whitespace and other formatting characters that take up space but don't affect the functionality of the code. For these reasons, as mentioned above, it is recommended to use a code beautifier only during the development process and avoid using it on the production code.

    In summary, a code beautifier is a tool that formats the code to make it more readable and consistent with a style guide. While code beautifiers are useful for improving the readability of your code, they should not be used as a substitute for good coding practices, and also they should not be used in the production stage. Instead, code beautifiers are typically used during the development process, to help make your code more organized and easier to understand. Using a code beautifier helps to ensure your code is easy to read and maintain, which in turn, makes it easy for other developers to collaborate. To beautify JavaScript, CSS, and HTML codes within your browser, you can use the Code Beautifier extension. Please read the below FAQ items to get more information about this add-on.

Frequently Asked Questions

  • 1. What is Code Beautifier?

    Code Beautifier, is a lite and multi-browser addon that lets you easily beautify codes in your browser. This addon supports javascript, CSS, and HTML as input languages. You can either browser files via the (+) button at the UI (top-left corner) or drag and drop a file in the textarea (left side). The former method is preferred as the coding language for the input file can be detected automatically and the interface will be updated accordingly (no need to adjust the input language manually). This code beautifier addon can work offline without the need for an internet connection. It uses an opensource library - js-beautify - available in this GitHub repo. Moreover it also uses the famous CodeMirror library to format the input and output codes. Within the UI there are several buttons at the top toolbar which are self-explanatory. There is also a settings list at the top which contains several options for the beautifier. Change any desired settings and see the live result in the output field. To download the beautified result, please click on the download button at the top toolbar.

  • 2. How can I work with this addon?

    As mentioned above, please open a file via the file selector UI by clicking on the (+) button. Once the file is loaded, please adjust the input language. If you open the file via the file selector, the addon automatically detects the input language. But, in case it was not able to detect the language, please adjust it manually. Currently, there are three languages to choose from. Once the correct language is set, please click on the beautify button at the top toolbar. You will see the beautified result on the right textarea. The left textarea is for the input file and the right textarea is for the output result. Please click on the download button to save the result to your machine. As mentioned above, this addon does not need an internet connection, and once the UI is closed, there will not be any background activities at all.

  • 3. How can I download the source code for Code Beautifier (JS, CSS, HTML)?

    To download the source code for this extension from Chrome Web Store, it is recommended to use Extension Source Downloader. With this addon, you can download the source code as a ZIP or CRX format to your machine. If you want to download the source code from the Firefox addons store, please open the firefox download link (if available) in the Firefox browser and then right-click on the - Add to Firefox - button and select - Save Link As... - item. Choose the destination folder on your machine and then save the file in XPI format. You can then rename the XPI format to a RAR or ZIP file. Some extensions may have a GitHub repo address, which you can use to download the source code as well. But, it may not be the latest version of the addon. Therefore, downloading the source code from the official web stores is the best option as it always gives you the latest version of the addon.

  • 4. How does this addon work?

    This addon works based on two open-source javascript libraries. For the beautify function, it uses the - js-beautify - library available in this GitHub repo. It is a lite and fast library to beautify javascript, CSS, and HTML codes. For rendering input and output codes, this addon uses the famous CodeMirror library. All the libraries are purely based on web technologies and work offline on your machine.

  • 5. Does this addon has a separate options or settings page?

    No, as mentioned above, this addon does not have separate options or settings page. All the settings are available within the app interface.

  • 6. Is this addon available for mobile browsers?

    Yes, this addon is available for both mobile and desktop machines on all operating systems.

  • 7. How can I disable this addon?

    If you want to permanently disable the addon, please head to the extensions tab in your browser and then click on the disable button.

  • 8. How can I change the download location for the resulting file?

    The location that the final file is downloaded, is the default download location in your browser. To change this location, please head to the settings tab in your browser and then change the default download location from there.

  • 9. Where can I find the privacy policy for Code Beautifier (JS, CSS, HTML)?

    Please read the privacy policy for this extension here.


Reporting Bugs

Your feedback goes a long way towards making this addon even better. With this feedback and bug report form, you can report bugs or suggest features/enhancements for the functionality or performance of this addon. Please note that this form will be sent to the developer(s) of this addon. You will not get an immediate or personal response at the moment. However, the developer(s) may contact you through the email address provided in this form for further clarifications or to request additional information regarding the reported bug(s).

If you want to rate or write a review for this addon in the official webstore, please press the - Rate this addon - button below.

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Please be as specific as possible. Basically, describe what happened, what you were doing when it happened, and why you think it is a problem.

Describe the step-by-step process required to reproduce the issue you are reporting. Be specific when describing these steps by providing as much detail as possible.

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Reviews | Discussions

Please note: keep these reviews/discussions clean, and avoid the usage of derogatory or inappropriate language or terminology in references to individuals or groups based on race, national or ethnic origin, color, religion, age, gender, etc. Do not submit bugs in your reviews, use the above bug-report section instead. Also, never post any personal information in these reviews.

GitHub Issues | Fork me on GitHub