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How do I use a code formatter to automatically format my HTML code?
How do I use a code formatter to automatically format my HTML code?
Jun 19, 2025 pm 09:05 PM
Use the code formatting tool to automatically format HTML code. First, select tools that support HTML such as Prettier, VS Code built-in formatter or HTML Tidy; then install and configure the tools, including creating configuration files and adding scripts; then automatically formatting through settings, such as formatting during saving, running command lines, or integrating Git hooks; finally pay attention to handling edge cases, such as mixed content, long line breaks and self-closing tag issues.
You can use a code formatter to automatically format your HTML code by choosing the right tool, configuring it properly, and integrating it into your workflow. These tools help clean up indentation, spacing, and tag structure so your code looks neat and is easier to maintain.
Choose a Code Formatter That Supports HTML
There are several code formatters that work well with HTML. Some popular ones include:
- Prettier – A widely-used formatter that supports HTML, JSX, and more.
- VS Code built-in formatter – If you're using Visual Studio Code, it has a basic HTML formatter built in.
- HTML Tidy – An older but still effective tool for cleaning up HTML files from the command line.
For most modern web development workflows, Prettier is a solid choice because of its flexibility and integration options.
Set Up and Configure the Formatter
Once you've chosen a tool like Prettier, here's how to get it set up:
- Install it – In your project folder, run
npm install --save-dev prettierif you're using npm. - Create a config file – Add a
.prettierrcfile to customize settings like tab width, quotes, and end-of-line style. - Add scripts (optional) – You can add a script in
package.jsonlike"format": "prettier --write .html"to easily format all HTML files.
If you're using VS Code, make sure to set Prettier as the default formatter by right-clicking an HTML file and selecting “Format Document With...".
Format Your HTML Automatically
To save time, you can set up automatic formatting:
- Format on save – In VS Code, enable this by going to Settings > "Format On Save" or by adding
"editor.formatOnSave": trueto your settings.json. - Run from the command line – Use
npx prettier --write .htmlto format all HTML files in your project directory. - Integrate with Git hooks – Tools like Husky and lint-staged can run Prettier before each commit.
This way, your HTML gets cleaned up every time you save a file or stage changes, keeping everything consistent without extra effort.
Watch Out for Edge Cases
Some things to be mindful of:
- Mixed content (like inline PHP or templating syntax) might not format correctly unless you configure the formatter to handle those cases.
- Long lines may wrap unexpectedly depending on your print width setting – adjust
printWidthin your config if needed. - Self-closing tags (like
<img alt="How do I use a code formatter to automatically format my HTML code?" >) might change to open-close format (<img alt="How do I use a code formatter to automatically format my HTML code?" >) based on the formatter's rules.
It's a good idea to review a few formatted files manually after setup to make sure nothing got rearranged in a confusing way.
Basically that's it.
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