HTML/JS/CSS Code Filter

HTML/JS/CSS Code Filter: Core Features and Principles

In web development or content cleaning, we often encounter code mixed with HTML tags, inline JavaScript, and CSS styles. This not only affects readability but can also introduce security risks (such as XSS). This tool allows you to filter out HTML tags, JavaScript, or CSS on demand, outputting pure text or specific retained code. It helps you quickly sanitize content, extract key information, or prepare compliant data.

Why Choose Our HTML/JS/CSS Code Filter?

• Multi-dimensional filtering: Individually remove HTML tags, JavaScript scripts, or CSS styles, and flexibly combine them for your desired output.
• Instant preview and simple operation: Paste your code and check the options. Results are displayed in real-time with no server interaction required, ensuring your privacy.
• Safe and reliable processing: Uses a combination of regular expressions and DOM parsing to accurately identify and strip code blocks, effectively preventing accidental deletions.

Tool Tutorial

1. Paste the code you want to process into the input box.
2. Check the content you want to filter: Remove HTML tags (keep plain text), Remove JavaScript (including inline events and script blocks), Remove CSS (including style tags and inline styles). Unchecked items will not be processed.
3. The system instantly generates the filtered results, which you can copy and use directly.

Example input:

<div style="color:red;" onclick="alert('hi')">Hello <b>World</b></div><script>evil()</script>

Output when "Remove JavaScript" and "Remove CSS" are checked:

<div>Hello <b>World</b></div>

Output when "Remove HTML tags" is checked:

Hello World

Frequently Asked Questions (FAQ)

• Will filtering modify the original input?
  No, all operations are based solely on front-end parsing and do not modify the original input. You can adjust the options at any time to see different results.
• Does it support filtering large amounts of code? How is the performance?
  The tool uses efficient regular expressions and DOM parsing, allowing it to filter common web page snippets (hundreds of lines) instantly. For extremely large files, we recommend processing them in batches to prevent browser lag.

Important Notes

If the input code contains improperly closed tags or obfuscated scripts, the filtering may not be exhaustive; we recommend using standard HTML snippets. This tool runs entirely on the client side, and your code will never be uploaded to a server, so you can use it with peace of mind. For content with a large number of inline events or complex CSS expressions, we recommend checking both "Remove JavaScript" and "Remove CSS" to ensure complete removal. If you only need plain text, please check all three options.

Technical Notes & Usage Suggestions

In daily development, filtering HTML/JS/CSS is commonly used for preprocessing before implementing Content Security Policy (CSP), converting email HTML to plain text, and cleaning SEO crawler data. For example, you can strip dangerous tags and event attributes from rich text editor outputs, retaining only safe whitelisted tags. By combining options, you can quickly obtain clean code that meets your specific requirements.