HTML Tools

Inar HTML Formatter

Inar HTML Formatter is a free online HTML Formatter that cleans, formats, and beautifies HTML code instantly. Improve code readability, organize indentation, and make HTML easier to edit, debug, and maintain—no installation required.

Inar HTML Formatter Online – Beautify, Clean & Format HTML | Inar Learn

Web Development Tools / HTML Tools / Inar HTML Formatter

Inar HTML Formatter

Format, beautify, clean, validate, and optimize your HTML code directly in your browser.

Format • Clean • Validate • Minify
Privacy-friendly tool: Your HTML code is processed locally in your browser and is not uploaded to a server.
Formats shortly after you stop typing. Off by default.
Duplicates are also reported, never silently guessed at.
HTML Input
Formatted HTML 
Your formatted HTML will appear here.
Options

Use the Options button in the toolbar above to expand full formatting and cleaning settings.

Diagnostics

Run Validate to see diagnostics here.

Lines: 0 Characters: 0 Elements: 0 Attributes: 0 Comments: 0 File size: 0 B

Validation & Diagnostics

  • Click Validate to analyze your HTML for common issues like unclosed tags, duplicate IDs, and missing DOCTYPE.

Keyboard Shortcuts

Format HTMLCtrl + Enter
Copy formatted HTMLCtrl + Shift + C
Minify HTMLCtrl + Shift + M
Validate HTMLCtrl + Shift + V
Close dialogEsc
How to Use Inar HTML Formatter
  1. Paste your HTML into the input panel, or upload an .html/.htm file.
  2. Open Options to choose indentation, quote style, and cleaning preferences.
  3. Click Format HTML to beautify your code.
  4. Review any issues in the Validation & Diagnostics panel.
  5. Copy or download the formatted result.

What is HTML formatting?

HTML formatting rewrites markup with consistent indentation, spacing, and line breaks so the structure of a page is easy to see at a glance. It changes how the code looks, not what it does — the same elements, attributes, and text remain in place.

Why format HTML?

Well-formatted HTML is faster to read, easier to debug, and simpler to hand off to teammates. Consistent structure makes nesting mistakes and missing tags obvious, and it keeps a codebase maintainable as it grows.

Frequently Asked Questions

An HTML Formatter is a tool that rewrites HTML markup with consistent indentation, spacing, and line breaks so it is easier to read, review, and maintain.
Paste or upload your HTML into the input panel, choose your formatting options, then select Format HTML to see the beautified result in the output panel.
Yes. The HTML Formatter from Inar Learn is free to use with no sign-up required.
No. All formatting, cleaning, validation, and minification happen locally in your browser. Your code is never sent to a server.
Yes. The formatter supports full documents including DOCTYPE, head, body, scripts, styles, and templates, as well as smaller HTML fragments.
Yes. Use the Minify button to compress your HTML by removing unnecessary whitespace while preserving meaningful text.
Yes. The Validate button checks for common issues such as unclosed tags, duplicate IDs, duplicate attributes, and missing DOCTYPE, and reports them by severity.
Yes. You can drag and drop an .html or .htm file onto the input panel, or use the file picker. Files are read locally and never uploaded.
You can choose 2 spaces, 4 spaces, or 1 tab for indentation.
Yes. The interface adapts to smaller screens with a tab-based layout for input, output, options, and diagnostics.