HTML Formatter

Formats HTML code for readability and consistency, helping developers and content teams prepare clean markup for publishing and QA.

Tool coming soon!

We're working hard to get this tool ready for you.

Request Feature / Support
932+
Total Calculations Run
< 15ms
Browser Execution Speed
100%
Client-Side Privacy
4.9 / 5.0
User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how HTML Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}
Computed Result { "id": 1, "status": "active", "roles": [ "admin" ] }
Execution Mode Client-Side In-Browser JS
AI Web Tool Generator

Build Your Own Custom Web Calculator in Seconds

Type what tool or calculator you need below. Our AI will build it instantly for your site.

Popular ideas:
100% FREE • No Credit Card Required

About This Tool

The HTML Formatter processes input HTML to produce a consistently readable, well-indented version of the code. It operates without evaluating scripts, preserving semantic structure while making markup easy to scan. The tool is valuable for developers preparing code for reviews, editors preparing tutorials, and SEO teams validating markup for crawlers. By standardizing indentation and line breaks, it reduces the cognitive load during code reviews and publication workflows.
Conceptually, the formatter builds a hierarchical representation of the document and then serializes it with configurable spacing, preserving comments and Doctype declarations. Advanced options may include sorting attributes or preserving preformatted blocks so that user-intended spacing within pre tags remains intact. The unique value lies in providing a deterministic, repeatable output that aligns with team conventions, improving collaboration and reducing back-and-forth edits during QA and publishing.
Use cases include preparing HTML snippets for documentation, cleaning up CMS exports, and validating code quality for SEO audits. The tool is beneficial to developers, content engineers, and QA analysts who need predictable, clean markup without manual reformatting. Its core features focus on parse-and-serialize formatting, whitespace management, and optional attribute handling to support diverse coding standards.

How to Use

  1. Provide HTML input
  2. Choose indentation (2 or 4 spaces) and optional options
  3. Run formatter (instant result)
  4. Review formatted output
  5. Copy or export for publication
How to use html formatter w3schools

Frequently Asked Questions

Find Quick Answers

What input does the tool accept?
The tool accepts standard HTML snippets and fragments, including common block and inline elements, comments, and doctype. It applies formatting without executing scripts.
How are attributes ordered?
If enabled, attributes can be sorted alphabetically; otherwise the original attribute order is preserved to maintain intended semantics.
Are scripts and styles preserved?
Yes. Content within script and style blocks is preserved as-is, while formatting applies to the surrounding markup and structural elements.
Does formatting minify HTML?
No. The formatter outputs consistently indented, readable HTML. It does not remove whitespace inside preformatted blocks unless requested by options.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

Register Free Account

Related Tools

Other useful calculators and utilities you might like

Web & SEO Tools

Spotify to MP3 Converter

Convert Spotify tracks and playlists to MP3 format instantly with our free online converter.

Web & SEO Tools

Road Distance Calculator

Calculate the driving distance and travel time between two addresses with our free online road dista...

Web & SEO Tools

Age Calculator

Calculate your exact age in years, months, and days from any birth date to any target date.

Web & SEO Tools

Currency Converter

Convert currencies instantly with real-time exchange rates and historical data support.

Your Feedback Matters

Help Us to Improve