HTML Tag Formatter

A fast online tool for developers to format HTML tags, ensuring consistent indentation and readable markup for easier reviews and handoffs.

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1,336+
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 Tag 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
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About This Tool

This tool formats HTML tags by parsing input markup into a DOM-like representation and re-emitting it with a consistent, readable layout. It preserves the semantic content while correcting irregular spacing, inconsistent indentation, and mixed attribute styles to a uniform standard. Users supply raw HTML code and receive clean, properly indented markup suitable for reviews and handoffs.
Core behavior includes preserving DOCTYPE, comments, and void elements; attributes are normalized with consistent quoting and single-space separation; indentation is deterministic and can be configured. Options may include line-wrapping at a chosen width and a minified output mode for compact delivery.
The tool targets developers, QA engineers, CMS teams, and front-end specialists who maintain templates, components, and static pages. Its value lies in deterministic output, reduced review cycles, and easier collaboration across teammates, projects, and tooling. It is designed to be integration-friendly and compatible with common development workflows.
Key features include robust parsing, deterministic formatting across identical inputs, and safe handling of common edge cases such as nested fragments. Typical use cases include preparing HTML snippets for version control, chat-diffs, documentation, or deployment pipelines where consistent markup is important.

How to Use

Provide inputs: paste HTML into the input field.
Choose options: set indentation and wrapping width if available.
Run formatting: submit or trigger instant result.
Review outputs: inspect the formatted HTML in the output area.
Copy or export: copy to clipboard or paste into your editor or pipeline.

How to use online html tag formatter

Frequently Asked Questions

Find Quick Answers

What formats are supported?
The formatter accepts HTML5 documents and fragments, including nested elements, attributes, DOCTYPE, and comments. It preserves semantics while reformatting structure. It does not validate syntax or repair heavily malformed markup, but it provides readable, deterministic output.
How are attributes formatted?
Attributes are normalized with consistent quoting and spacing. Double quotes are used by default, with single spaces between attributes. Boolean attributes stay present. Reordering attributes is not performed unless an option to reorder is enabled.
Can I minify the output?
Yes. A minification option collapses whitespace and line breaks while preserving tag structure and content. The default is pretty-printed formatting suitable for review and collaboration.
Is integration possible in automated workflows?
The formatter can be invoked via API or command-line in automated pipelines. It outputs the formatted HTML for capture and reuse in CI/CD, editors, or documentation workflows.

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