Free HTML Formatter & Beautifier - Fast Browser Tool

Format, beautify, inspect, and minify HTML directly in your browser. Apply consistent indentation, review structural diagnostics, and download clean output without executing or uploading your code.

Format HTML How it works
No HTML uploads No script execution Raw-text preservation Mobile friendly

HTML Formatter

Paste HTML on the left, choose your formatting options, and generate readable or minified output. Your markup is treated as text and never inserted into this page.

Local text processing
Maximum input size: 1,000,000 characters
IN HTML input
0 characters
Ctrl/⌘ + Enter to format 0 lines
OUT Formatted output
0 characters
Waiting for input 0 lines

Document statistics

No data
Elements 0
Text blocks 0
Comments 0
Maximum depth 0
Input size 0 B
Output change -

Structural diagnostics

Not inspected
  • Format or inspect HTML to review structural issues.
01
Private by design HTML stays inside your browser
02
Non-executing Input is handled only as text
03
Raw-text aware Preserves sensitive content blocks
04
Export ready Copy or download clean HTML
Readable web development

Beautify HTML without executing your markup

This HTML Formatter transforms compressed or inconsistently indented markup into a cleaner structure. It separates block elements, applies consistent indentation, and preserves inline content sequences where practical.

The formatter uses a quote-aware scanner rather than inserting your HTML into the current document. Tags containing > inside quoted attributes are handled safely, and entered scripts are never executed.

Contents of script, style, pre, and textarea elements are treated as raw text. This prevents JavaScript, CSS, preformatted content, and textarea defaults from being interpreted as nested HTML tags.

Formatting is not complete standards validation

Structural diagnostics can identify common mismatched, unexpected, and unclosed tags. They do not check every HTML content model, accessibility rule, obsolete attribute, ARIA requirement, or browser parsing behavior.

Developer-focused features

Everything needed to clean HTML quickly

Format, inspect, minify, compare, copy, and export markup through one responsive browser-based workspace.

01

Consistent indentation

Choose two spaces, four spaces, or tabs to match your preferred coding convention.

02

Conservative minification

Reduce ordinary spacing while keeping raw-text element contents unchanged.

03

Structural diagnostics

Review unexpected closing tags, mismatched nesting, unclosed tags, and tokenization errors.

04

Raw-text preservation

Protect script, style, pre, and textarea contents from normal HTML token formatting.

05

Live document statistics

Measure elements, text blocks, comments, nesting depth, bytes, and output size changes.

06

Copy and download

Copy formatted markup, reuse output as input, print it, or download a clean HTML file.

Three simple steps

How to format HTML online

No installation, account, code upload, or rendering step is required.

1
Step 1

Paste your HTML

Add minified, compact, or inconsistently indented markup to the input editor.

2
Step 2

Choose an operation

Beautify with your preferred indentation, minify the source, or inspect its structure.

3
Step 3

Review and export

Check diagnostics and statistics, then copy or download the resulting HTML.

Processing reference

How different HTML content is handled

The formatter applies different rules to structural, inline, void, and raw-text content.

Content
Handling
Examples
Block elements
Placed on indented structural lines
div, section, article, p, table, form
Inline elements
Kept with nearby text where practical
span, strong, em, a, code, label
Void elements
Never added to the open-tag stack
img, input, meta, link, br, source
Raw-text blocks
Inner content is preserved
script, style, pre, textarea
Comments
Preserved or removed by option
<!-- developer note -->
Practical guidance

HTML formatting best practices

Use formatting as part of a broader workflow that includes standards validation, testing, accessibility, and version control.

1

Keep a source-controlled copy

Commit or back up the original before applying large formatting changes to production markup.

2

Review whitespace-sensitive layouts

Test inline content, preformatted text, CSS white-space modes, and email HTML after formatting.

3

Use a standards validator

Run final documents through a complete HTML conformance checker for deeper validation.

4

Test templates after formatting

Django, Jinja, Vue, JSX, and other template languages may have syntax this HTML-only tool does not understand.

5

Minify only build output

Keep readable source during development and minify generated deployment assets when practical.

6

Check accessibility separately

Clean indentation does not verify headings, labels, alternative text, landmarks, focus, or ARIA usage.

Common questions

HTML formatter FAQ

What does the HTML formatter do?

The HTML formatter separates structural elements onto readable lines, applies consistent indentation, preserves inline sequences where practical, and reports common mismatched or unclosed tag problems.

Is my HTML uploaded or executed?

No. The HTML is processed locally as text inside your browser. This template does not upload it, inject it into the live page, execute scripts, or save it in local storage.

Does the formatter preserve script and style content?

Yes. Script, style, pre, and textarea blocks are treated as raw-text regions. Their inner content is preserved rather than being parsed as ordinary HTML markup.

Can this tool validate HTML completely?

No. It provides useful structural diagnostics for mismatched, unexpected, and unclosed tags, but it is not a complete standards conformance checker and does not replace an official HTML validator.

What is the difference between formatting and minifying HTML?

Formatting adds indentation and line breaks for readability. Minifying removes unnecessary spacing and can remove comments to reduce source size. Minification should be reviewed when CSS or templates depend on exact whitespace.

Does HTML formatting change how a page looks?

Usually standard HTML whitespace collapses in the browser, but whitespace can be significant in preformatted content, inline layouts, CSS white-space modes, and template systems. Always review and test formatted output before production use.

Can I format Django, Jinja, or other template syntax?

Template expressions inside ordinary text are generally preserved, but this formatter is designed for HTML and does not fully parse Django, Jinja, Vue, JSX, or other framework-specific grammars. Review template output carefully.

Continue developing

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Ready to clean your HTML?

Beautify, inspect, minify, copy, and download markup privately without executing the entered document or sending it to a server.

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