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HTML Prettier Online - Beautifier & Formatter

Format HTML code with prettier-style beautification online. Free HTML formatter with intelligent indentation, attribute sorting, validation, and minification — all in your browser.

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Auto-format

HTML Input

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Formatted HTML

Quick Examples & Options

Examples

Basic HTML Structure

<!DOCTYPE html> <html lang="en"> <head> <meta ch...

HTML with Form

<form action="/submit" method="post"> <div class="...

Minified HTML

<!DOCTYPE html><html><head><title>Example</title><...

HTML with Errors

<div class="container"> <p>Unclosed paragraph ...

Configuration Options

Mode

Format or compress

Indent

Indentation style

Preserve CommentsKeep HTML comments

Validate HTMLCheck for syntax errors

Advanced Options

Indent Type

Use spaces or tabs for indentation

Preserve Empty LinesKeep empty lines in the formatted output

Sort AttributesSort HTML attributes alphabetically

Remove Trailing SpacesRemove spaces at the end of lines

Self-Close TagsAdd trailing slash to self-closing tags (XHTML style)

How It Works

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Load Your Markup

Paste snippets, drag-and-drop HTML files, or use built-in examples. The editor supports long documents, inline scripts, and component templates without network calls.

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Choose Formatting Mode

Pick beautify or minify, adjust indentation (spaces/tabs), sort attributes, trim whitespace, and decide whether to preserve comments or empty lines.

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Validate & Inspect

Enable validation to flag unclosed tags, mismatched nesting, or invalid attributes with precise line and column details before shipping changes.

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Export Production Output

Copy results, download formatted files, or send minified HTML straight to your build pipeline. Tool history keeps earlier runs for quick comparisons.

Problems It Solves

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Problem

Large HTML templates written collaboratively often end up with inconsistent indentation and stray whitespace that makes reviews difficult.

Solution

Beautify mode normalizes spacing, applies consistent indentation, and sorts attributes so teams can focus on logic instead of formatting debates.

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Problem

Broken markup from missing closing tags or improper nesting ships to production when editors lack immediate validation feedback.

Solution

Real-time validation highlights structural issues with actionable error messages, preventing regressions before you commit or deploy.

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Problem

Manual minification is tedious and risky, yet production builds demand compact HTML to optimize performance metrics.

Solution

Minify mode strips redundant whitespace while respecting inline scripts/styles, giving you production-ready markup in one click.

Why Choose This Tool

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Browser-Only Processing

Sensitive landing pages, customer templates, or CMS exports never leave your machine. Everything runs client-side for privacy and compliance.

🎛️

Advanced Formatting Controls

Tweak indentation, line length, attribute order, comment handling, and self-closing tag behavior to match your team’s coding standards.

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Developer-Friendly UI

Auto-processing, diff-friendly output, keyboard shortcuts, and copy/download buttons speed up repetitive cleanup during refactors.

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Integrated Validation Insights

Highlight warnings and errors inline with codes and locations so QA teams can document issues or share fixes with designers and content authors.

Frequently Asked Questions

Is this an HTML Prettier alternative that works online?

Yes! This tool provides Prettier-style HTML formatting in your browser without installing Node.js or VS Code extensions. Perfect for quick HTML beautification online.

What's the difference between beautify and minify?

Beautify adds proper indentation, line breaks, and formatting for readability. Minify removes unnecessary whitespace and formatting to reduce file size.

Does this tool validate HTML syntax?

Yes, when validation is enabled, it checks for common HTML errors like unclosed tags, mismatched tags, and invalid attributes.

Can I customize the indentation style like Prettier?

Yes, you can choose between spaces or tabs, and set the number of spaces for indentation (2, 4, 8 spaces) just like Prettier configuration.

Are comments preserved during processing?

You can choose whether to preserve or remove HTML comments using the "Preserve Comments" option.

What about self-closing tags?

The tool can automatically format self-closing tags (like <img>, <br>) with or without the trailing slash based on your preference.

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📋

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✨

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