HTML Formatter
Format and beautify indented HTML: normalize whitespace, stack attributes, and make nested tags readable. Handles void elements and inline text sensibly so output stays valid.
Runs 100% in your browserNo signup neededFree forever
Paste HTML and the formatter rewrites it with consistent two-space indentation, one attribute per line for wide tags, and no whitespace churn inside inline text nodes.
HTML input
Formatted
!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"><title>Demo</title>
</head>
<body>
<main>
<h1>
Hello
</h1>
<p>
This is a<strong>bold</strong>paragraph<br>with a line break.
</p>
<ul>
<li>
One
</li>
<li>
Two
</li>
</ul>
<!-- a comment -->
RAW0
</main>
</body>
</html>319 bytes → 417 bytes · grew 98 bytes · formatting happens locally
Frequently asked questions
Will the formatter break my existing markup?
It only adds whitespace around structural elements and never rewrites attributes or text content, so the meaning of the markup is preserved.
Does it handle inline elements?
Yes — spans, links and emphasis stay on one line with their neighbours to avoid creating phantom whitespace in rendered output.
More tools
JSON Formatter & ValidatorBeautify, minify, validate and explore JSON with a tree view.Base64 Encoder / DecoderEncode and decode Base64 text with full UTF-8 support.Hash GeneratorGenerate MD5, SHA-1, SHA-256 and SHA-512 hashes instantly.Text Diff CheckerCompare two texts side by side with live highlighting.Regex TesterLive pattern matching with highlighted matches and groups.UUID GeneratorBulk generate RFC 4122 UUIDs (v4 & v7) in one click.URL Encoder / DecoderEncode and decode URLs and query parameters cleanly.CSV ⇄ JSONConvert CSV tables to JSON and back, with live preview.JWT DecoderDecode JWTs into header, payload and signature views.Timestamp ConverterConvert Unix timestamps, ISO dates and human dates both ways.Hex ViewerInspect text bytes as an offset, hex, ASCII classic hexdump.Case ConverterConvert text between camelCase, snake_case, kebab-case and more.URL Slug GeneratorTurn any title or phrase into a clean, SEO-friendly URL slug.Lorem Ipsum GeneratorGenerate placeholder text: words, sentences or paragraphs.Password GeneratorGenerate strong random passwords with an entropy estimate.Text StatisticsCount words, characters, lines, sentences and reading time.HTML Entities Encoder / DecoderEncode or decode HTML entities (&, <, &) safely.Color Converter & Contrast CheckerConvert HEX, RGB, HSL and HSV with WCAG contrast ratios.CSS Unit ConverterConvert px ⇄ rem ⇄ em with a configurable root font size.CSS MinifierMinify CSS: strip comments, whitespace and shorten colors.YAML ⇄ JSONConvert between YAML and JSON with strict validation.SQL FormatterBeautify SQL with configurable indentation and keywords.CSV → SQL GeneratorTurn CSV data into CREATE TABLE and INSERT statements.HMAC GeneratorCompute HMAC-MD5, HMAC-SHA1, HMAC-SHA256, HMAC-SHA512.Cron Expression ParserExplain cron schedules like '*/5 * * * *' in plain English.IPv4 Subnet CalculatorCalculate networks, broadcast addresses and host counts for CIDR.