HTML Cheat Sheet & Reference

Resources

Online

Downloads

Basic Tags

Structure

<!DOCTYPE> — Defines the document type
<html> — Root element of the page
<head> — Metadata container
<body> — Visible content container
<title> — Page title

Text & Headings

<h1>–<h6> — Headings
<p> — Paragraph
<br /> — Line break
<hr /> — Horizontal rule

Links & Images

<a> — Anchor / hyperlink
<img /> — Image
<map> / <area /> — Image maps

Formatting

Text Formatting

<b> — Bold
<i> — Italic
<u> — Underline (deprecated)
<strong> — Strong emphasis
<em> — Emphasized text
<mark> — Highlighted text

Quotations & Code

<blockquote> — Long quotation
<q> — Short inline quote
<code> — Code snippet
<pre> — Preformatted text
<kbd> — Keyboard input
<samp> — Program output

Forms & Tables

Forms

<form> — Form container
<input /> — Input field
<textarea> — Multiline text
<button> — Button
<select> / <option> — Dropdown
<label> — Label for input

Tables

<table> — Table container
<tr> — Table row
<th> — Header cell
<td> — Data cell
<thead> / <tbody> / <tfoot>

Attributes

Core Attributes

class — CSS class name
id — Unique identifier
style — Inline CSS
title — Tooltip text

Language & Direction

lang — Language of content
dir — Text direction (ltr/rtl)
xml:lang — XML language

HTML Events

Mouse Events

onclick
ondblclick
onmousedown
onmousemove
onmouseout
onmouseover
onmouseup

Form Events

onfocus
onblur
onchange
oninput
onsubmit
onreset

Entities

Common Entities

& → &
< → <
> → >
  → non-breaking space
© → ©
® → ®
™ → ™
€ → €

HTTP Status Codes

1XX Informational

100 Continue
101 Switching Protocols

2XX Success

200 OK
201 Created
204 No Content

4XX Client Error

400 Bad Request
401 Unauthorized
404 Not Found

5XX Server Error

500 Internal Server Error
503 Service Unavailable
504 Gateway Timeout