Rapid CSS editor is an HTML and CSS code editor designed to make you more productive. With Rapid CSS you can create modern HTML and CSS-based websites and user interfaces faster and easier. Coding is a breeze thanks to many intelligent features such as auto complete, code inspector, CSS checker, integration with AI assistant and instant built-in multi-browser preview. What's new in 2025?

Quick and lightweight
Loads much faster than any other CSS editor or IDE with similar features
Powerful syntax highlighting Updated!
Supports HTML, CSS, LESS, SASS, JavaScript, PHP, XML, ASP, Perl and more
Code intelligence Updated!
Tons of intelligent HTML and CSS code completion, navigation and suggestion features
Smart code re-use
Code snippet library and code templates with assignable shortcuts

Built-in AI assistant New!
Generate, modify and optimize code automatically, solve coding challenges *
Browser preview Updated!
Built-in multi-browser preview, split-screen mode, screen-size testing, XRay
HTML5 and CSS3 ready Updated!
Coding features are up-to-date with modern standards
Mobile web development
Media queries, viewport assistant, screen-size preview
Integrated validation
Spell checker, CSS checker, W3 HTML and CSS validator

Powerful CSS tools Updated!
Compatibility watch, prefixer, shadow assistant, box assistant, web font assistant and much more
Direct FTP/SFTP/FTPS Updated!
Edit directly on your web server or publish local development copy updates with a single click
Powerful color picker
Advanced color picker with project color management
Advanced search and replace
Goto anything, quick search, detailed search, file search, regular expressions, detailed results and more

Why Rapid CSS?

Save time & boost productivity
Rapid CSS combines speed of a simple text editor with the power of a full-size development suites allowing you to work faster and smarter.
Stay 100% modern
Be up to date with the latest HTML5 and CSS3 specs and development trends. Easily create fluid CSS layouts and mobile websites.
Get the best package
Just check the feature list and screenshots for what you get and then try it out. You will be surprised!
Unbeatable value
Rapid CSS editor offers you the best features-to-price ratio. Guaranteed!

How is Rapid CSS better?

Faster startup
Unlike with other HTML and CSS editors, Rapid CSS loads instantly.
Attention to detail
Rapid CSS code editor features are carefully crafted with speed and productivity in mind.
No clutter
Rapid CSS editor is quick, clean and lightweight. It very powerful, yet not stuffed with useless buttons or panels.
Superb FTP/SFTP/FTPS features
Upload/update your online website files in a just few clicks.
A lot of integrated tools
Syntax checkers, validators, debuggers, beautifiers, built-in CSS prefixer etc.

Beginner friendly CSS editor

Rapid CSS is a perfect HTML and CSS editor for learners. Thanks to its unique combination of simplicity and powerful features, Rapid CSS editor is used by many schools, universities and web development courses.

Choice for experts

Rapid CSS is the obvious style sheet editor choice for expert web designers, because it packs unique punch of features, speed, flexibility and value in a single HTML5 and CSS3 editor. You may also want to look into our more advanced editors.

Powerful AI features *

AI-powered assistant can help you generate, modify and optimize code automatically, as well as find answers and solve coding challenges right within the comfort of your code editor.

Detailed feature list

Text editor

Syntax highlighting
HTML, CSS, JavaScript, PHP, ASP, XML, WML, Perl, SASS, LESS
Advanced text editor
Line numbering, gutter, margin, word wrap, block select and more
Unicode support
UTF-8, UTF-8 without BOM, UTF-16
Code minimap
Code folding
Line highlighting
Split editing
Macro recorder

Search & navigate

Go to anything
Instantly jump to any file, symbol, word or line
Multi-highlighting
All instances of the selected text are highlighted
Search and replace
Quick search, detailed search, regular expressions, detailed results and more
Search and replace in files
Superb navigation
Advanced bookmarks and quick jumps between recent places
Bracket highlighting
HTML tag highlighting
Easily detect matching and missing tags

Keystroke savers

Auto brackets
Auto quotes
Smart Copy and Cut
If nothing is selected, word at cursor is cut/copied (usual shortcuts)
Smart Paste
If nothing is selected, word at cursor is replaced (default shortcut Shift+Ctrl+V)
Emmet plugin

AI-powered assistance *

Integrated AI-Chat / AI assistant
ChatGPT 3.5, ChatGPT 4
Automatically write, modify, validate code
AI-prompt history & library
Quick, one-click commands
Check, Explain, Simplify, Add Comments

Language tools

Code intelligence
HTML and CSS
Code explorer/navigator
HTML and CSS
Integration with online reference
HTML and CSS

CSS and HTML

HTML and CSS inspector
HTML assistants
HTML tag auto-close
CSS assistants
box editor, gradient editor, shadow editor
Inline color preview in CSS
Support for mobile development
viewport assistant, CSS media queries
Support for Google fonts
HTML and CSS code beautifier
CSS prefixizer
CSS minifier
SASS and LESS support
Integration with W3 validators
HTML and CSS
Integration with CSS HTML Validator
Integration with HTML Tidy for HTML5
Framework support
Bootstrap 3, Bootstrap 4, Bootstrap 5

File management

Built-in file explorer
Edit/save directly on FTP/SFTP/FTPS server or quickly publish all changed files
Built-in FTP/SFTP/FTPS browser
Project management
Maintain separate projects, search within project, publish changes with a single click
SVN and Git integration
with TortoiseSVN and TortoiseGit
One-click HTML publishing
Publish HTML file and all linked files (images, css, js) get uploaded too

Preview

Built-in preview
Chrome and IE rendering, split-screen mode, screen-size testing
XRay for HTML/CSS
One-click preview in web browser
Preview via web server
external or built-in

User interface

Flexible tab-based interface
Draggable and dockable tabs, multi-monitor support
Quick interface switching
Hide/show all side panels with a single key
Detailed customization
Workspace layout, keyboard shortcuts, text editor behavior, toolbars and menus etc.

Plugin support

Add your own features by writing plugins
plugins can be written in JScript and can utilize powerful Chromium engine
Plugin catalog

Other

HTML color picker
Pick-from-screen feature, file colors, project colors, color palettes, lightness adjustment, rgb/rgba/hsl/hsla support
Inline ToDo
with TODO, FIXME and CHANGED markers
Multi-item clipboard
Code snippet library
Code templates, assignable shortcuts
Easy settings import/export
Crash recovery system
Diff tool integration

Quick Navigation;