Blumentals--Rapid CSS Editor

Lightweight, AI-enabled editor for front end development

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