.css file: how to open it on Windows
67 Windows apps register the .css extension. Install one of them to open the file with a double-click.
About the format
- Format
- CSS stylesheet
- Abbreviation
- CSS · Cascading Style Sheets
- MIME type
- text/css
- PRONOM identifier
- x-fmt/224
Format data: freedesktop.org shared-mime-info and PRONOM (The National Archives, UK).
-
RStudioRStudio is an integrated development environment (IDE) for R.
-
Notepad3Notepad like text editor based on the Scintilla source code.
-
Yandex BrowserYandex Browser delivers fast and secure browsing with built-in Alice and the ability to sync passwords, bookmarks, and bank cards across devices.
-
SpyderScientific Python Development Environment similar to matlab
-
KiroAn agentic IDE that helps you do your best work with features such as specs, steering, and hooks.
-
WindsurfThe most powerful AI IDE
-
VoidThe open source AI code editor.
-
Antigravity IDEExperience liftoffwith the next-generation IDE
-
Phoenix CodeThe text editor designed to make coding as simple and fun as playing a video game
-
PositronA next-generation data science IDE
-
AideThe open-source AI-native IDE
-
Ox editorThe simple but flexible text editor
-
TheiaIDEA modern and open IDE for cloud and desktop.
-
BracketsAn open source code editor for the web, written in JavaScript, HTML and CSS.
-
DatasetViewerA modern, high-performance dataset viewer built with Tauri, React, and TypeScript. Designed to handle massive datasets from multiple sources with efficient streaming for large files (100GB+) and lightning-fast search capabilities.
- Cursor
The AI Code Editor
- Comate
Intelligent coding capabilities throughout the entire development process along with enhanced multimodal abilities. Install now to start a seamless and natural intelligent development experience.
- WebStorm (EAP)
The smartest JavaScript IDE
- Trae CN
An adaptive AI IDE that transforms how you work, collaborating with you to run faster.
- Trae
An adaptive AI IDE that transforms how you work, collaborating with you to run faster.
- PhpStorm (EAP)
Lightning-smart PHP IDE
- PhpStorm
Lightning-smart PHP IDE
- WebStorm
The smartest JavaScript IDE
- 百度开发者工具
Baidu Smart Program development tool
- Devin
Manage fleets of local and cloud agents from one surface. Plan, delegate, review, and ship without leaving your editor.
- Cortex Code
Accelerate your data lifecycle with Cortex Code, a Snowflake-native AI coding agent. Simplify data engineering, ML, and agent-building with natural language.
- Sublime Text 4
Sublime is a sophisticated cross-platform text editor for code, markup and prose.
- CatPawAI
AI Programming Agent
- Altova MissionKit 2026 Enterprise Edition
Suite of XML, JSON, and SQL tools including XMLSpy & MapForce
- Altova MissionKit 2026 Professional Edition
Suite of XML, JSON, and SQL tools including XMLSpy & MapForce
- EditPlus
Text editor with FTP, FTPS and SFTP capabilities
- PSPad editor (x86)
The Developer’s Text Editor for Microsoft Windows
- Altova Authentic 2026 Enterprise Edition
XML content authoring tool and document editor for non-technical users
- Altova XMLSpy 2026 Enterprise Edition
JSON and XML Editor
- Altova XMLSpy 2026 Professional Edition
JSON and XML Editor
- PSPad editor (x64)
The Developer’s Text Editor for Microsoft Windows
- Lingma
Fully integrated with the AI coding assistant, enjoy efficient and intelligent programming with an out-of-the-box experience without installing any plugins.
- Sublime Text 4 (Dev)
Sublime is a sophisticated cross-platform text editor for code, markup and prose.
- Oxygen JSON Editor
The Perfect Tool to Simplify Your JSON Editing Experience
- Oxygen XML Author
Single-Source XML Authoring and Multi-Channel Publishing
- Oxygen XML Developer
All the Tools You Need for Designing XML Schemas and Transformation Pipelines.
- Oxygen XML Editor
The Premier All-In-One XML Editing Suite
- CodeBuddy
Tencent Cloud Code Assistant
- Altova Authentic 2025 Enterprise Edition
XML content authoring tool and document editor for non-technical users
- Altova MissionKit 2025 Enterprise Edition
Suite of XML, JSON, and SQL tools including XMLSpy & MapForce
- Altova MissionKit 2025 Professional Edition
Suite of XML, JSON, and SQL tools including XMLSpy & MapForce
- Altova XMLSpy 2025 Enterprise Edition
JSON and XML Editor
- Altova XMLSpy 2025 Professional Edition
JSON and XML Editor
- Qoder
Agentic Coding Platform for Real Software
- Qoder IDE
Agentic Coding Platform for Real Software
- Altova Authentic 2023 Enterprise Edition
XML content authoring tool and document editor for non-technical users
- Altova Authentic 2024 Enterprise Edition
XML content authoring tool and document editor for non-technical users
- Altova MissionKit 2023 Enterprise Edition
Suite of XML, JSON, and SQL tools including XMLSpy & MapForce
- Altova MissionKit 2023 Professional Edition
Suite of XML, JSON, and SQL tools including XMLSpy & MapForce
- Altova MissionKit 2024 Enterprise Edition
Suite of XML, JSON, and SQL tools including XMLSpy & MapForce
- Altova MissionKit 2024 Professional Edition
Suite of XML, JSON, and SQL tools including XMLSpy & MapForce
- Altova XMLSpy 2023 Enterprise Edition
JSON and XML Editor
- Altova XMLSpy 2023 Professional Edition
JSON and XML Editor
- Altova XMLSpy 2024 Enterprise Edition
JSON and XML Editor
- Altova XMLSpy 2024 Professional Edition
JSON and XML Editor
- EverEdit
Professional Text & Source Editor
- NoteTab Light
NoteTab is a replacement for notepad. It allows editing of a wide variety of file types.
- Haystack Editor
Navigate and refactor your code with ease
- Kate (AppX / Portable)
Advanced text editor.
- Text Editor Pro
Powerful text editing tool
- PearAI
The AI Code Editor for Your Next Project.
- CodeBuddy CN
Tencent Cloud Code Assistant CodeBuddy, an AI-powered coding IDE.
Related guide: Change the default app for a file type in Windows