How to open .DART files on Windows
To open .DART files on Windows, open the .dart file with a code editor (it is plain text).
Step-by-step instructions
- Open the .dart file with a code editor (it is plain text).
- If you have the Dart SDK installed, open a terminal in the file’s folder (or project folder) and run: dart analyze <your_file.dart> to check for issues.
Common issues
File opens in the wrong app (or as an unknown file type)
Some systems don’t automatically associate .dart with a code editor, so double-clicking may open the file in an unrelated program or prompt you to choose an app.
- Open the file from within your preferred code editor (use File → Open).
- Optionally set your OS file association so .dart defaults to that editor for future opens.
Analysis errors when running Dart tools
If the file contains syntax/type issues or depends on other files/packages in a project, Dart’s analyzer can report errors—especially when analyzing a single file outside its expected project context.
- If the .dart file belongs to a project, run analysis from the project root instead of only the single file (use dart analyze).
- Consult the analyzer output to locate the exact line/column reported and fix the indicated Dart syntax or type issue.
Text looks garbled due to encoding or line-ending differences
.dart files are plain text; if the file was created on a different system or saved with an unexpected encoding, it may display incorrectly in some editors.
- Reopen the file in an editor that lets you choose encoding and try UTF-8.
- Convert line endings (CRLF/LF) using your editor’s line-ending setting if formatting looks off.
Security note
.dart files are source code (plain text). Opening them in a text editor is generally low risk, but running or executing code derived from an untrusted .dart file can be unsafe because it may perform harmful actions when executed in an application context.