What is a DONE file?
A .DONE file is a marker file. Software uses it to signal that a specific process is complete. These files are often empty or contain very little text. Scripts, file transfer tools, and background processes create them. For example, WinZip uses a .DONE file to show that a downloaded file is completely processed. When a program sees a .DONE file, it knows the main data file is safe to use.
How to open DONE files?
You do not usually need to open a .DONE file. If the file contains plain text, you can view it with Notepad on Windows or TextEdit on macOS. Developers can read the contents using command-line tools like `cat` or `nano` on Linux.
Best practices and troubleshooting
A .DONE file often appears next to a larger data file. Do not delete it until you are sure the related software is finished using the main file. If a file transfer fails, the system might not create the .DONE file. If you do not know what created the file, inspect the folder name or check the file structure to find clues.
Software and tools
Many different systems create .DONE files. You will see them in FTP clients, automated data pipelines, and download managers. Because .DONE has multiple possible meanings depending on the system, we recommend viewer.online/done to identify the actual format of your file.
Summary
viewer.online/done can analyze .DONE files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available. Using viewer.online/done is useful for identifying, inspecting, and understanding .DONE files without installing software or dealing with compatibility problems.