Click the "Select File" button above, and choose your F11 file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert F11 to another file type
To convert your F11 file to another format, you need ROS Offline Application or other Data software.
Convert a file to F11
To convert other file formats to the "Tax Return Data" file type, you need software like ROS Offline Application or a similar tool.
About F11 files
The .f11 file extension is primarily associated with the Irish Revenue Commissioners (Revenue.ie) as a digital container for the Form 11 Income Tax Return. These files are generated and used by the ROS Offline Application (Revenue Online Service) to allow taxpayers and accountants to prepare self-assessment returns offline before uploading them. Technically, an .f11 file is a standard XML (Extensible Markup Language) text file renamed to identify the specific tax year and form type.
The main challenge users face is that .f11 files are not designed to be human-readable outside of the ROS environment. You cannot simply double-click them to see a filled-out tax form; instead, you will see lines of raw code if opened in a text editor like Notepad. Users frequently need to convert these files to PDF for printing and archiving, or to Excel (XLSX) to analyze the financial data without navigating the slow, Java-based ROS interface.
Note: In hardware contexts, an .f11 file may also be a BIOS update file for Gigabyte motherboards (specifically version F11). These are binary files used to flash system firmware and should not be opened as text.
Convert.Guru analyzes your F11 file, detects the exact format, and lets you read the text inside.
If you want to convert F11 file to TMP, TEMP, CACHE, LOG, BAK, OLD, NEW, PART, DOWNLOAD, CRDOWNLOAD, LOCK or PID, you can use ROS Offline Application or similar software from the "Irish Income Tax Return" category. In the File menu, look for Save As… or Export….
To convert DEVICE, CACHE, SOCK, SYMLINK, PID, MOUNT, FIFO, LOG, PIPE, TMP, JUNCTION or TEMP files to F11, try ROS Offline Application or another comparable tool in the "Irish Income Tax Return" category.
The F11 Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our F11 converter.