Extract text from BIOS update files (FL1)
To convert FL1 BIOS updates to another format, you need Lenovo System Update or other System software.
To convert other file formats to the "BIOS Update File" file type, you need software like Lenovo System Update or a similar tool.
The .FL1 file is a proprietary firmware package used exclusively by Lenovo to update the BIOS (Basic Input/Output System) or UEFI on their desktop and laptop computers, such as ThinkPad and IdeaPad models. These files contain low-level binary instructions required to patch system vulnerabilities or improve hardware compatibility.
Typically, .FL1 files are flashed to the motherboard's EEPROM chip using official utilities like Lenovo System Update or legacy tools like WinPhlash. This format is highly hardware-specific and often compressed or encapsulated. Users encounter significant limits because the file cannot be opened natively by Windows or macOS, and applying an incorrect file can permanently brick a motherboard. Because it is a proprietary format, it requires specific vendor utilities to execute safely.
Users often seek to convert or extract .FL1 files to standard BIN or ROM formats. This is usually necessary for manual flashing using hardware programmers (like the CH341A) or for custom BIOS modifications. Standard online converters fail to process these files because they are closed, proprietary binary payloads, not media or documents.
Convert.Guru analyzes your FL1 file, detects the exact format, and lets you read the text inside.
If you want to convert FL1 file to , you can use Lenovo System Update or similar software from the "System BIOS Firmware Update" category. In the File menu, look for Save As… or Export….
To convert files to FL1, try Lenovo System Update or another comparable tool in the "System BIOS Firmware Update" category.
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 FL1 converter.