Extract text from firmware interface files (EFI)
To convert EFI firmware files to another format, you need UEFI Firmware or other Executable software.
To convert other file formats to the "System Boot File" file type, you need software like UEFI Firmware or a similar tool.
The .efi file format is an Extensible Firmware Interface boot executable. Modern computers use these files to start the operating system before loading hardware drivers. The motherboard's firmware reads the .efi file directly from the EFI System Partition (ESP). Common examples include bootx64.efi for 64-bit systems.
Standard software cannot open this file. It is a compiled binary structured in the PE/COFF format, similar to Windows executables. Opening it in a standard text editor yields unreadable characters. Because it is system-critical, modifying an .efi file without specialized knowledge usually makes a computer unbootable.
Converting .efi to readable document formats like PDF or DOCX is impossible because it contains machine code, not text. Users typically want to convert or bundle .efi files into ISO or IMG disk images to create bootable USB drives or virtual machine boot media.
This file format is difficult to open or convert because it is a low-level system binary. Standard online converters fail to process it. Often, only the original compiling software or advanced reverse-engineering tools like Ghidra or IDA Pro can properly read or export the data. If our analysis detects a supported underlying or embedded format, viewing or conversion may still be possible.
Convert.Guru analyzes your EFI file, detects the exact format, and lets you read the text inside.
Users also converted BOOTMGR, MUI, EIF, BCD, TXT, ISO, EXE, INF, PDF, ZIP, JPEG, LOG and PNG files.
If you want to convert EFI file to GPT, MBR, NTFS, ISO, SYS, DLL, EXE, DRV, VXD, 386, COM or BAT, you can use UEFI Firmware or similar software from the "UEFI Boot Executable" category. In the File menu, look for Save As… or Export….
To convert MSI, EXE, REG, MST, LNK, CAB, CAT, DRV, INF, SYS, MSU or DLL files to EFI, try UEFI Firmware or another comparable tool in the "UEFI Boot Executable" 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 EFI converter.