EFI File Documentation

Overview

Feature Value
Format Name Extensible Firmware Interface File
File Extension .efi
MIME Type application/x-efi
File Signature Varies; PE (Portable Executable) for Windows
Primary Use Firmware executables for computers with UEFI
Developed by Unified EFI Forum
Binary Format Yes
Architecture x86, x86-64, ARM, Itanium
Operating System Compatibility Platform Independent
Editable No
Encryption Depends on implementation
Compression Depends on implementation
Bootability Yes
Execution Mode Pre-OS Environment
Relevance Essential for UEFI-based systems
Signature Verification Supported
Default Location EFI System Partition (ESP)
Common Tools UEFI Shell, EFIBOOTMGR
File System FAT32 on EFI System Partition
Accessibility During Boot Time
Security Feature Secure Boot