UEFI BIOS Editor

This utility can parse the standard UEFI BIOS image to extract the firmware volumes, firmware files, sections, variables IFR, etc.

Update History

Sep 06, 2026

• Releases are now also published on GitHub: github.com/iorlvskyo/UefiBiosEditor-Releases.
• Much faster opening of large images (the firmware and PCD trees now load on demand).
• Fixed some bugs.

Jul 19, 2026

• Moved to .NET 8. The .NET 8 Desktop Runtime is required now.
• Added Setup browser: browse the Setup screens interactively from the HII data, with dynamic visibility and values joined to their variables.
• Added Flash Map: whole-flash usage (per-FV used/free/%) reverse-engineered from the image.
• FFS editing: Replace accepts a larger file now (the FV is rebuilt automatically), and Insert FFS / Remove FFS / Export Decompressed were added.
• The saved image is re-parsed to verify itself after Save As.
• AMD support improved: PSP / BIOS firmware directories, AMD microcode, and zlib PEI FVs are parsed now.
• Intel OSSE region is parsed (layout table, BPDT boot partitions, $CPD modules), in the firmware tree and in Flash Map.
• The toolbar search runs across all tabs now and reports the matches per tab.
• Added Compare ROMs and Compare Setup to diff two opened images.
• Added Data Inspector (Ctrl+I).
• Setup settings and the variable list can be exported.
• High-DPI support, unsaved-change warning, and other UI improvements.
• Fixed some bugs.

Apr 16, 2026

• Fixed issues.
• Improved ME parser.
• Support Boot Guard.
• Support AMD (testing).

Oct 05, 2022

• Fixed an exception for the old PCD version.
• Improved the code to find FIT and Microcode.

Apr 16, 2022

• Updated the EfiCompress code to fix the exception when when decompressing some BIOS.

Feb 26, 2020

• Fixed some bugs.

Feb 23, 2020

• Improved the parsing speed.
• DEPEX can be parsed.

Feb 20, 2020

• Update UI.
• Fixed some bugs.
• Search and Find are available in VFR.

Feb 10, 2020

• Fixed an UNI exception for some BIOS.

Jan 30, 2020

• Improved EFI Variable.
• Fixed some bugs.

Jan 19, 2020

• Fixed some bugs.

Oct 24, 2019

• Fixed some bugs.

Aug 07, 2019

• Added language support.

Aug 02, 2019

• Added Variable compare function.
• The selected image name will be shown on the title.
• Fixed some bugs.

Feb 22, 2019

• Fixed the problem that IFR couldn't be found.
• Fixed some bugs.

Feb 21, 2019

• Added BootOption editor.
• Added DevicePath converter.
• Variable list is sortable now.
• Fixed some bugs.

May 18, 2018

• Changed FFS2 ExtendedSize to UINT64.
• Fixed some bugs.

Dec 19, 2017

• Fixed some BIOS couldn't find IFR data.

Nov 20, 2017

• Variable compatibility enhanced.

Nov 05, 2017

• IFR interpreter improved.
• Convert UNI to text.
• Convert IFR from text.
• Convert IFR from binary.

Oct 29, 2017

• Fixed some bugs.
• IFR interpreter improved.
• Firmware Contents Signed supported.

May 11, 2017

• Parse the default variable value. 

September 05, 2016

• Implemented VFR browser. It now can view the contents of VFR and UNI in the VFR page. 
• EFI Compress and Tiano Compress supported.

June 28, 2016

• The first version released.

Download: the latest version is on GitHub Releases.

DevicePath Converter

This utility can convert the UEFI device path.

Update History
Nov 01, 2017

• Fixed the minor bug.

May 16, 2017

• Fixed the minor bug.

March 29, 2017

• The first version released.

Download:
DevicePathConverter.7z

HID Report Descriptor Parser

I studied HID a while ago, so I developed an application to convert HID report descriptor.
Please try it if you are interested.





Link：Google Drive