Extract text from UEFI shell scripts (NSH)
To convert NSH scripts to another format, you need UEFI Shell or other System software.
To convert other file formats to the "Shell Script File" file type, you need software like UEFI Shell or a similar tool.
The .NSH file extension is most commonly associated with UEFI Shell Scripts or NSIS Header Files. UEFI scripts are used in the pre-boot environment to automate low-level hardware tasks, such as flashing a motherboard BIOS using utilities like AfuEfix64.efi. Alternatively, NSIS header files store macros and settings used by the Nullsoft Scriptable Install System to compile Windows installers. Minor uses include message history logs for the MyChat messenger or compiled shaders for the CyberConnect2 game engine.
While these files are critical for developers and system administrators, they present several practical disadvantages. .NSH files are highly specialized files that lack native graphical viewer support in standard operating systems. Opening a UEFI script directly in a basic text editor without syntax protection can lead to accidental edits, which could catastrophically break a BIOS update. Furthermore, because these are niche developer extensions, standard file converters do not recognize them.
If you need to share the contents of a .NSH file for code review or documentation, the best target formats are standard TXT, PDF, or DOCX. Converting to these formats makes the code readable on any device. However, you will lose the file's executability; you cannot run a PDF inside a UEFI shell.
Because .NSH files belong to closed firmware environments or specific compiler toolchains, most standard online converters fail to process them. They often assume the file is corrupted. We will inspect the file, bypass system limitations, and show you the internal text. If our analysis detects the standard text structure of a script, viewing or conversion to a standard document format will be seamlessly supported.
Convert.Guru analyzes your NSH file, detects the exact format, and lets you read the text inside.
Users also converted TXT, GDB, OWL and RB files.
If you want to convert NSH file to JS, TS, PY, JAVA, CPP, C, CS, PHP, RB, GO, RS or SWIFT, you can use UEFI Shell or similar software from the "System Boot & Installer Scripting" category. In the File menu, look for Save As… or Export….
To convert SH, PY, KT, PS1, SWIFT, LUA, PL, JAVA, SCALA, JS, VBS or TS files to NSH, try UEFI Shell or another comparable tool in the "System Boot & Installer Scripting" 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 NSH converter.