Extract text from NSH files
To convert your NSH file to another format, you need UEFI Shell or other Developer software.
To convert other file formats to the "System Automation Script" file type, you need software like UEFI Shell or a similar tool.
.NSH files primarily serve as UEFI Shell Scripts, acting as the pre-boot equivalent of BAT files for the Unified Extensible Firmware Interface. These text-based scripts automate critical low-level tasks - such as flashing BIOS firmware, setting environment variables, or launching hardware diagnostics - before the operating system loads. A major point of friction is that .NSH files cannot be executed directly within Windows or macOS; they require booting into the EFI Shell, making them inaccessible for standard users trying to apply firmware patches.
A secondary common use is as NSIS Header Files for the Nullsoft Scriptable Install System. In this context, the file contains reusable macros, constants, and functions intended to be included in a main NSI compilation script. The limitation here is that an .NSH file is not a standalone executable; trying to compile it directly will fail.
Since both primary formats are plain text, the most practical conversion is to TXT for safe code inspection and editing using tools like Notepad++ or Visual Studio Code. For archiving system documentation or sharing script logic without risk of modification, convert to PDF. If you are handling MyChat logs (a rarer use case), converting to CSV or HTML allows for easier conversation analysis.
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 "UEFI Shell Script" 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 "UEFI Shell Script" 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.