Opening an NGC File

The NGC file type is primarily associated with ISE.

NGC	File extension: NGC
	File type:	PCB netlist

What is an NGC file?

NGC files mostly belong to ISE by Xilinx. An NGC file is the netlist of a printed circuit board designed with ISE (Integrated Synthesis Environment) for HDL-based electronics design automation. A netlist (NGC file) contains instructions which a machine tool must execute in order to fabricate a PCB. Such instructions include the pin (hole) size, XY coordinates for each node on the board, constraints etc. Unlike most netlist formats, NGC stores data in binary form. ISE has been discontinued and NGC format is not supported in recent versions of Vivado Design Suite which replaced ISE.

How to open NGC files

You need a suitable software like ISE to open an NGC file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your NGC file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a NGC file directly in the browser:. Just drag the file onto this browser window and drop it.

Online NGC Text Viewer

Choose your .ngc file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert NGC files:

ISE by Xilinx
See the previous paragraphs to learn more about the main application. NGC files are often referred to as ISE cads because this type of file is primarily created or used by this software.
LinuxCNC (CNC program) by Linux CNC Community
LinuxCNC is a Linux program for driving and controlling milling machines, 3D printers, robot arms, lathes, and hexapods. It can load and execute G-code (CNC programs) saved in an NGC file. This file format is classified as CAD.
NeoPop (game cartridge image) by Emulator zone
NeoPop is a desktop application that emulates Neo Geo Pocket Color handheld game console. It can load and run an NGC file containing the disk image of a game cartridge. This file format is classified as Game.
Vivado (netlist) by Xilinx
Vivado is a software suite for designing, synthesizing, and analyzing hardware systems using hardware description language. NGC is one of its supported formats for saving a netlist. A netlist is a description of the connections on an electronic circuit. NGC netlist format was originally introduced in Integrated Synthesis Environment. This file format is classified as Data.

NGC file format:

Every file has a defined file format, i.e. how the data is arranged in the file. A file format is determined by the file extension and signature, so JPEG images have the extension .jpg and the first bytes in the file are ÿØÿ. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. So a detailed analysis of a file is vital in order to determine the format and the associated program. Below you will find our evaluation of the NGC files:

The NGC file type includes different formats for the applicable programs. The two most common formats are as follows:

25% of all NGC files start with the magic bytes % (, which are always the first bytes of this file format. These files are text files, so they contain words and text. The file size is in the range of 1 KB to 160 KB. This file type is based on cutting-edge technology. The keywords (Generated by gcodetools from Inkscape.), (Header end.), (Header), (Using default header. To add your own header create file "header" in the output dir.), G21 (All units in mm) and (Start cuttin are typical for these files. An example of a file name is output_0001.ngc. These files can be linked to logo.
10% of all NGC files are Xilinx Netlist files. These files are plain text, which means they can be viewed with any text editor such as Windows Editor, Nano for Linux, and TextEdit for macOS. The files are often between 3 KB and 2 MB in size. The keywords XILINX-XDB 0.1 STUB 0.1 ASCII, XILINX-XDM V1.6e and 0123456789 are typical for these files. These files can be linked to fifo.

All other NGC files (65%) have no uniform format, the following 9 formats exist: NeoGeo game cartridge, Gener and NGSNextGen. The category is pocket, japan, code, adventure, sonic, world or write. If you want to find out what your NGC file contains, drag and drop it onto this page.

Technical Data for NGC File Extension

File classification:

CAD

Related files:

ngs, zip, jed, v, xci

Mime type:

application/octet-stream

an ngc PCB netlist is a special file format by Xilinx and should only be edited and saved with the appropriate software.

How to solve problems with NGC files

Associate the NGC file extension with the correct application.
Update your software that should actually open pcb netlists. Because only the current version supports the latest NGC file format. Search, therefore, e.g. on the Xilinx manufacturer website after an available ISE update.
To make sure that your NGC file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
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