Opening GB1 Files

The GB1 file type is primarily associated with Game Maker.

GB1	File extension: GB1
	File type:	backup file

What is a GB1 file?

GB1 files mostly belong to Game Maker by YoYo Games Ltd. GB1 file is created by the application Game Maker. Game Maker application is developed by the YoYo Games Limited.. Game Maker allows user to create computer games without implementing coding knowledge. GB1 file stores whole project process and data backup. GB1 file may store animated graphics files, music files, video files. If user edit any saved file on Game Maker application, GB1 file is automatically created to save the process data. GB1 file allows user to restore process from previous point.

How to open GB1 files

You need a suitable software like Game Maker to open a GB1 file. You need a suitable software like Game Maker from YoYo Games Ltd. to open a GB1 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 GB1 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a GB1 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online GB1 Text Viewer

Choose your .gb1 file to analyze

or drag and drop it here

Online File Viewer

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.GB1 File Won't Open? Here is What You Can Do

Because .GB1 files come from various programs, they aren't universally openable.

1. Identify the Source: A file from a game developer is likely a Game Maker backup. If from a retro gamer, it may be a Game Boy emulator save state.
2. Check the Header: Inspect the first bytes in a text editor or hex viewer:
   • Readable XML/JSON often indicates a project backup.
   • Random binary data suggests a proprietary format or emulator save.
3. Use the Original Software: The original program is usually required; try YoYo Games Game Maker, VisualBoyAdvance, or ask the sender if uncertain.
4. Use this Webpage: Drag and drop your file here to detect the format, extract readable text or metadata, and preview it when possible.

GB1 file format details:

A file format defines how the data in the file is structured. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. However, different programs can use the same file extension, and file extensions can be assigned incorrectly. When there is a problem with a file, the first step to solving it is to determine the file format. In the following you will find our evaluation of the GB1 files:

As a file extension, GB1 isn't very common and predominantly uses a uniform format. The two most common formats are as follows:

• 90% of all GB1 files start with the bytes 91 D5 12 00, which are crucial for this file format. These files contain neither text nor words, but only data. The files are on average 1 MB in size and range from 22 KB to 19 MB. The file type was created 10 years ago, but is still used today. Such GB1 files store data about game, maze, engine, platformer, hotline, tester, clown and room.
• 4% of all GB1 files use the same file format, which have the signature G04 Image Parameters *** . 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. A typical file size is 10 KB. Certain words are almost always found in the files, such as G04 Image Parameters ***.

All other GB1 files (6%) have no consistent format. Often described as project. If you want to find out which format your GB1 file belongs to, just click on the button "Choose your .gb1 file to analyze".