Opening an F1 File

The F1 file type is primarily associated with 21st Century Mahjong.

F1	File extension: F1
	File type:	21st Century Mahjong files

What is an F1 file?

F1 files mostly belong to 21st Century Mahjong. Use our "Online F1 Text Viewer" below to analyze your F1 file and to see all text it contains.

How to open F1 files

You need a suitable software like 21st Century Mahjong to open an F1 file. You need a suitable software like 21st Century Mahjong to open an F1 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 F1 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a F1 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online F1 Text Viewer

Choose your .f1 file to analyze

or drag and drop it here

Online File Viewer

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4 Steps to Open an Unknown .F1 File

F1 files can originate from various programs and aren't universally openable.

Identify the Source: If from a retro gamer, it may be a 21st Century Mahjong save. If from an engineer, it could be Fluke ScopeMeter data.
Check the Header: Inspect the first bytes in a text or hex editor:
- Readable text or XML suggests a configuration file.
- "PK" indicates a standard ZIP archive.
- Binary gibberish often means proprietary game data.
Use the Original Software: The original program is usually required, such as 21st Century Mahjong or FlukeView; if uncertain, ask the sender.
Use this Webpage: Drag and drop the file into our viewer to detect the format, extract readable text or metadata, and preview when possible.

Technical Data for F1 File Extension

Related files:

_f1, f1s, f1t, f1f, f1lap, f2, check, f, rom, s1, wf1

an f1 21st Century Mahjong file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with F1 files

Associate the F1 file extension with the correct application.
Update your software that should actually open 21st Century Mahjong files. Because only the current version supports the latest F1 file format. Search, therefore, e.g. on the manufacturer website after an available 21st Century Mahjong update.
To make sure that your F1 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .F1 file online - secure, fast, and no downloads needed.