Opening FBS Files

The FBS file type is primarily associated with flatc.

FBS	File extension: FBS
	File type:	schema definition file

What is an FBS file?

FBS files mostly belong to flatc. The FBS file is used in several specific ways. In most cases it is a FlatBuffers schema definition file. This file contains the rules and structure that define how data is serialized with the FlatBuffers system. It is typically written in plain text and processed by the FlatBuffers compiler (flatc).

• FlatBuffers schema definition: The file lists data structures and types so that code can be generated to read and write binary data. More details are available at FlatBuffers Grammar.
• VNC screen recording: Some FBS files record data from a VNC session using the RFB protocol. These files work with applications like TightVNC.
• Game save file: In a few cases, FBS files store game state data, as seen with titles such as Resident Evil Village. They may use a binary format based on FlatBuffers.
• FastBid Sheet file: A smaller group of files uses this extension to hold sheet data in a format based on TIFF.

FilExt.com tip: To view a FlatBuffers schema file, open it in any plain text editor or use the flatc tool to compile and work with it. For VNC recordings or game save files, you will need the appropriate specialized software.

How can I open an FBS file?

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

Online FBS Text Viewer

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Online File Viewer

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FBS file format:

Why is it important to know the file format? This is the only way to find out which program to use to open the file. 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. If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. Knowledge is power - this also applies when dealing with unknown or faulty files. In the following you will find our evaluation of the FBS files:

The FBS file extension is not found very often and covers a large number of different file formats. The two most common formats are as follows:

• 15% of all FBS files start with the bytes namespace , which are crucial for this file format. The contents of these files can even be read by a human. The average file size is 410 bytes with most files being between 180 bytes and 5 KB in size. Certain words are almost always found in the files, such as table, enum, byte, facebook, flatbuffer, namespace com and omnistore. A usual file name is ContactOmnistoreSchema.fbs. Such files are related to messenger, archive, montage, clan, preferences, encounter and flat.
• 15% of all FBS files internally utilize the Source file format. A source code is the set of instructions written by a programmer using a computer programming language like JavaScript, C++ or Basic. This code is translated into machine language by a compiler. The translated result is called app, program or executable. These files are text files, so they contain words and text. The average file size is 2 KB with most files being between 970 bytes and 24 KB in size. Several words can almost always be found in the files, e.g. // Copyright 2004-present Facebook. All Rights Reserved, // _GENERATED_GRAPHQL_ Created by rebuild-graphql/build-omnistore-flatbuffer-schema and generated SignedSource. A usual file name is MessengerCallSchema.fbs or FBMMontageMessageInfo.fbs. Files like these are sometimes connected to call, fbmmontage, message, info, fbmessenger, invite and link.

All other FBS files (70%) have no uniform format, often e.g. ZIP, TIFF, FBS and include. They are often associated with save, recording, specs, slot, saveslot, config, boss or list. Drag & drop your file here to see the file format and a preview of your FBS file!