FB2 File Extension
FictionBook 2.0 Format
- File Type fb2
- Developer FictionBook
- Popularity
- Application FictionBook Tools
- Category eBook Files
- Format Text
What is a FB2 file?
The FB2 extension is related to FictionBook 2.0 Format and is classified in the eBook Files category, which contains 74 files.
FB2 files are supported by Windows, Linux and Mac OS, as well as mobile phones such as Windows Phone and Apple iOS. If you need to view a FB2 file, you can use one of 14 programs, such as FictionBook, Okular and Bookviser.
File Signature
HEX code: 3C 3F 78 6D 6C 20 76 65 72 73 69 6F 6E 3D 22 31 2E. ASCII code: ?xml version=.
Programs that support FB2 files
Windows
Apple iOS
Windows Phone
Online Services
How to open a FB2 file?
If you’re having difficulty opening a FB2 file, it is often due to not having the correct software. To solve the problem, choose a compatible program from the list. Then follow the link to the official developer site, download the software, and install it on your device.
FictionBook, Okular and Bookviser stand out as the preferred programs to manage FB2 files effectively. To install the current version of FictionBook Tools, go directly to the official Mike Matsnev website. The universal package for all operating systems is available there.
Once FictionBook Tools is installed, the OS should configure it as the default tool for opening FB2 files.
Make FictionBook Tools the default FB2 viewer
Change the default app to open files on Mac
- Right click or use Control + Left Click on the desired FB2 file to access a dropdown menu of actions;
- Choose "Open in Application" and click "Other";
- Towards the bottom of the window, find the "Enable" menu, which is already set to the default option, "Recommended Programs";
- In this menu, select "All Programs" and search for FictionBook Tools. Check the box next to "Always open in app" to make it the default option.
Set default programs for Windows
- Start by right-clicking on your FB2 file, then select "Open With" and continue by clicking "Choose another app" from the options provided;
- Inside the popup window, scroll through the list of applications and specifically choose FictionBook Tools as the application to associate with your FB2 file;
- Check the "Always use this app" checkbox and click "OK".
Convert files to and from FB2
For difficult FB2 files, try converting them to formats like MP3, PDF, EPUB, MOBI, AZW or similar formats to improve usability.
Be aware that converting a FB2 file may reduce some features, but you can usually revert it to the original format.
Hamster Free eBook Converter and Calibre are offline programs that convert FB2 files to alternative formats without compromising data quality.
Convert FB2 to other file formats
Converting Files to FB2 Format
Finding answers to FB2 file problems
If FB2 files are giving you trouble, small modifications to your software can help. Check out the troubleshooting tips below to fix these issues.
What are the methods to detect if my FB2 file has been corrupted?
FB2 ebook files that have become corrupted may display one or more of the following symptoms:
- Unexplained FB2 file size inflation;
- The file stops responding or freezes in FictionBook Tools or other programs;
- The file does not respond or shows errors when opening it;
- While working with the file, error alerts are encountered;
- The file exhibits poor performance during editing operations in FictionBook Tools;
Why does FictionBook Tools crash or shut down frequently?
Insufficient software updates can contribute to FictionBook Tools crash. To avoid this, make sure that you have installed the latest updates for Mike Matsnev products.
A computer restart is often the key to solving numerous common problems. That’s why, it is recommended to restart the computer before making any changes to the software settings.
Is there any specific software or utility that can help repair a damaged FB2 file?
Open the damaged FB2 file in a recovery program and select the "Repair" menu item to start the repair operation. Wait for the recovery process to finish, allowing automatic repair of damaged ebook files.
How to edit a FB2 file?
To make changes to FB2 files, you need specialized software that allows both opening and editing the ebook files. Online FB2 editors offer fewer capabilities than applications optimized for FictionBook 2.0 Format.
Best FB2 Editor Software in 2026
According to these factors, we have compiled a list of available FB2 editors.
| FB2 Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| FictionBook Tools | Mike Matsnev | Windows | 4.2 out of 5 (37 reviews) |