Which MIME types are related to file extension ".pbt"?

The .pbt file extension is associated with 2 MIME types:

application/octet-stream, text/plain.

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

About .pbt Files

PBT files are used in two distinct ways. They can either serve as PocketBook Themes or as PowerBuilder Targets.

For PocketBook themes, PBT files use the MIME type application/octet-stream. They are in a binary format. This type of file contains data to define the appearance of PocketBook e-readers such as layouts, fonts, and color schemes.


For PowerBuilder targets, PBT files are plain text files using the MIME type text/plain. In this context, they store configuration data, build settings, or script targets for developing applications with PowerBuilder.

According to FilExt.com, the PBT extension covers both these uses, each with its specific format and application.

Relationship between file extension and MIME type

A file extension is a suffix at the end of a filename that indicates what type of file it is. File extensions help both users and operating systems identify what application should be used to open the file.

File extensions are typically separated from the filename by a period (dot) and consist of 2-4 characters, though they can be longer. For example, in the filename "document.pdf", ".pdf" is the file extension.

File extensions are closely related to MIME types, as they both serve to identify the format of a file. However, while MIME types are used primarily by web browsers and servers, file extensions are used by operating systems and applications.

Associated MIME types

application/octet-stream, text/plain

FAQs

What is a .pbt file?

A .pbt file typically serves one of two purposes: it is either a PocketBook Theme used to customize e-readers, or a PowerBuilder Target file used in software development. The PocketBook version contains binary graphics and layout data, while the PowerBuilder version is a plain text configuration file.

How do I open a PBT file on my computer?

If the file is a PowerBuilder Target, you can open it with Appeon PowerBuilder or any text editor like Notepad or Notepad++. If it is a PocketBook Theme, you cannot 'open' it on a PC; you must transfer it to a PocketBook e-reader to use it.

How do I install a PocketBook PBT theme?

Connect your PocketBook e-reader to your computer via USB. Copy the .pbt file into the system/themes folder on the device (you may need to enable 'Show hidden files' to see this folder). Once copied, disconnect the device and select the new theme in the Settings > Personalize menu.

Can I edit a PowerBuilder PBT file manually?

Yes, because PowerBuilder Target files are plain text, you can edit them with standard text editors. However, it is safer to modify project settings within the PowerBuilder IDE to ensure the syntax for library lists (LibList) and application objects remains correct.

What is the MIME type for PBT files?

The MIME type varies by format: PowerBuilder files are text-based and generally use text/plain, while PocketBook themes are binary files classified as application/octet-stream. For more information on these types, you can visit mime-type.com.

Why does my text editor show weird symbols when opening a PBT file?

If you see garbled text or symbols, you are likely trying to open a PocketBook Theme file in a text editor. These are binary files and are not meant to be read by humans; they are strictly for the e-reader's operating system to process.

Are PBT files compatible with Mac or Linux?

PowerBuilder is primarily Windows-based, so the IDE is not native to Mac or Linux, though the text files can be edited anywhere. PocketBook Themes are platform-independent regarding the device itself, but you can transfer the files from any OS (Windows, macOS, or Linux) that supports USB file transfer.

General FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why can one extension have multiple MIME types?

Different programs and historical usage may assign various MIME identifiers to the same file format. Listing them together helps maintain compatibility across tools.