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.BH2 file extension

To open .BH2 files on Windows, if you have Fujitsu OASYS Presentation installed, open the program first and use its Open command to select the .BH2 file.

To open a .BH2 file, use Fujitsu OASYS Presentation if you have access to it. If you do not, ask the sender to export the presentation to a more common format such as PDF or another presentation format rather than renaming the file.

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Last updated: April 29, 2026 · Reviewed by Julian Stricker

Open on your device

Choose your operating system for a dedicated step-by-step opening guide.

How to open .BH2 files

Use these platform-specific instructions to open .BH2 files safely.

Windows

  1. If you have Fujitsu OASYS Presentation installed, open the program first and use its Open command to select the .BH2 file.
  2. Alternatively, right-click the file, choose Open with, and select Fujitsu OASYS Presentation if it appears.
  3. If the program is not available, ask the sender to export the file to a widely supported format, such as PDF or another presentation format.
  4. Do not rename the file extension to .ppt, .pdf, or another type; that will not convert the file.
Full Windows guide

Mac

  1. macOS does not have built-in support for .BH2 files.
  2. If you do not have compatible Fujitsu OASYS software available, ask the sender to export the presentation to a common format.
  3. For identification only, a MIME-aware tool may label it as application/vnd.fujitsu.oasysprs, but that does not mean macOS can display the presentation.
Full Mac guide

Linux

  1. Linux desktop environments do not normally include a viewer for Fujitsu OASYS Presentation .BH2 files.
  2. Use Apache Tika or another MIME-identification tool only to confirm the type; this will not render the presentation contents.
  3. To view the file, obtain an exported copy from the creator or open it on a system that has compatible Fujitsu OASYS Presentation software.
Full Linux guide

iOS

  1. iPhone and iPad do not normally preview .BH2 files in Files or Quick Look.
  2. Ask the sender to provide the presentation in a common format, or transfer the file to a desktop system that has compatible software.
Full iOS guide

Android

  1. Android does not normally include a built-in viewer for .BH2 files.
  2. Avoid random file-opener apps; instead, request an exported version or transfer the file to a system with compatible Fujitsu OASYS Presentation software.
Full Android guide

Security notes

  • Because .BH2 is a binary legacy/specialized format, open it only with trusted software and keep an unchanged backup before attempting recovery or conversion.
  • Do not rely on the extension alone: the official registration notes no magic number, so a file named .BH2 may not actually be a valid Fujitsu OASYS Presentation file.
  • Be cautious with unofficial online converters or unknown mobile opener apps, especially for confidential business presentations.
  • If the file came from an untrusted source, treat it like any unfamiliar document format and avoid opening it on a sensitive system.

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Can't open this file?

These are the most common causes and fixes when .BH2 files fail to open.

Common reasons

  • The .BH2 file opens as unreadable text or binary data
  • No app is associated with .BH2
  • The file type cannot be confidently detected
  • Renaming the file does not make it open

Fix steps

  1. Close the text editor without saving the file.
  2. Open the file with Fujitsu OASYS Presentation if available.
  3. If you only need to know what it is, use a MIME-identification tool rather than editing it.

OS-specific troubleshooting

What is a .BH2 file?

A .BH2 file is associated with Fujitsu OASYS Presentation and the official IANA media type application/vnd.fujitsu.oasysprs. The registered format uses binary encoding, has the filename extension .bh2, and has no defined magic number, so the extension and MIME metadata are often the main clues used to identify it.

Background

.BH2 files are most commonly documented as Fujitsu OASYS Presentation files. OASYS was a Fujitsu office/document software family, and this extension is tied to its presentation component rather than to a general-purpose image, archive, or text format.

The format is registered with IANA as application/vnd.fujitsu.oasysprs. Apache Tika and Apache HTTP Server MIME tables also map this media type to the .bh2 extension, which helps servers and file-identification tools label the file correctly.

Because the IANA registration notes binary encoding and no magic number, many systems cannot reliably recognize a .BH2 file by inspecting its first bytes. If the original application is unavailable, the practical solution is usually to obtain an exported copy from the person or system that created it.

Common MIME types: application/vnd.fujitsu.oasysprs

Further reading

Authoritative resources for more details on the .BH2 format.

Common .BH2 issues

The .BH2 file opens as unreadable text or binary data

.BH2 is a binary presentation-related format, not a plain text file. Text editors may show garbled characters.

  1. Close the text editor without saving the file.
  2. Open the file with Fujitsu OASYS Presentation if available.
  3. If you only need to know what it is, use a MIME-identification tool rather than editing it.

No app is associated with .BH2

Most modern systems do not include native support for Fujitsu OASYS Presentation files.

  1. Check whether you have access to Fujitsu OASYS Presentation or the original OASYS environment that created the file.
  2. Ask the sender or archive owner to export the presentation to a more common format.
  3. Keep the original .BH2 file unchanged in case you later gain access to compatible software.

The file type cannot be confidently detected

The registered media type for .BH2 has no magic number, so detection tools may rely on the filename extension or server-provided MIME type.

  1. Confirm that the file came from a Fujitsu OASYS Presentation workflow.
  2. Check any accompanying email, archive, or documentation for context.
  3. If the file extension was changed, ask for a fresh copy from the source.

Renaming the file does not make it open

Changing .BH2 to another extension only changes the filename, not the internal binary format.

  1. Restore the .BH2 extension if you changed it.
  2. Use the original application to open or export the file.
  3. If conversion is needed, perform it from compatible software rather than by renaming.

FAQ

What program opens .BH2 files?

The documented associated program is Fujitsu OASYS Presentation. If you do not have access to it, the best option is to ask the creator to export the file to a common format.

What is the MIME type for .BH2?

The registered MIME type is application/vnd.fujitsu.oasysprs.

Can I convert a .BH2 file by renaming it?

No. Renaming changes only the filename extension. Conversion must be done by software that understands the Fujitsu OASYS Presentation format.

Why do file-identification tools disagree about my .BH2 file?

The official registration does not define a magic number for this format, so tools may depend on the extension, MIME metadata, or context rather than a reliable internal signature.

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