Open-The-File.com

Find how to open any file type

.BSD file extension

To open .BSD files on Windows, confirm the file’s origin: ask the sender which application generated the .BSD file and whether it is a Crossfire/Beilstein export.

To open a .BSD file, first confirm it is a Beilstein Crossfire (chemical/x-crossfire) file, then open it with the chemistry/Crossfire-compatible software that created it. If you do not have that software, try identifying the file type on a desktop system and request an export to a more common chemistry format from the sender.

HomeExtension IndexData in indexData category page

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 .BSD files

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

Windows

  1. Confirm the file’s origin: ask the sender which application generated the .BSD file and whether it is a Crossfire/Beilstein export.
  2. If you have the originating chemistry/Crossfire-compatible software installed, use its File → Open (or Import) rather than relying on double-click.
  3. If you do not have compatible software, request the sender to export/convert it to a format your tools support (do not rename the extension as a “conversion”).
Full Windows guide

Mac

  1. Confirm the file’s origin and the producing software (many systems will not recognize .BSD automatically).
  2. Open it from within the relevant chemistry/Crossfire-compatible application using File → Open/Import.
  3. If you lack the right app, transfer the file to a system where the producer’s software is available or request an exported alternative format.
Full Mac guide

Linux

  1. In a file manager, check the detected type; many distributions map *.bsd to chemical/x-crossfire via shared-mime-info.
  2. Try opening it with the chemistry/Crossfire-compatible application you use for chemical data; if none is associated, set an application association via “Open With…”.
  3. If detection is wrong or it still will not open, verify the file source and request an export to a better-supported format.
Full Linux guide

iOS

  1. iOS is unlikely to have common native support for Crossfire/Beilstein .BSD files; use the Files app only to store/share it.
  2. Send the file to a desktop system with the correct chemistry/Crossfire-compatible software, or ask the sender for an exported format your iOS apps can read.
Full iOS guide

Android

  1. Android is unlikely to have common native support for Crossfire/Beilstein .BSD files; treat it as a file to transfer rather than open directly.
  2. Upload/share it to a desktop system with the producing chemistry/Crossfire-compatible software, or request an exported alternative format.
Full Android guide

Security notes

  • .BSD (chemical/x-crossfire) is a data file, but it may still trigger vulnerabilities in complex file parsers; only open it in trusted, up-to-date chemistry software, especially if it came from an untrusted source.
  • Do not trust the .bsd extension alone: attackers can rename files to .bsd to bypass casual checks. Verify the sender and, when possible, confirm the detected type/content on a desktop system before opening.
  • If your system auto-opens files on download or double-click, disable auto-open behavior for unknown file types and use the application’s controlled Import/Open workflow instead.

Recommended antivirus software

Scan files before opening them. These antivirus tools help protect against malware and viruses.

Avast

Avast offers free and premium antivirus software that protects against viruses, malware, ransomware, and phishing. Scan files before opening them to ensure safety.

Norton

Norton 360 delivers comprehensive antivirus protection, VPN, and identity theft monitoring. Scan files for threats before opening to keep your device secure.

We may earn a commission when you use affiliate links. This supports our free file extension guides.

Can't open this file?

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

Common reasons

  • The file opens with the wrong app or shows as an unknown type
  • “File is corrupted” or import fails
  • No software available on mobile to view it

Fix steps

  1. Ask the sender what application created the file and whether it is a Beilstein Crossfire/Crossfire-related export.
  2. On Linux, update/rebuild MIME databases if needed and re-associate the file to the correct application via “Open With…”.
  3. Open from within the intended chemistry application using an Import/Open command instead of double-click.

OS-specific troubleshooting

What is a .BSD file?

In common desktop MIME databases, *.bsd is mapped to the non-IANA-registered MIME type chemical/x-crossfire, associated with Crossfire/Beilstein chemical information files. The .bsd extension is therefore best treated as an application-specific chemical data container rather than a general-purpose “BSD data” format. Because .bsd is extension-based identification, the safest workflow is to verify the actual file type/content before choosing a viewer or converter.

Background

The most widely documented meaning of the .bsd extension in public format registries is a Crossfire/Beilstein chemical file, commonly labeled chemical/x-crossfire in Linux shared-mime-info databases. This mapping is used by desktop environments to guess a file’s type based on its filename glob (for example, *.bsd) and then pick an associated application.

Unlike IANA-registered media types, chemical/x-crossfire appears as an “x-” (unregistered) type used in community MIME databases rather than in the official IANA registry. That means different systems may not agree on how to label or open .bsd files, and double-click behavior can vary widely.

In practical use, .bsd files are typically exchanged within chemistry/chemical-information workflows tied to Crossfire/Beilstein data. If you received a .bsd file unexpectedly or do not know its origin, treat it as a specialized data file and ask the sender what application produced it and whether they can export it to a more common interchange format for your tooling.

Common MIME types: chemical/x-crossfire

Further reading

Authoritative resources for more details on the .BSD format.

Common .BSD issues

The file opens with the wrong app or shows as an unknown type

.BSD is not universally recognized across operating systems, and the chemical/x-crossfire identification is primarily a desktop MIME-database convention rather than an official, globally registered media type.

  1. Ask the sender what application created the file and whether it is a Beilstein Crossfire/Crossfire-related export.
  2. On Linux, update/rebuild MIME databases if needed and re-associate the file to the correct application via “Open With…”.
  3. Open from within the intended chemistry application using an Import/Open command instead of double-click.

“File is corrupted” or import fails

The file may be incomplete (transfer/download issue) or not actually a Crossfire/Beilstein file despite the .bsd extension.

  1. Re-download or re-copy the file and compare file size/checksum if the sender can provide one.
  2. Verify the format with the sender; request a fresh export from the source system.
  3. If you suspect the extension is misleading, identify it by content on a desktop system before trying other tools.

No software available on mobile to view it

Crossfire/Beilstein .BSD files are specialized chemical data files and typically require desktop chemistry software; mobile platforms often lack compatible viewers/importers.

  1. Transfer the file to a desktop OS where the appropriate chemistry/Crossfire-compatible tool is available.
  2. Ask the sender for an export to a more commonly supported chemistry interchange format used by your toolchain.

FAQ

What does a .BSD file usually contain?

Most public format references for .bsd point to a Crossfire/Beilstein chemical data file, commonly labeled chemical/x-crossfire in desktop MIME databases.

Is chemical/x-crossfire an official (IANA) MIME type?

No. It appears in community MIME databases (for example, shared-mime-info) but is not an IANA-registered media type in the official IANA Media Types registry.

Can I convert a .BSD file by renaming it?

No. Renaming only changes the filename. To convert, you need an export/conversion function in the software that can actually parse the Crossfire/Beilstein data.

Why won’t my computer recognize the .BSD file?

Because .bsd is not universally mapped to a single, officially registered format across all operating systems. On Linux it is often mapped via shared-mime-info, while other platforms may not have a default association.

Similar file extensions

Compare related formats in the same category to find the right tool faster.