bdt

.bdt — Broderbund Thumbnail

Broderbund · 1990s

Developer

Broderbund

Key Features

Proprietary Broderbund format
Stores compressed thumbnail images
Optimized for quick previews
Typically embedded within other Broderbund project files

Best For

Internal use within specific Broderbund applications
Fast loading previews in older software
Reducing storage space for image indexes

Less Ideal For

General image sharing online
High-quality image archiving
Use in modern graphics editing software
Cross-platform compatibility without conversion

Common Use Cases

Visual preview of images in Broderbund software
Thumbnails for family tree elements
Previsualization of scrapbook pages
Index images within larger Broderbund projects

How to Open It

Attempt to open with the original Broderbund software that created the file (e.g., Family Tree Maker).
Use a dedicated image converter tool that supports Broderbund formats.
If embedded, extract the thumbnail directly from the parent Broderbund project file using its internal tools.
Some generic image viewers might recognize and display them, but this is uncommon.

What is a .bdt file?

The .bdt file extension is primarily associated with Broderbund software, often used for storing small thumbnail images. These thumbnails were typically generated by applications like Broderbund's family tree or digital scrapbook software to provide a quick visual preview of larger images or projects within the application's interface. While not a standard image format for general use, they served a specific purpose for managing visual assets within Broderbund's ecosystem. Accessing or converting these files usually requires the original Broderbund software or specialized image converters.

Programs That Open .bdt Files

Platform	Program
Windows	Broderbund Family Tree Maker	Paid	Official

How to Convert .bdt Files

Format	Method
.PNG	Broderbund software export, Online file converters
.JPG	Broderbund software export, Online file converters

Common Problems with .bdt Files

⚠️ Cannot open .bdt file directly in standard image viewers.

Use the original Broderbund software or a specialized converter that recognizes the format.

⚠️ File might be corrupted or incomplete.

Try to re-extract the file from the original Broderbund project or source.

Frequently Asked Questions

Are .bdt files standard image files?▼

No, .bdt files are proprietary thumbnails created by Broderbund software and are not intended for general image use.

Can I edit a .bdt file?▼

Editing .bdt files directly is difficult due to their proprietary nature and compression. It's usually best to convert them to a standard format like PNG or JPG if editing is required.

Technical Details

Broderbund Thumbnail (.bdt) files are a proprietary binary format. They contain compressed image data, optimized for small file sizes and fast loading times as previews. The exact compression algorithm and internal structure are specific to Broderbund and may vary slightly between different software versions.

Did You Know?

The .bdt format was likely developed to speed up the loading of image previews in memory-constrained systems of the 1990s.

While Broderbund is no longer an independent company, some of its legacy software might still be in use, leading to occasional encounters with .bdt files.

Security Information

Like most file types, .bdt files can potentially be a vector for malware if downloaded from untrusted sources. Always ensure your antivirus software is up-to-date and exercise caution when opening files from unknown origins.