bdx

.bdxBitstream Data eXchange

Bitstream Inc. · 1993

Developer
Bitstream Inc.
Category
Documents
MIME Type
application/vnd.bitstream.bdx
First Released
1993
Open Format
No
File Signature
Not publicly documented or easily identifiable as a common magic byte sequence.
At a Glance
.bdx
Bitstream Data eXchange

.bdx files are primarily used for storing and exchanging font data, especially for Bitstream's Font Navigator software.

Reviewed on August 2, 2026
Compression
Compressed
Transparency
N/A
Editability
Low
Best for
Font data exchange

Key Features

  • Contains detailed font metrics and character information.
  • Designed for font exchange and management.
  • Proprietary format linked to Bitstream software.
  • Primarily used in older Windows environments.

Best For

  • Managing font collections within the Bitstream Font Navigator ecosystem.
  • Ensuring font compatibility on legacy Windows systems that relied on this format.
  • Archiving font data in a format understood by older design software.

Less Ideal For

  • Modern font distribution and web use (use WOFF, WOFF2, TTF, OTF instead).
  • Cross-platform font sharing (use universal formats like TTF or OTF).
  • Embedding fonts in documents intended for broad compatibility (use standard formats).
  • Creating new font projects.

Common Use Cases

  • Storing font libraries for the Bitstream Font Navigator.
  • Exchanging font definitions between different applications that supported the format.
  • Archiving specific font sets used in older desktop publishing projects.
  • Enabling font portability on systems where it was natively supported.

How to Open It

  1. Attempt to open with older versions of Bitstream Font Navigator if available.
  2. Explore font management utilities from the era (Windows 95/98) that might have supported .bdx.
  3. Consider using font conversion tools that might have legacy support for .bdx, though success is unlikely.
  4. If the file contains text or data, try opening it with a plain text editor to inspect potential readable content.

What is a .bdx file?

The .bdx file format was developed by Bitstream Inc. as a way to exchange font data, particularly for their Font Navigator software. It aimed to provide a structured method for storing and transferring font metrics, character sets, and other essential font information. While useful in its time for font management, it has largely been superseded by more modern and universally adopted font formats. Primarily associated with older Windows operating systems, it's not commonly encountered today.

Programs That Open .bdx Files

PlatformProgram
WindowsBitstream Font NavigatorPaidOfficial

How to Convert .bdx Files

FormatMethod
.TTFBitstream Font Navigator (if available and supports export), Legacy font conversion utilities
.OTFBitstream Font Navigator (if available and supports export), Legacy font conversion utilities

Common Problems with .bdx Files

⚠️ Cannot find software to open .bdx files.
The format is obsolete. Try to find legacy software like Bitstream Font Navigator, or look for specialized font converters, though success is not guaranteed.
⚠️ .bdx files are not recognized by modern operating systems or design software.
This is expected. Convert the font data to a modern format like TTF or OTF using available legacy tools if possible.

Frequently Asked Questions

What is a .bdx file?

A .bdx file is a proprietary font data exchange file format developed by Bitstream Inc., primarily used with their Font Navigator software.

Can I open .bdx files on modern computers?

It is very difficult to open .bdx files on modern computers, as the software that created them is no longer actively supported or widely available. You may need to find very old software or specialized converters.

Is .bdx a standard font format?

No, .bdx is a proprietary format and not a widely adopted standard like TTF or OTF.

Technical Details

Bitstream Data eXchange (.bdx) files are binary files that contain font information. They store data such as font metrics, character mappings, and potentially outline data, making them a proprietary format for managing and sharing fonts. The exact structure is specific to Bitstream's software and is not openly documented.

Did You Know?

Bitstream was one of the pioneers in digital font technology before the widespread adoption of TrueType and OpenType.
The .bdx format was closely tied to the functionality of Bitstream's Font Navigator, a font management utility popular in the 1990s.

Security Information

As a proprietary binary format associated with older software, treat .bdx files with caution. Ensure they originate from trusted sources, as with any file that could potentially execute code or contain unexpected data.