Files with x03 extension are used by Paradox program. They include some index information.
Software that open x03 file
X03 file extension - Corel Paradox secondary index file
What is x03 file? How to open x03 files?
The x03 file extension is associated with Paradox, a relational database management system sold by Corel Corporation, which is part of some editions of Corel WordPerfect Office suite.
The .x03 files contain secondary index information.
The default software associated to open x03 file:
Company or developer:
Corel Corporation
Paradox is a relational database management system currently published by Corel Corporation. It was originally released for DOS by Ansa Software, but a Windows version was released by Borland in 1992.
Company or developer:
Corel Corporation
WordPerfect Office is an complete office suite developed by Corel Corporation. Latest version is WordPerfect Office X8, available in some editions: Home & Student, Standard and Professional.
Probably most known programs that are included in WordPerfect Office are word processor called WordPerfect, a spreadsheet Quattro Pro, presentation program Presentations and database management system Paradox.
List of recommended software applications associated to the .x03 file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open x03 file, edit x03 file, convert x03 file, view x03 file, play x03 file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with x03 file - Corel Paradox secondary index file
Click on the software link for more information about Corel Paradox. Corel Paradox uses x03 file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
Microsoft Windows:
Main software associated with x03 file by default:
Corel Paradox
Corel WordPerfect Office