4db

.4db4D Database File

4D SAS · 1985

Developer
4D SAS
Category
Database
MIME Type
application/x-4d
First Released
1985
Open Format
No
File Signature
Not publicly documented or easily identifiable as a fixed signature due to its complex binary structure.
At a Glance
.4db
4D Database File

.4db files are proprietary database files used by the 4D database management system.

Reviewed on May 13, 2026
Compression
Varies
Transparency
No
Editability
High (within 4D)
Best for
4D database applications

Key Features

  • Stores relational data, forms, and application logic.
  • Proprietary binary format for 4D database system.
  • Supports cross-platform operation across Windows and macOS.
  • Can be used for single-user or multi-user applications.

Best For

  • Developing custom business applications with 4D.
  • Storing structured data in a relational format.
  • Creating cross-platform database solutions.

Less Ideal For

  • General-purpose data interchange between different systems.
  • Storing simple, unstructured text documents.
  • Web-based data storage or cloud synchronization.
  • Archiving or compressing large datasets for backup.

Common Use Cases

  • Storing customer information for a business.
  • Managing inventory for a retail store.
  • Tracking project progress in a development environment.
  • Building custom business applications.

How to Open It

  1. The primary method to open and work with .4db files is by using the 4D development environment or its runtime applications.
  2. If you have a .4db file from a 4D application, you will need the corresponding 4D application or a licensed runtime to access its contents.
  3. For developers, the 4D IDE allows full access to create, modify, and query the database stored within the .4db file.
  4. End-users typically interact with the data through the user interface provided by the 4D application, not by directly opening the .4db file itself.

What is a .4db file?

The .4db file extension is primarily associated with 4D, a powerful cross-platform database management system. These files contain the entire structure and data of a 4D database, acting as the core component for applications built with this software. They are designed to store relational data, manage user access, and facilitate complex queries. Because they are proprietary to the 4D ecosystem, they are typically only accessible and manageable through 4D's own development tools and runtime environments. Opening or manipulating these files outside of 4D requires specialized knowledge and software.

Programs That Open .4db Files

PlatformProgram
Windows4DPaidOfficial
macOS4DPaidOfficial

How to Convert .4db Files

FormatMethod
.CSV4D Export Feature, Custom Scripts
.SQL DUMP4D Export Feature, Custom Scripts

Common Problems with .4db Files

⚠️ Cannot open .4db file directly.
You need the 4D application or runtime to access the database. These files are not meant to be opened with generic software.
⚠️ Data corruption or file damage.
Ensure regular backups of your .4db files. If corruption occurs, attempt to restore from a backup or use 4D's built-in maintenance tools.

Frequently Asked Questions

What is 4D?

4D is a cross-platform database management system and development environment used to create custom business applications.

Can I open a .4db file in Microsoft Access or FileMaker Pro?

No, .4db files are proprietary to 4D and cannot be opened directly by other database software. You may be able to export data from 4D to a compatible format like CSV first.

Is .4db an open-source format?

No, .4db is a proprietary format developed and owned by 4D SAS.

Technical Details

A .4db file is a binary file that encapsulates the entire data store for a 4D application. This includes tables, fields, indexes, forms, and program code. It's a self-contained database file, meaning all essential information for the application's data management resides within this single file. The internal structure is optimized for 4D's specific operations and is not designed for direct reading or editing by generic text or hex editors.

Did You Know?

The 4D database system has been around since the mid-1980s, making it one of the older integrated database development environments.
While primarily known for desktop applications, 4D also supports web and mobile development from a single codebase.

Security Information

.4db files contain proprietary database information and should be protected with appropriate access controls within the 4D environment to prevent unauthorized access or modification. Ensure you are using legitimate copies of 4D software to avoid security risks.

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