All about QDB Files

The QDB file type is primarily associated with SQLite.

QDB	File extension: QDB
	File type:	database container

What is a QDB file?

QDB files mostly belong to SQLite. QDB files are database files that hold structured data for different applications.
Some QDB files use a basic SQL structure, similar to a SQLite database file. You can open these with tools like an SQLite browser. For more details, visit SQLite.
Other QDB files are created by specific companies. For example:

Qualcomm database: Used in systems linked to Qualcomm and sometimes referred to as a Quicken data file by related tools.

Q-Sys / Qbus Database: Employ the JetDB format and relate to data storage similar to a Microsoft Access file.

ModelSim debug database: Contain simulation and debug information for electronic design tools. More info can be found at Siemens EDA.

Revolution Games question database: Store question and answer data used by quiz or game programs.

Each QDB file is built for its source software and may need that program or a dedicated viewer to open it properly.
FilExt.com note: When you inspect a QDB file with a text or hex editor, you might see markers (such as SQL commands) that reveal its underlying structure. This information tells you which tool to use for viewing or editing the file.

How to open a QDB file

You need a suitable software like SQLite to open a QDB file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your QDB file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a QDB file directly in the browser:. Just drag the file onto this browser window and drop it.

Online QDB Text Viewer

Choose your .qdb file to analyze

or drag and drop it here

Online File Viewer

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QDB format details:

The file format determines how the data is stored in the file. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Below is our analysis of the QDB files:

The QDB file type is used by a few programs, each with its own file format. But the following two file formats are common:

• 25% of all QDB files are based on the popular SQL file format. An SQL file contains a lightweight SQLite database, widely used in application development for storing application related data. These files contain neither text nor words, but only data. QDB files are between 12 KB and 25 MB in size. The file type was primarily used more than 10 years ago. Certain words are almost always found in the files, such as SQLite format 3. Some examples of file names are Messages.qdb or Owner.qdb. Files like these are sometimes connected to application.
• 20% of all QDB files have the same signature 7F 51 44 42. If you open these files in a text editor, you will see only illegible characters. QDB files can be up to 6 MB in size, but are often around 5 MB - 6 MB. Examples of file names are qdsp6m.qdb.

The remaining 55% of all QDB files are files with no common format, the following 6 formats can be found: JetDB, Modelsim and depot. Sometimes used for data, terapia, qdata or sbbm. You can get all the details of your QDB file by dragging it onto this page or by clicking the button "Choose your .qdb file to analyze" above.