Click the "Select File" button above, and choose your DT5 file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert DT5 to another file type
To convert DT5 Data files to another format, you need Brother's Keeper or other Database software.
Convert a file to DT5
To convert other file formats to the "Genealogy & Exam Data" file type, you need software like Brother's Keeper or a similar tool.
About DT5 files
A .dt5 file is primarily a legacy genealogy database created by Brother's Keeper (specifically version 5.x). These files serve as the backbone for storing family tree structures, including names, dates, relationships, and multimedia references. A secondary, less common use is as a session data file for TestOut (LabSim), storing progress for IT certification exams.
The Problem: Proprietary Lock-In
The main challenge with .dt5 files is that they are proprietary binary databases. You cannot open them in standard tools like Microsoft Excel, Notepad, or Google Sheets. Furthermore, for Brother's Keeper files, a single .dt5 file is often just one segment of a multi-file relational database (usually paired with .IX5 index files). Without the accompanying index files or the original software engine, the data is effectively scrambled and unreadable.
The Solution: Exporting for Compatibility
For Genealogy: The only reliable way to convert this data is to use Brother's Keeper 5 (or upgrade to version 6/7 which imports it). Once opened, you should immediately export the family tree to a GEDCOM (GED) file. GEDCOM is the universal standard accepted by Ancestry.com and MyHeritage.
For Archiving: If you need a visual record, use the software's 'Report' feature to print charts to PDF.
For TestOut: These files are generally strictly for internal use by the TestOut platform and typically cannot be converted for external use.
Convert.Guru analyzes your DT5 file, detects the exact format, and lets you read the text inside.
If you want to convert DT5 file to CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT, DB or SQL, you can use Brother's Keeper or similar software from the "Genealogy Database" category. In the File menu, look for Save As… or Export….
To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to DT5, try Brother's Keeper or another comparable tool in the "Genealogy Database" category.
The DT5 Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our DT5 converter.