In a DataPerfect database, the .STR file is the structure file. It describes the panels (tables), their fields, and which data file holds each panel’s records. Point Legacy File Converter at the .STR file; it reads the panel data files that sit next to it in the same folder.

A .NB file from WordPerfect Office is a WordPerfect Notebook: a simple list of records with named fields, often used for addresses and mailing lists. Legacy File Converter reads Notebook 3.1 files and text-form secondary merge files. Mathematica also uses the .nb extension; those files are skipped with a clear message.

Which output should I choose?

XLSX if people will open the data in Excel: each table gets its own sheet. CSV if another program needs a plain import file: one CSV per table. SQLite if you want one portable database file with real tables that you can query.

Do I need DataPerfect or WordPerfect installed?

No. The files are read directly on your PC. Nothing is uploaded, and no DOS emulator or old WordPerfect install is required.

Databases5 min read

Convert DataPerfect Databases and WordPerfect Notebook Files on Windows

Legacy File Converter now opens DataPerfect (.STR) and WordPerfect Notebook (.NB) files and writes Excel, CSV, or SQLite. dBase (.DBF) joins them under Databases.

October 28, 2026·By the Legacy File Converter team

Old database records turning into a modern spreadsheet and database table on a Windows PC

TL;DR

Legacy File Converter now converts DataPerfect databases (.STR) and WordPerfect Notebook files (.NB) to XLSX, CSV, or SQLite. dBase (.DBF) moves into the same Databases group. Drop a folder in; Smart sends each database to the format you pick. Everything runs on your Windows PC.

File extensions this covers

.STR: DataPerfect database structure file. The panel data files next to it are read automatically; you do not add them yourself.
.NB: WordPerfect Notebook (Notebook 3.1, plus text-form secondary merge files that use {END FIELD} and {END RECORD}).
.DBF: dBase, FoxPro, and Clipper tables.

If you found an old drive full of these and could not tell what they were, this is the short answer: they are databases from WordPerfect Office and the DOS era, and they can still be opened.

Three ways out

XLSX: one workbook. Each DataPerfect panel gets its own sheet. Best when people will open the data in Excel.
CSV: one plain file per table. Best when another program needs an import file. A database with several panels becomes a folder of CSV files.
SQLite: one database file with a table for each panel. Best when you want to keep the data as real tables and query it.

How to convert them

Add the files or a folder

Drag in .STR, .NB, or .DBF files, or a whole folder. Mixed folders are fine: documents, spreadsheets, and images go to their own formats in the same run.

Pick the database format

With Smart selected, set Databases convert to to XLSX, CSV, or SQLite. XLSX is the default.

Convert

The output plan shows how many database files will be written and in which format. Converted files are saved where you choose and appear in Conversion Library.

Spreadsheets can go to SQLite too

The Spreadsheets row in Smart now includes SQLite. Lotus 1-2-3, Quattro Pro, and Excel files can be written as a SQLite database with one table per sheet.

Why convert locally

Old databases often hold client lists, case records, and member rolls. Converting on your own PC means none of it is uploaded to an online converter. The same installer handles WordPerfect documents, Lotus and Quattro Pro spreadsheets, images, and media, so a whole archive drive can be done in one pass.

Ready to open your old files?

Start free, then unlock unlimited conversions with a one-time $79.95 Standard license. Download the Windows installer — full features for up to 10 files.

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