The .WPD, the .DBF, and the .PST: Free Tools That Open Files Windows Forgot

Last March my accountant emailed me a copy of my completed 1040 in a .wpd file. I double-clicked it. Windows 11 gave me the same look my dog gives a doorbell. No preview, no helpful suggestion, just a file extension that might as well have been ancient Sumerian. That kicked off a week of digging through old WordPerfect documents, a client's DBF database, and a family Outlook archive that had been sitting on an external drive since the Obama administration.

Here is the short version: you do not need a paid converter suite or a sketchy website that makes you upload your tax return to a server in a country you cannot find on a map. You need a few free tools, a copy of the original file, and a little patience.

First rule: never convert the only copy

Before I opened anything, I duplicated every file into a working folder. Dead formats are dead for a reason, and half the tools I tried wanted to save over the original or create a new file with the same name. If something goes sideways, you want the original untouched. This is boring advice, but it is the difference between a bad afternoon and a genuinely bad week.

.WPD: LibreOffice Writer won by not being weird

The .wpd file was a WordPerfect document from my accountant's office. I tried three things: LibreOffice Writer, Microsoft Word, and two online converters that showed up near the top of search results.

LibreOffice Writer opened it cleanly. The tables were mostly intact, the bold text stayed bold, and the numbers lined up. Some fonts shifted, and a couple of paragraph indents moved by a hair, but for reading a tax return it was more than good enough. LibreOffice is free, open source, and available for Windows, macOS, and Linux. It is also the least dramatic tool in this entire article.

Microsoft Word opened the file too, but only after a warning about the format. The layout was close, though margins drifted and one table split across pages in a way that made my refund look like a loss. If you already have Word, fine. It is not a reason to buy Office just for this.

The online converters were a mess. One produced a PDF with a watermark and a footer ad for a VPN. Another opened a page that looked like a download button but was actually an installer for a 'Download Assistant' that wanted to add a browser extension. I closed the tab and ran a scan. No thank you.

.DBF: DBF Viewer Plus was the low-drama pick

The DBF file came from an old contact database a client used in the early 2000s. DBF is a database format, not a document, so I expected trouble. DBF Viewer Plus handled it without installing anything. It is a small portable Windows app, which means you can run it from a folder and skip the installer entirely. It opened the table, let me search and filter, and exported to CSV without mangling the field names.

LibreOffice Calc also opened the DBF, but it treated several date fields as plain text and turned one numeric column into something that looked like scientific notation. For reading, that is fine. For editing, I would not trust it without checking every column.

I also tried a trial version of a commercial DBF manager. It opened the file, then reminded me every few minutes that my trial was running out. I uninstalled it. Free and portable beat free and nagging.

.PST: MailStore Home for the family mail archive

The PST file was the big one: about 1.8 GB of old Outlook mail from my parents' old PC. Microsoft Outlook can open PST files, but Outlook is not free. I did not want to install a mail client just to read old messages.

MailStore Home is free for personal use and imported the PST without complaint. It indexed the messages, let me search by sender and date, and exported individual messages or whole folders to EML files. The interface looks a little dated, but it worked. If you need to rescue old mail and do not want to pay for Outlook, this is the tool I would start with.

For batch work, I also used readpst, which is part of the open-source libpst package. It is a command-line tool, so it is not for everyone, but it converted the PST into mbox files that I could open in Thunderbird. If you are comfortable with a terminal, it is fast and free. If you are not, MailStore Home is the friendlier path.

The converter-site trap

Most of the dangerous stuff I ran into was not in the file formats. It was in the websites that promise to convert anything for free. The pattern is predictable: a big upload button, a countdown timer, a fake 'Download' button that is actually an ad, and an installer that bundles a toolbar or changes your browser search engine.

A few rules I now follow:

• Do not upload tax returns, medical records, or client databases to a random online converter. Use an offline tool when you can.
• Prefer open-source or well-known publishers. LibreOffice and MailStore Home are not mysterious.
• If you download an installer, choose the custom install option and uncheck everything that looks like a bonus.
• Run the installer through VirusTotal if you are not sure. It takes a minute and can save you an hour of cleanup.
• Test on a copy, not the original. This applies to every tool in this article.

What I would install again

If you are staring at a dead file format right now, here is the short list I actually kept on my PC: LibreOffice for WPD and other office documents, DBF Viewer Plus for database files, MailStore Home and readpst for PST archives, Thunderbird for reading exported mail, HxD for peeking at file headers when a file is mislabeled, and 7-Zip for checking whether a mystery file is really a compressed archive. That is seven free tools, and none of them asked for my credit card or tried to install a shopping toolbar.

The tax return opened. The database exported. The old mail is searchable again. None of it was elegant, but it was free and it did not require trusting a website that looked like it was designed in 2004. That is a win in my book.