Gone But Not Forgotten: 8 File Formats That Tech Giants Put in the Ground
Every file format has a lifespan. Some last decades. Some barely survive a product cycle. And a few — the ones we're talking about today — once ruled the digital world before the companies that built them decided to walk away.
If you've got a box of old CDs, a dusty external hard drive, or a folder of files you haven't touched since 2007, there's a decent chance some of these formats are in there. Here's the story of how they died, why it happened, and what you can actually do with those files now.
1. RealMedia (.rm, .rmvb)
The rise: In the late 1990s and early 2000s, RealNetworks was the internet's video company. Dial-up connections were crawling, and RealMedia's aggressive compression let people actually stream video — choppy, blocky video, but video — over a 56K modem. For a few years, if you wanted to watch anything online, you probably installed RealPlayer.
The fall: RealPlayer became notorious for being one of the most invasive, bloated pieces of software on any PC. It installed toolbars, hijacked default settings, and ran background processes nobody asked for. When broadband arrived and competitors like Windows Media Player and QuickTime offered cleaner experiences, users fled. RealNetworks kept the product alive in various zombie forms, but the format's cultural moment was over by the mid-2000s.
Can you open .rm files today? Yes, actually. VLC Media Player handles RealMedia files without complaint. If you've got old recordings or downloaded video files in this format, VLC is your friend.
2. Flash Video (.flv, .swf)
The rise: For most of the 2000s, Flash was the internet. Animations, games, video players, entire interactive websites — it all ran on Adobe Flash. YouTube launched in 2005 using Flash video. Newgrounds built a generation of web creators on it. Flash was everywhere.
The fall: Apple refused to support Flash on the iPhone in 2007, and Steve Jobs published an open letter in 2010 explaining exactly why — security vulnerabilities, poor performance, battery drain. The web gradually shifted to HTML5 video. Adobe officially killed Flash at the end of 2020 and built in a kill switch that actively blocks Flash content from running.
Can you open .swf files today? It's complicated. Adobe's kill switch broke a lot of archived content. The Internet Archive has preserved thousands of Flash games and animations using an open-source emulator called Ruffle. For personal .swf files, standalone Flash Player projectors (archived versions) still work on air-gapped machines, and Ruffle handles many (though not all) files reasonably well.
3. QuickTime (.mov — the classic format, not the modern container)
The rise: Apple's QuickTime was genuinely ahead of its time when it launched in 1991. It brought video to the Mac desktop in an era when that was remarkable. The .mov format became a staple of professional video production through the 1990s and early 2000s.
The fall: Apple stopped supporting QuickTime for Windows in 2016, and security researchers immediately found critical vulnerabilities in the Windows version that Apple had no intention of patching. The US Department of Homeland Security literally recommended that Windows users uninstall it. Apple continues developing QuickTime on macOS, but the Windows version is dead and buried.
Can you open old .mov files today? Modern .mov files are fine — the container format lives on. Older QuickTime-specific codecs from the 1990s are trickier. VLC handles most of them, but truly ancient files encoded with legacy Apple codecs may require some digging into codec packs or conversion tools like HandBrake.
4. HD DVD (.evo)
The rise: In the mid-2000s, HD DVD and Blu-ray fought one of the most expensive format wars in consumer electronics history. Toshiba backed HD DVD. Sony backed Blu-ray. Studios took sides. Consumers were stuck in the middle.
The fall: Warner Bros. announced exclusive Blu-ray support in January 2008. Within weeks, major retailers dropped HD DVD. Toshiba threw in the towel in February 2008 — one of the fastest collapses of a major consumer format ever. People who had bought HD DVD players and disc libraries were simply out of luck.
Can you play HD DVD content today? Physical discs require HD DVD drives, which are now collector's items. The .evo file format (used for HD DVD content) can be handled by software like VLC or MakeMKV if you can get the content off the disc. Most HD DVD movies were also released on Blu-ray, so finding replacements isn't usually impossible.
5. Windows Media Video (.wmv) — the DRM'd version
The rise: Microsoft pushed WMV hard in the early 2000s as part of its Windows Media ecosystem. With Digital Rights Management (DRM) baked in, studios loved it. It was the format of choice for early digital movie downloads and rental services.
The fall: Microsoft shut down its DRM license servers. This is the part that really stings: DRM-protected WMV files are tied to license keys stored on servers. When Microsoft decommissioned those servers, every legitimately purchased, DRM-locked WMV file became unplayable. Permanently. You paid for the movie. The movie no longer works.
Can you open .wmv files today? Non-DRM WMV files play fine in VLC and most modern media players. DRM-protected ones are gone unless you have a very old machine with a cached license — which almost nobody does.
6. RealAudio (.ra, .ram)
The rise: Before Spotify, before iTunes, before MP3 was mainstream, RealAudio let people stream audio over the internet. It was how millions of Americans listened to live radio online for the first time in the late 1990s.
The fall: MP3 offered better quality with no proprietary player required. Once broadband made streaming less dependent on aggressive compression, RealAudio's core advantage evaporated. It faded quietly alongside RealMedia.
Can you open .ra files today? VLC handles them. You can also convert them to MP3 using FFmpeg if you want something more portable.
7. Lotus 1-2-3 (.wk1, .wk3, .wk4)
The rise: Before Excel, there was Lotus 1-2-3. It was the killer app that sold the IBM PC to the business world in the early 1980s. For nearly a decade, it was the spreadsheet.
The fall: Microsoft Excel gradually overtook it through the late 1980s and 1990s. IBM acquired Lotus in 1995 and kept development limping along until officially discontinuing it in 2013.
Can you open old Lotus files today? LibreOffice Calc can open many Lotus 1-2-3 files. The compatibility isn't perfect on complex spreadsheets, but basic data is usually recoverable. If you're a business sitting on decades-old financial records in this format, LibreOffice is worth trying before calling in a data recovery specialist.
8. Shockwave (.dcr)
The rise: Macromedia Shockwave predated Flash and was used for rich, interactive web content throughout the 1990s — think CD-ROM-style games and interactive museum exhibits ported to the web.
The fall: Flash eventually absorbed most of Shockwave's use cases, and when Adobe killed Flash, Shockwave went with it. Adobe ended Shockwave support in 2019.
Can you open .dcr files today? This is genuinely difficult. The Internet Archive has preserved some Shockwave content, but unlike Flash, there's no widely available open-source emulator. Most Shockwave content is functionally lost unless someone archived it specifically.
The Lesson in All of This
Every one of these formats was, at some point, the safe bet. The mainstream choice. The thing everyone used. And then it wasn't.
The practical takeaway: if you have files in aging proprietary formats — especially anything tied to DRM — convert them now, while tools still exist to do it. The window doesn't stay open forever. VLC and FFmpeg are free, handle an enormous range of formats, and can convert most of what you've got into something that will still open in 2035.
Formats die. Data doesn't have to.
