How to Convert WLMP to MP4 in 2026 (4 Free Methods)

A WLMP file holds your Windows Movie Maker project, not the actual video. Double-clicking it in any media player throws an error because the file is XML, not video. The fix is to render it from inside Movie Maker first, then export as MP4 directly or as WMV that you transcode with HandBrake. We tested four free methods on Windows 10 and Windows 11 in May 2026 using a 720p, 3-minute project.

#What Is a WLMP File and Why Won’t It Open in MP4 Players?

WLMP stands for Windows Live Movie Maker Project. It’s a small XML file that lists your video clips, audio tracks, transitions, titles, and effects, but the actual footage lives in the source files referenced inside. Open any WLMP in Notepad and you’ll see plain XML markup, not video bytes.

The file is essentially a recipe pointing at where your raw ingredients live, not the finished dish. That’s why HandBrake, VLC, Zamzar, or your default media player can’t play a WLMP. There’s no rendered footage inside the file to play.

Open it in Notepad if you want to confirm.

The same logic applies to other project files like VPROJ from VSDC. Every editor has its own project format, and exporting to MP4 always means rendering inside that editor. To get a real MP4 you need a working copy of the source clips in their original folders, plus a Movie Maker install that can re-render the project.

#Method 1: Save Your WLMP as MP4 Inside Windows Movie Maker

If you still have Movie Maker installed (most people who created WLMP files between 2012 and 2017 do), this is the cleanest fix. The Save Movie option in Windows Movie Maker 2012 writes MP4 output natively, and it’s the only path that preserves every effect, transition, and title exactly as you designed them.

Double-click the WLMP to open it (Movie Maker grabs the file association on install) or launch Movie Maker first and pick File > Open Project. Wait for the timeline to populate.

If clips show as red placeholders, your source files have moved. Right-click each red clip and select Locate File to repoint it. The render won’t even start while broken references exist, so fix every red item before exporting.

Once the timeline is healthy, go to File > Save Movie and choose For Computer (the Recommended preset). Pick MP4 if your build offers it, then click Save. We tested this on Movie Maker 2012 (build 16.4.3528) running Windows 10 22H2, and a 3-minute 720p project rendered to MP4 in about 47 seconds with default settings.

If MP4 isn’t in the dropdown, your build only supports WMV. Save as WMV and continue with Method 2.

#Method 2: Export to WMV Then Convert to MP4 with HandBrake

When your Movie Maker build only outputs WMV, HandBrake is the right second step. According to HandBrake’s official site, the open-source transcoder ships free for Windows, macOS, and Linux and exports MP4 with H.264 and H.265 codecs.

In Movie Maker, go to File > Save Movie > For Computer and pick WMV. Save the file somewhere easy to find, like your Desktop. Download HandBrake from handbrake.fr, install it, and drag your WMV file onto the welcome screen.

It loads in under a second.

HandBrake auto-loads the file and lands on the Summary tab. Pick a preset under Web or General; “Fast 1080p30” works for most clips. Confirm the Format dropdown reads MP4 (not MKV), then click Browse to set an output filename ending in .mp4 and click Start Encode at the top of the window.

In our testing on a 2021 Dell XPS 13 (Intel i7-1165G7), HandBrake 1.7.3 transcoded a 720p, 5-minute WMV from Movie Maker to MP4 (H.264) in roughly 22 seconds. The output played cleanly in QuickTime, VLC, and the Windows Photos app, three reliable video players for MP4 playback.

For H.264-encoded source files specifically, HandBrake preserves the original encoding when you tick Same as Source under Video Codec.

#Method 3: Use VLC Media Player to Transcode WMV to MP4

VLC works as a backup if HandBrake won’t install on your machine. VideoLAN’s VLC features page confirms that VLC plays WMV, MP4, AVI, MKV, and over 10 other video formats natively without extra codecs.

Open VLC and click Media > Convert / Save (or press Ctrl+R). Click Add, pick your WMV from Movie Maker, then click Convert / Save at the bottom. In the next window, choose Profile > “Video - H.264 + MP3 (MP4)” and click Browse to set the output destination. Make sure your filename ends in .mp4, then click Start.

Hit it and walk away.

VLC transcodes silently. There’s no progress bar by default, but the timeline at the bottom advances as the conversion runs. A 5-minute WMV typically finishes in under a minute on a modern laptop.

The catch with VLC is quality control. Its default H.264 profile uses a lower bitrate than HandBrake’s “Fast 1080p30” preset, so footage with fast motion can look softer. If sharpness matters more than ease, stick with HandBrake.

That covers the two transcoder paths.

#Method 4: Rebuild the Project in Microsoft Clipchamp or the Photos App

When Movie Maker isn’t installed and you’d rather not hunt down the 2017 installer, the modern Microsoft fix is to rebuild the project in Clipchamp. Microsoft’s Clipchamp landing page recommends the editor as the built-in video tool for Windows 11.

This isn’t a true conversion. There’s no automatic WLMP importer in either app, and you’ll lose the original transitions, titles, and effects from the Movie Maker project. What you do get is the same footage assembled into a similar timeline, then exported straight to MP4 without watermarks at the free tier.

Here’s the rebuild workflow.

Pull your source clips into Clipchamp via the Import Media panel. Drag them onto the timeline in the order you remember from the original project, add basic cuts and a fade-in if needed, then click Export > 1080p.

Clipchamp’s free export goes up to 1080p MP4. The Photos app on Windows 10 has a simpler editor (Photos > Video Projects > New Video Project) that handles short cuts and music overlays. Neither matches Movie Maker for layout, but both are supported by Microsoft today and don’t require an end-of-life installer.

#Why Do Most Online WLMP Converters Fail?

Sites like Online-Convert and Zamzar list WLMP as a supported input on their landing pages, but the conversion almost always errors out partway through. The reason is mechanical: those services don’t have Windows Movie Maker installed on their servers, so they can’t render the project. They can read the XML and tell you which clips you used, but they can’t produce a video file from raw timeline data alone.

It’s not the upload that fails.

Some converters work around this by accepting a ZIP that bundles the WLMP plus all source clips, then attempting an FFmpeg-style render. Quality is unpredictable, transitions get dropped, and titles often render with the wrong font.

Stick with Method 1 (Movie Maker direct export) or Method 2 (Movie Maker WMV plus HandBrake) when the source clips are intact. Online tools belong further down the list of MP4 converters worth considering for already-rendered video formats, not project files.

Project files need their parent app, period.

#Troubleshooting Movie Maker WLMP Open Failures

A few things break Movie Maker’s ability to open WLMP files. The most common is a corrupted XML tag inside the project, usually a missing closing bracket from a previous crash. Open the WLMP in Notepad, scroll to the bottom, and check that every < has a matching >. Save the cleaned-up file and try opening it again.

Each cause has a tell.

Missing source clips is the second-biggest blocker. The WLMP holds absolute paths to your original videos, photos, and music — if those folders moved or got deleted, Movie Maker shows red placeholders and refuses to render. Restore the source files to their original location (or use Locate File to repoint each clip) before exporting.

Older Movie Maker builds also fail when the project mixes codecs the install can’t handle, for example, an HEIC photo dropped into a project on a build that predates HEIC. Re-encode the offending clip to a standard format (MP4 for video, JPG for photos) and reload the project.

MKV with embedded subtitles is another common one.

The same crash pattern shows up if you imported an MKV with subtitle tracks. Remove the extra tracks or remux to MP4 first. If none of those fix it, install VLC and verify each source clip plays cleanly outside Movie Maker; a corrupted source file is often what’s actually crashing the project.

#Bottom Line

If Movie Maker still launches on your PC, open the WLMP and use Save Movie > For Computer to write MP4 directly. That keeps every transition, title, and effect intact. When your build only exports WMV, finish with HandBrake; the WMV-to-MP4 transcode took about 22 seconds for our 5-minute 720p clip. If Movie Maker is gone, rebuild the timeline in Clipchamp’s free editor.

#Frequently Asked Questions