Convert VOB to MP4 — no upload, no disc required

A ripped DVD is really a folder of VOB files, split apart and hard to play anywhere but a DVD player. OpenConvertVideo converts them to one MP4, right in your browser, with nothing uploaded.

Convert VOB to MP4 →
  • No upload wait
  • Nothing leaves your device
  • Free, no account
  • No artificial size limits

Why DVDs come apart into VOB files

Every DVD-Video disc stores its movie inside a VIDEO_TS folder, not as one file but as several: VOB files carrying the MPEG-2 video, audio, and subtitles, alongside .IFO files that describe the disc's menus and chapters. When you rip or copy a DVD, that's the folder you get — built for a DVD player's menu system, not for playing on a phone or importing into an editor.

Picking the right VOB on a multi-file disc

A single movie is usually split into several VOB files of about a gigabyte each, named things like VTS_01_1.VOB, VTS_01_2.VOB, and so on. VTS_01_0.VOB (or another unusually short file) is typically the DVD menu, not the movie — convert that one by mistake and you'll get twenty seconds of a menu screen. The main title is normally the largest title set on the disc, made up of the largest run of numbered VOB files.

OpenConvertVideo can take the VOB files for a title and convert them into a single MP4, so you stop juggling a folder of gigabyte-sized fragments.

MPEG-2 to H.264: why the result is smaller

DVDs use MPEG-2, a compression standard from the early 1990s that needs a lot of data to hold onto quality. H.264 does the same job with meaningfully less data. Converting a VOB to MP4 typically shrinks the file well below its original size, at a quality that looks the same to the eye — useful when you're trying to fit a shelf of home DVDs onto a phone or a NAS.

Built for personal footage

Most VOB files people convert are home movies — a wedding, a school recital, a family trip someone burned to disc twenty years ago. That's exactly the kind of footage you don't want passing through someone else's server. The conversion runs on ffmpeg compiled to WebAssembly, inside your own browser tab — we supply that code, your own computer does the decoding and re-encoding — so the disc's contents never leave your computer. There's also no imposed size limit, which matters for VOB files that often run to several gigabytes per title. That home movie stays 100% private, exactly as it should.

One file instead of a folder of fragments

  • One MP4 per title, instead of a folder of split VOB files.
  • H.264 video in an MP4 container, with AAC audio.
  • Plays on iPhone, Android, Windows, Mac, and smart TVs.
  • Imports cleanly into modern video editors.

Frequently asked questions

What is a VOB file?
VOB (Video Object) is the file format DVD-Video discs use to store the actual movie, inside a folder called VIDEO_TS. It holds MPEG-2 video along with the disc's audio tracks and subtitles. You get VOB files whenever you copy or rip a DVD onto a computer.
Why is a DVD split into multiple VOB files?
DVD authoring splits long titles into roughly one-gigabyte chunks, so a single movie might be VTS_01_1.VOB through VTS_01_5.VOB or more. The very first VOB in a title set is often the menu rather than the film. The main movie is normally the largest title set on the disc, made up of the largest run of numbered VOB files.
How do I convert VOB to MP4?
Select the VOB file (or files) for the title you want, set the output to MP4 (H.264), and convert. It runs in your browser with nothing uploaded, and the result is a single MP4 instead of a folder of disc fragments.
Will the MP4 be smaller than the VOB?
Usually, yes, by a meaningful margin. MPEG-2 is an old, inefficient way to store video compared to H.264, so converting typically shrinks the file well below its DVD size while looking the same to the eye, even before you touch any quality settings.
Is converting a home DVD private?
Yes. The VOB is decoded and re-encoded entirely on your device using WebAssembly ffmpeg. Nothing about a family DVD gets uploaded anywhere, and there's no imposed limit on how large the source file can be, even for a full-length title.

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