Are my files uploaded to a server?

No. This conversion runs inside your browser using your own device’s processing power, and the file is not uploaded. Once a tool has been used once (video, text recognition and background removal download their engine from this site the first time), it keeps working when your connection drops.

Why are my DVD files split into several VOBs?

The DVD format caps each file at 1 GB, so a feature is spread across numbered segments. Joining them restores one continuous video.

How large a DVD can I convert?

Conversion runs in your browser, and the files are read from disk as they go rather than loaded into memory. What has to fit is the finished file: the result comes back as one file as long as this device can hold it — about 1.5 GB on a computer, 400 MB on a device that reports 4 GB of memory or less. A bigger result is delivered as parts, each a complete video; no browser can build a single file much over 1.5 GB.

Convert VOB (DVD) to MP4

Runs on your device · Your file never leaves your device.

DVDs store video as VOB files that most players and phones will not open, and a single film is usually split across VTS_01_1.VOB, VTS_01_2.VOB and so on. Add them all and they are detected as one set, sorted correctly, and joined into a single MP4.

Sorting matters more than it sounds: a plain alphabetical sort puts segment 10 straight after segment 1, which silently scrambles the film. These are ordered numerically. VIDEO_TS.VOB and the VTS_xx_0.VOB files are DVD menus rather than the feature, so they are left out, and if the files of two titles are added together, the bigger title is joined.

MP4 cannot carry a DVD’s MPEG-2 picture as it is, so for an MP4 every segment is encoded as H.264 with AAC sound. Choose MKV instead and segments that match are copied as they are — fast, with no quality loss at all. You are told which is happening before it starts.

How to convert VOB (DVD) to MP4

Add the VOB files from the VIDEO_TS folder of your DVD rip.
If a title was split across several VOBs, add them all — they are detected and joined in order into one continuous video.
Keep MP4 for an H.264 file that plays almost anywhere, or choose MKV to copy the DVD’s own picture and sound without any loss.
Press Join and download the result.

Supported formats and limits

Input: VOB files from a DVD’s VIDEO_TS folder
Output: MP4 (H.264 + AAC), or MKV with the original streams
Segments: Split titles are detected and rejoined into one video
Audio: Every sound track kept, when all segments carry the same tracks
Where it runs: In your browser; the disc footage is never uploaded

Not for: Copy-protected commercial discs — this converts files you already have, it does not remove DVD encryption.

Which files to add from VIDEO_TS

Add the VOB files of the film. VIDEO_TS.VOB and every VTS_xx_0.VOB are DVD menus and are always left out. If the files of two titles are added together, the title with the most data, usually the film, is joined, and the summary names the files of the other title so they can be added on their own afterwards. Segments are ordered by number, so VTS_01_10 follows VTS_01_9, and a gap in the numbering is pointed out. A single VOB on its own is not joined but converted straight to an H.264 MP4.

MP4 or MKV

MP4, the starting choice here, is encoded: MP4 cannot carry a DVD’s MPEG-2 picture cleanly, so each segment is encoded as H.264 with AAC sound, one at a time, and the results are then joined without further loss. The frame keeps the picture’s shape as shown: a widescreen NTSC DVD stored as 720×480 comes out as 854×480 with square pixels, not squeezed. Every sound track is kept when all segments carry the same tracks, each as stereo AAC at 48 kHz.

MKV copies the DVD’s own MPEG-2 picture and every sound track as they are, with nothing re-encoded. DVD authoring leaves the timestamp off most video packets; the join fills in the missing ones from the order of the frames, which a lossless copy needs. Force re-encoding turns an MKV join into the H.264 encode above, kept in MKV.

A whole disc

The files are read from disk as they go; what has to fit in memory is the finished file. One file is built when the result fits what this device can hold: about 1.5 GB on a computer, or 400 MB on a device that reports 4 GB of memory or less. A bigger MKV join is delivered as parts made of whole segments, so each seam falls where the disc already had one, and every part is a complete video.

No browser can build a single file much over 1.5 GB, so a full DVD title copied losslessly normally stays in parts. For the whole film in one file, keep MP4: its H.264 picture is usually far smaller than the disc’s MPEG-2.

Frequently asked questions

Are my files uploaded to a server?: No. This conversion runs inside your browser using your own device’s processing power, and the file is not uploaded. Once a tool has been used once (video, text recognition and background removal download their engine from this site the first time), it keeps working when your connection drops.
Why are my DVD files split into several VOBs?: The DVD format caps each file at 1 GB, so a feature is spread across numbered segments. Joining them restores one continuous video.
How large a DVD can I convert?: Conversion runs in your browser, and the files are read from disk as they go rather than loaded into memory. What has to fit is the finished file: the result comes back as one file as long as this device can hold it — about 1.5 GB on a computer, 400 MB on a device that reports 4 GB of memory or less. A bigger result is delivered as parts, each a complete video; no browser can build a single file much over 1.5 GB.