VOB to MP4 Converter — Convert DVD Videos Online Free
Convert DVD VOB video files to MP4 format directly in your browser. Free, fast, and private converter — no server upload. Powered by FFmpeg WebAssembly.
Drag & drop or click to upload
Supports .vob (DVD Video Object)
Result
Upload a VOB file and hit convert to generate your MP4.
DVD VOB → Modern MP4
DVD VOB files are stuck in the past. Convert them to H.264 MP4 — the universal video format that plays on every phone, tablet, laptop, and smart TV. All processing happens in your browser with zero uploads.
Key Features
Universal Playback
MP4 (H.264) plays on every modern device — phones, tablets, browsers, and smart TVs.
100% Private
All conversion happens locally via FFmpeg WebAssembly. Your video files never leave your device.
Smaller Files
H.264 encoding compresses VOB/MPEG-2 video significantly while maintaining excellent quality.
Web-Optimized
Output includes faststart flag for instant web streaming without full download.
How this VOB to MP4 Converter — Convert DVD Videos Online Free works
This video converter transforms DVD VOB (Video Object) files into modern MP4 format using FFmpeg WebAssembly running entirely within the browser. VOB is the container format used on DVD-Video discs, typically wrapping MPEG-2 video, AC-3 (Dolby Digital) or DTS audio, DVD subtitles (bitmap-based), and IFO-referenced navigation data. VOB files follow the MPEG program stream specification and are designed exclusively for DVD player hardware.
The converter loads FFmpeg's WebAssembly core (~31 MB) from a CDN, writes the uploaded VOB file to the virtual filesystem, then executes H.264 re-encoding using the libx264 encoder with the 'fast' preset and CRF 23 — a rate-control mode that targets consistent visual quality (lower CRF = higher quality, 23 is the default "visually lossless" setting). Audio is re-encoded to AAC at 192 kbps for broad compatibility. The -movflags +faststart flag repositions the MP4's moov atom to the beginning of the file, enabling progressive web playback without requiring a full download.
H.264 encoding achieves significantly better compression than the original DVD's MPEG-2 codec — typical VOB files compress 50–70% smaller at equivalent visual quality. FFmpeg's progress callback drives the real-time percentage bar. The resulting MP4 plays natively on every modern device: smartphones, tablets, browsers, smart TVs, and media players. All processing happens locally in the browser — DVD content never leaves the user's device.
How to use this VOB to MP4 Converter — Convert DVD Videos Online Free
Upload VOB file
Drag and drop or click to select a VOB video file from your DVD rip.
Convert
FFmpeg WebAssembly re-encodes the video to H.264/AAC MP4 in your browser.
Download MP4
Download your universally compatible MP4 file ready for any device.
Example Usage
A DVD video chapter converted to modern MP4 format for playback on any device.
Frequently Asked Questions
What is a VOB file?
Why convert VOB to MP4?
Will the video quality be affected?
How long does conversion take?
Is my video uploaded to a server?
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The VOB to MP4 Converter — Convert DVD Videos Online Free is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.

