VOB to WebM Converter

How to Convert VOB to WebM Online

1. Upload Your VOB File: Drag and drop your .vob files (typically pulled from a DVD's VIDEO_TS folder) or click "+ Add Files". Multiple VOBs from the same title can be queued and converted in one batch — useful since DVD-Video splits long titles into 1 GiB VOB segments.
2. Pick Codec and File Compression: WebM defaults to VP9 video with Opus audio — the best modern choice for HTML5 playback. Switch to VP8 under Video Codec for older device compatibility, or AV1 if you want the smallest files (slower encode). Under File Compression, the default Quality Preset is "Very High"; choose Specific file size, Constant Bitrate, Variable Bitrate, or Constant Quality depending on whether you want a predictable file size or predictable visual quality.
3. Resize and Trim (Optional): Use Video resolution to keep the source size, scale by Resolution Percentage, pick a Preset Resolution (480p, 720p, 1080p), or enter a custom Width x Height. The Trim panel lets you keep a Time Range — handy for skipping DVD menus, FBI warnings, and studio logos at the head of VTS_01_1.VOB.
4. Convert and Download: Click Convert. Files process server-side over an encrypted connection — no watermark, no sign-up, and your VOBs are deleted from our servers after processing.

Why Convert VOB to WebM?

VOB is the DVD-Video container (MPEG-2 Program Stream with DVD-specific constraints) — a format frozen in 1996 that ties video to physical disc playback and a 1 GiB-per-file split. WebM is the opposite: a Matroska-based, royalty-free container first introduced in 2010 (by Google, as part of the WebM Project), purpose-built for HTML5 <video> and supported natively in Chrome, Firefox, Edge, and Safari 16+ desktop / 17.4+ iOS (partial VP9 decode in Safari 14–15). Converting VOB to WebM is what you do when DVD content needs to live on the modern web.

• Embed DVD footage directly in HTML5 pages — A .webm plays in a <video> tag with no Flash, no plugin, no third-party player; VOB needs a desktop app like VLC.
• Archive a personal DVD library at 30-60% smaller size — VP9 with two-pass encoding routinely beats DVD's MPEG-2 by 50% at equal perceived quality, since MPEG-2 was the constraint the DVD spec was designed around in the mid-1990s.
• Make old family videos and recorded TV streamable — Camcorder DVDs and DVR-recorded discs are stuck in MPEG-2 land. WebM works in browsers, mobile email previews, and most cloud-drive viewers.
• Cut the IFO/BUP/VOB three-file dance — DVD authoring uses companion .ifo (navigation) and .bup (backup) files. WebM is a single self-contained file.
• Get cleaner audio handling — VOB ships AC-3, DTS, MP2, or LPCM; not every player decodes all four. WebM normalizes the soundtrack to Opus (or Vorbis), which every modern browser plays.
• Avoid licensing costs — WebM's video codecs (VP8/VP9/AV1) and audio codecs (Opus/Vorbis) are open and royalty-free; MPEG-2 still carries patent baggage from its MPEG-LA pool, which is why platforms like YouTube standardized on WebM.

VOB vs WebM — Format Comparison

WebM Codec & Quality Guide

Frequently Asked Questions

Why is my converted WebM smaller than the original VOB?

DVD-Video was specified in the mid-1990s using MPEG-2, which tops out around 9.8 Mbps for the video stream. VP9 (the default codec for WebM here) achieves comparable perceived quality at roughly half the bitrate, so a 4 GB DVD title commonly converts to a 1.5-2 GB WebM with no visible loss. AV1 squeezes it further at the cost of encode time.

Should I pick VP9 or VP8?

Use VP9 unless you specifically need to play the file on a very old Android phone, smart TV, or embedded device. VP9 is the default for a reason: it's roughly 50% more bitrate-efficient than VP8 and has been hardware-decoded on virtually every device shipped since 2014 (Chromecast, modern Android, Apple Silicon, recent Intel/AMD chips). VP8 is the fallback for compatibility with older hardware that predates VP9 silicon.

Do the VOB's subtitle tracks come through?

No — VOB subtitles are VobSub (bitmap images burned to a separate stream), and WebM uses WebVTT (text-based). The two are fundamentally different. You can sidecar a .vtt file alongside the WebM in your HTML5 player, or burn the subtitles into the video before converting using a dedicated subtitle-rip tool. The audio track is converted automatically.

My DVD splits a movie into VTS_01_1.VOB, VTS_01_2.VOB, VTS_01_3.VOB — do I convert each one?

DVD-Video splits a single title into 1 GiB VOB segments for legacy filesystem reasons, but they're meant to be played as one continuous stream. You can upload all the segments of a single title in one batch and either convert them separately, then concatenate with a tool like ffmpeg -f concat, or merge them first. For simplicity, joining the segments with a DVD-aware tool before uploading produces the cleanest single WebM output.

Will AC-3 (Dolby Digital) audio convert properly?

Yes. Our converter transcodes AC-3, DTS, MP2, and LPCM audio tracks to Opus (the WebM default) or Vorbis. Multi-channel surround mixes get downmixed to stereo by default — if you need to preserve a 5.1 layout, switch to a container that supports it natively like MKV or MP4 instead of WebM.

Why does my browser say "no video with supported format" for the output?

Most often this is Safari on a pre-2020 device. Safari only added native WebM playback in version 14.1 (April 2021), and earlier versions of macOS Safari and iOS Safari refuse to play .webm even with VP9 hardware support. For broad Apple-ecosystem compatibility, convert to MP4 with H.264 instead — try the VOB to MP4 tool.

Is there a maximum file size for the upload?

Free accounts can convert files up to a few hundred megabytes per file — comfortably enough for a single VOB segment from the VIDEO_TS folder. For full DVD titles that exceed the free tier or for batch-processing an entire disc's worth of VOBs, see our paid plans. Files are processed in your session and deleted from our servers after the download completes.

Can I trim out the DVD intro and menus first?

Yes. Open the Trim panel in Advanced Options and set a Time Range with start and duration. This is the standard way to skip the FBI warning, studio logos, and previews that DVDs front-load before the feature. If you need finer control (multiple cuts, exact frame-accurate splits), use the dedicated Video Cutter on the WebM after conversion.

How does this compare to ripping with HandBrake or MakeMKV?

HandBrake and MakeMKV are excellent desktop tools, but they require installation, CSS-decryption libraries for encrypted commercial DVDs, and a learning curve for codec settings. This tool works in the browser with no install and uses sensible WebM defaults (VP9 + Opus, Very High quality). For unencrypted personal-recording DVDs and short tasks, this is faster; for bulk-ripping a large commercial DVD library, HandBrake is still the more efficient pipeline.