TS to WebM Converter

How to Convert TS to WebM Online

1. Upload Your TS File: Drag and drop your .ts transport stream, or click "+ Add Files" to select one or more clips. Batch conversion is supported — recordings from a DVR, IPTV capture, or camcorder can be queued together.
2. Pick Quality Preset and Codec: The default is VP9 video + Opus audio at the "Very High (Recommended)" preset, which is the standard WebM pairing browsers expect. Switch to VP8 if you need older-Android playback, or pick AV1 for ~30% smaller files at the cost of slower encoding.
3. Set Resolution and Trim (Optional): Choose a Preset Resolution (1080p, 720p, 480p), scale by Resolution Percentage, enter custom Width x Height, or keep the source dimensions. Use the Trim → Time Range controls to cut to a start/duration if you only need part of the broadcast capture.
4. Convert and Download: Click Convert. Files are processed on our servers over an encrypted connection and deleted after a short window — no sign-up, no watermark, no ads injected into the output.

Why Convert TS to WebM?

TS (MPEG-2 Transport Stream) is the container broadcasters, IPTV boxes, and many DVRs/camcorders write to disk. It is designed for packet-loss-resilient transmission at 188-byte packets, not for the web — most browsers will not play a .ts file natively, and even when they do, the file is usually much larger than it needs to be because it carries MPEG-2 or H.264 payloads at broadcast bitrates. WebM, introduced by Google in 2010 and built on the Matroska container with VP8, VP9, or AV1 video and Opus or Vorbis audio, is the format the open web was designed around.

• HTML5 video embeds — A <video> tag pointing at a .webm file plays in Chrome, Firefox, Edge, and Safari 14.1+ without a plugin. TS in <video> is a non-starter outside of HLS streaming.
• Smaller files for the same quality — VP9 typically achieves 30-50% better compression than the VP8/H.264 payload in a broadcast TS at the same visual quality, useful when uploading to a site with a per-asset size cap.
• Royalty-free distribution — WebM's codecs are open and royalty-free, which matters for commercial sites and apps that would otherwise need an H.264/H.265 license for the TS payload.
• WhatsApp, Discord, and Slack uploads — These platforms recognize WebM but reject or mis-thumbnail raw .ts captures. Discord's free tier caps uploads at 10 MB (raised to 500 MB on Nitro); a 1-minute 1080p clip easily fits as WebM but rarely as TS.
• OBS / screen-recorder output cleanup — OBS can be configured to write .ts for crash resilience; converting to WebM after the session gives you a clean, seekable, web-ready file without re-recording.
• Archive of IPTV / DVB recordings — Long broadcast captures shrink dramatically when re-encoded with VP9 at a sane bitrate, and the WebM result is easier to scrub through in modern players than the original transport stream.

TS vs WebM — Format Comparison

WebM Codec Quick Guide

Frequently Asked Questions

Why won't my browser play the TS file directly?

The HTML5 <video> element does not include MPEG-2 Transport Stream as a supported container in any major browser. TS is only consumed by browsers indirectly through HLS via Media Source Extensions, where the player JavaScript pulls down small .ts segments and demuxes them. A raw .ts file sitting on a static URL will either download as a binary or fail to play. Converting to WebM (or MP4) is the fix.

Should I pick VP9 or AV1?

VP9 is the safe default in 2026 — it is hardware-decoded on essentially every Chromebook, modern Android, smart TV, and recent Apple device, and it gives a 30-50% size reduction versus the H.264 payload most TS files carry. AV1 gives another 30% reduction on top of VP9 but encodes much more slowly and only hardware-decodes on Android 10+ and Apple silicon Macs / iPhones from the iPhone 15 Pro generation onward. Pick AV1 only if filesize matters more than encode time and your viewers are on recent hardware.

Will the audio survive — my TS has AC-3 5.1?

WebM does not support AC-3. The audio will be transcoded to Opus (the default) or Vorbis. Opus handles up to 255 channels in spec but most players downmix surround tracks to stereo at standard bitrates; if you need to preserve 5.1, an MKV or MP4 container is the better target since both can carry the original AC-3 stream untouched.

My TS is from an IPTV DVR — does it have multiple programs?

Often yes. Broadcast TS can multiplex several "programs" (channels) into one stream. Our converter picks the first video + first audio program by default, which is what 99% of single-channel DVR captures contain. If your file is a multi-program transport stream (MPTS) and you need a specific channel, demux it with FFmpeg first (ffmpeg -i input.ts -map 0:p:N out.ts where N is the program ID) before uploading.

Why is my WebM larger than the source TS?

Two common reasons: (1) you picked VP8, which is less efficient than the H.264 payload inside many TS files — try VP9 instead. (2) The Quality Preset is at "Very High" while the source was already low-bitrate (under 2 Mbps for 720p); a higher preset forces the encoder to use more bits than the source has. Drop to "High" or set a Specific File Size / Constant Bitrate target.

Can I convert just a clip — the broadcast is 2 hours and I only need 30 seconds?

Yes. Expand Advanced Options, open the Trim group, switch from "Unchanged" to "Time Range", and enter a start time and duration. The encoder will only process the selected window, which also means a much faster conversion than transcoding the full file.

Does this work for files captured by OBS in MPEG-TS mode?

Yes. OBS's MPEG-TS recording mode is one of the most common sources we see. The capture is usually H.264 + AAC inside the TS wrapper; transcoding to VP9 + Opus produces a clean WebM ready for upload to a site or for re-editing in a tool that prefers Matroska-family containers.

Need MP4 instead, or want the reverse direction?

If your target is iOS/iMessage or a video editor that struggles with VP9, use TS to MP4 — MP4 with H.264 has wider device support outside the browser. For the reverse trip (WebM back to a TS-style broadcast stream is uncommon, but you can target MP4 from WebM via WebM to MP4), or shrink the source first with our TS Compressor before converting.