Convert MP4 to TS Free Online
Convert MP4 to MPEG-TS (.ts) for free in your browser. Lossless FFmpeg.wasm stream copy with no upload. Your files stay on your device.
MP4 and TS are containers. They wrap video, audio, timing, and metadata so different tools know how to read your file.
This converter does not promise a new codec or a smaller file. It asks FFmpeg.wasm to copy compatible streams into a Transport Stream container, which is the format you often see in broadcast delivery, IPTV, and classic HLS .ts segments.
If your MP4 already uses common streams such as H.264 video with AAC audio, the result can be created without decoding and re-encoding. That means your picture and sound are copied, not recompressed.
Choose TS when your next tool expects MPEG-TS, not when you simply want the most convenient everyday video file. A .ts file is useful when you are preparing media for streaming infrastructure, broadcast-oriented software, or a workflow that later builds an HLS playlist.
A plain MP4 is still usually better for phone galleries, casual sharing, and direct downloads. MP4 has broad playback support and usually carries metadata more neatly for consumer apps.
If you are building HLS, remember that a single .ts file is not the whole stream. HLS normally needs a playlist file and segment rules, while this converter gives you the TS container output you can use as part of that pipeline.
Stream copy is strict because it does not repair or reinterpret your media by re-encoding it. If the TS muxer cannot accept one of your streams, FFmpeg stops instead of silently creating a misleading file.
The common gotcha is that the file extension does not tell the whole story. Your .mp4 might contain H.264 and AAC, or it might contain another video codec, unusual audio, captions, timecode, rotation metadata, or extra tracks that do not map cleanly to MPEG-TS.
If your conversion fails, try converting your source to a standard H.264 and AAC MP4 first, then run MP4 to TS again. That adds an encode step, but it gives the TS muxer streams it can usually carry.
Can you convert MP4 to TS without uploading?
Yes. GrepCut runs FFmpeg.wasm locally in your browser, so your MP4 stays on your device instead of being uploaded to a server.
Is MP4 to TS lossless?
Yes, when stream copy succeeds. The converter uses FFmpeg-style stream copy, so compatible video and audio packets are copied into the TS container without a new encode.
Why is your TS file larger than the MP4?
That can be normal. MPEG-TS is designed for transport and adds packet overhead, so a lossless remux can still produce a larger file even when the video and audio quality are unchanged.
Will this make an HLS playlist?
No. This converter gives you a .ts file. A complete HLS output usually needs an .m3u8 playlist plus segment settings, so use this TS file as a pipeline piece rather than a full HLS package.
Why did your MP4 to TS conversion fail?
Your MP4 may contain streams that MPEG-TS cannot copy as-is. Try a standard H.264 and AAC MP4 source, or transcode your file first and then remux it to TS.
Can you use TS for IPTV?
Yes, if your IPTV tool accepts MPEG-TS and your streams are compatible. TS is common in IPTV and broadcast workflows, but the exact requirements depend on your server, playlist, and playback device.
Will captions, rotation, or metadata stay intact?
Not always. Stream copy preserves the compressed audio and video when possible, but TS may not carry every MP4 metadata feature, caption format, or rotation flag in the same way.
Is TS better than MP4?
Not universally. Use TS when your next tool or streaming workflow expects MPEG-TS. Use MP4 when you want a broadly compatible file for playback, storage, or sharing.