Drop a .ts (or .m2ts / .mts) file and we remux it to MP4 client-side. H.264 / HEVC / AAC streams pass through losslessly. WebCodecs handles codec mismatches; nothing leaves your machine.
All three are MPEG-2 Transport Stream containers. .ts is the canonical Apple/HLS extension; .m2ts is BDAV (Blu-ray) flavor with extra timestamp packets; .mts is the AVCHD camcorder variant. We accept all three.
This page handles a single standalone .ts file. For multi-segment HLS streams (a folder of .ts files plus an .m3u8 playlist), use the HLS to MP4 tool — it parses the playlist and concatenates segments for you.
No, when codecs match. TS files containing H.264 + AAC remux to MP4 with bit-exact streams (just a different container). Re-encoding only happens if the source uses a codec MP4 cannot hold — rare in practice.
Yes, when your browser has hardware HEVC decode (Safari 16.4+, Edge with hardware support, recent Chrome on capable hardware). 4K HEVC remuxes losslessly. Older browsers may need to re-encode, which is slower.
AVCHD splits long recordings into 4 GB chunks (FAT32 limit). Convert each piece separately, then concatenate the MP4 outputs in your editing app — most NLEs handle this transparently.
Chrome 105+, Edge 105+, Safari 16.4+, Firefox 130+. WebCodecs is required for codec conversion paths.