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Supports: HEVC
Wrap an HEVC (H.265) recording into MXF — the SMPTE ST 377 Material Exchange Format that broadcast ingest, playout, and post-production pipelines expect. Worth knowing before you start: MXF carries broadcast-standard essence, not H.265, so this converter re-encodes your efficient HEVC into MPEG-2 (or H.264). The point is workflow compatibility, not smaller files or better quality.
.hevc / .h265 clip onto the page or click "+ Add Files." Queue several at once — each is converted independently with the settings you choose..mxf file. No sign-up, no watermark.| Property | HEVC (H.265) | MXF (Material Exchange Format) |
|---|---|---|
| Type | Modern video codec | Professional container ("wrapper") |
| Standard | ITU-T H.265 / ISO-IEC 23008-2, approved 2013 | SMPTE ST 377 (orig. 377M, 2004) |
| Essence after conversion | H.265 video | Re-encoded to MPEG-2 (default) or H.264 |
| Compression efficiency | ~50% smaller than H.264 | Heavier — broadcast codecs are less efficient |
| Audio | AAC / PCM in source | Uncompressed PCM 16-bit |
| Player support | Safari, Edge, Chrome 107+ (HW), iOS 11+ | Avid, Premiere, Resolve, VLC; not QuickTime/WMP |
| Best for | Storing originals, 4K/HDR, modern devices | Broadcast ingest, playout, NLE interchange |
No — it usually makes it larger. HEVC is one of the most efficient codecs available, and MXF carries older broadcast essence such as MPEG-2 (or H.264), which needs a higher bitrate for the same picture. Re-encoding an efficient H.265 stream into MPEG-2 inflates the file with no quality regain — this is a lossy-to-lossy transcode, so you trade size for compatibility, not the other way around. If you want a smaller file, compress HEVC instead; if you just need everyday playback, convert HEVC to MP4.
No, it does not keep H.265. MXF here writes MPEG-2 by default, with H.264 available as an alternative; the audio is written as PCM 16-bit. HEVC inside MXF is not a standard broadcast combination, so the H.265 essence is re-encoded to the codec the receiving system expects. Choose MPEG-2 for traditional broadcast servers, or H.264 only if your playout/edit system explicitly accepts AVC in MXF.
The genuine reason is ingest: an Avid Media Composer project, an XDCAM/P2 broadcast pipeline, or a station that has specified MXF as the delivery format. Those file-based systems are built around MXF because it carries timecode and structured metadata through the production chain. If no one has asked you for MXF, you almost certainly want HEVC to MP4 for normal playback instead — MXF won't open in QuickTime, Windows Media Player, or a browser.
Some, because the video is re-encoded rather than copied — MXF wraps different essence than H.265. In our testing, a 1080p HEVC clip re-encoded to MPEG-2 inside MXF at the "Very High" preset showed no obvious artifacts at normal playback but produced a noticeably larger file than the source. Keep the Quality Preset high and avoid round-tripping the same clip through MXF and back repeatedly, since every re-encode is generational.
Your HEVC file is uploaded over an encrypted connection, converted on our servers, and the output is returned to you. Files are deleted automatically a few hours after conversion — no sign-up, no watermark, and they are never shared or made public. The practical limit on a large file is upload size and time, not anything on your device.