Convert HEVC / H.265 Video to MP4
Your video is processed locally in this browser.
Choose video
MP4, MOV, WebM, MKV and other supported formats
Conversion settings
Remux where possible, otherwise encode on this device.
Files are processed in your browser memory and are never uploaded.
Convert an iPhone or other HEVC video to H.264 MP4
Choose a HEVC / H.265 video to check whether this browser can decode it and create a more widely compatible MP4. The converter uses your device and keeps the selected video in your browser.
Example only: an illustrative 4K HEVC video might convert from 284 MB to a 1080p H.264 MP4 of 91 MB. Actual output size, quality and conversion time depend on the clip and device.
What is HEVC / H.265?
HEVC (High Efficiency Video Coding), also called H.265, is a video compression format used by many newer phones and cameras. It can store video efficiently, but a receiving app or browser must support the codec inside the file.
Why HEVC videos sometimes do not play or upload
Upload problems can come from the video codec, its MOV or MP4 container, high resolution, frame rate, HDR profile, file size, or limits in the destination app. Changing the file extension alone does not change its codec.
Why H.264 MP4 is more widely compatible
MP4 files containing H.264 video and AAC audio are accepted by many browsers, phones and social platforms. Platform limits still differ, so check the destination’s current requirements.
HEVC to H.264 conversion
To convert HEVC to H.264, the video must be decoded and encoded again. This can reduce quality or change file size; choose Original, 1080p or 720p based on your needs. The controls above let you convert to MP4 or WebM, select resolution and choose quality.
Remux vs re-encode
Remuxing copies compatible audio and video streams into a different container without recompressing them. For example, a compatible H.264/AAC MOV may be remuxed into MP4. HEVC to H.264 requires re-encoding because the video codec changes.
Using HEVC video from an iPhone
iPhones may record in HEVC to reduce storage use, depending on camera settings and device. If a website rejects a clip, try a supported H.264 MP4 copy and, if needed, reduce 4K video to 1080p.
Browser and device codec support
Local decoding and encoding depend on the browser, operating system and hardware. This converter checks codec support before conversion. Some devices cannot decode HEVC or encode H.264 in the browser; in that case it will show an error instead of claiming the conversion succeeded.
Your video stays in your browser
The selected file is processed locally using this browser’s media capabilities. It is not uploaded to GYROX for conversion. Large files may require substantial memory and battery.
Frequently asked questions
Can I convert H.265 to H.264 MP4?
Yes, if this browser and device can decode the selected HEVC profile and encode H.264. Support is checked when you start conversion.
Will changing MOV to MP4 reduce quality?
If the video and audio codecs are compatible, remuxing can copy the streams without re-encoding. If a codec must change, the video is re-encoded.
Why is HEVC conversion unavailable on my device?
Some browser and device combinations cannot decode HEVC locally or do not expose a compatible H.264 encoder. Try a browser and device with codec support, or use a source format your browser can decode.
Does the example file size predict my result?
No. The displayed 284 MB to 91 MB example is illustrative only; results depend on duration, resolution, motion, quality settings and encoder behavior.