Convert H264 File to MP4 Online for Free | FullyFreeTools
Convert H264 File to MP4 Online
Convert H264 video files to MP4 format online for free. Supports raw H264 streams and container formats. Fast remuxing preserves quality. No signup, no limits, 100% free.
No signup
Quality preserved
100% free
Convert H264 to MP4
Converting Video...
Processing your H264 video file. This may take a few minutes.
How to convert H264 to MP4 Online
Upload your H264 video file using the file selector above. Supported formats include raw H264 (.264, .h264, .avc) or container formats (.mkv, .avi, .mov, .flv, .m2ts, .ts).
Click Convert H264 to MP4 to start the conversion process.
Wait for the conversion to complete. Video conversion may take a few minutes depending on file size.
Download your MP4 video file. The converted file is optimized for playback and streaming.
About H264 format
Popular Codec: H264 (also known as AVC) is the most widely used video codec
Raw Streams: Raw H264 files (.264, .h264) need to be packaged into a container format like MP4
Container Conversion: For container formats, we remux the H264 stream into MP4 without re-encoding (fast and quality-preserving)
Compatibility: MP4 container provides universal compatibility across all devices and players
Frequently Asked Questions
What is an H264 file?
H264 (also called AVC - Advanced Video Coding) is a video codec, not a file format. H264 files can be raw video streams (.264, .h264, .avc) without a container, or H264 video inside various container formats like MKV, AVI, MOV, etc. MP4 is a container format that can hold H264-encoded video.
Why convert H264 to MP4?
MP4 is the most universally supported video container format. Converting H264 to MP4 ensures compatibility with all devices, media players, streaming services, and video editing software. MP4 also supports streaming optimization and metadata.
Will video quality be maintained?
Yes, for container formats (MKV, AVI, MOV, etc.), we use codec copying which preserves the original H264 video without re-encoding. This means zero quality loss and very fast conversion. For raw H264 streams, we package them into MP4 without re-encoding when possible.
What file formats are supported?
We support raw H264 files (.264, .h264, .avc) and container formats containing H264 video (.mkv, .avi, .mov, .flv, .m2ts, .ts). The converter detects the format and processes accordingly.
How long does conversion take?
For container formats (remuxing), conversion is typically very fast - under 1 minute for most files since we copy the codec without re-encoding. For raw H264 streams, conversion may take 2-5 minutes depending on file size. The progress indicator shows conversion status.
What is the difference between remuxing and re-encoding?
Remuxing (what we do for container formats) extracts the H264 video stream and repackages it into MP4 without changing the video data - this is fast and preserves 100% quality. Re-encoding would decode and re-compress the video, which is slower and may reduce quality. We prefer remuxing when possible.
What is the maximum file size?
The maximum file size is 500MB. For larger videos, consider splitting them into smaller segments or using video compression before conversion.
Are my files secure?
Yes, all file processing happens securely on our servers. Files are processed immediately and are not stored permanently. We prioritize your privacy and security.
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