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H.264 to MP4 (H.264) - Online Video Converter
Convert H.264 to MP4 (H.264) online. Private, client-side - no upload required. Batch conversion, quality presets, codec control.
Convert H.264 to MP4 (H.264)
Drop H.264 video here or click to select
H.264, MP4
MP4 (H.264) (H.264 / AAC)
About H.264 to MP4 (H.264)
Convert H.264 to MP4. H.264 is the AVC codec behind most MP4 and broadcast video. MP4 pairs H.264 video with AAC audio in the ISO base media container. H.264 has no alpha channel, so transparency is dropped..
Why convert H.264 to MP4 (H.264)?
- Smaller files with MP4 lossy compression.
- Keep animation and transparency where supported.
- Private, no upload - runs in your browser.
H.264 vs MP4 (H.264)
| Animation | Yes | Yes |
|---|---|---|
| Transparency | No | No |
| Compression | lossy | lossy |
| Typical use | H.264 is the AVC codec behind most MP4 and broadcast video. | MP4 pairs H.264 video with AAC audio in the ISO base media container. |
When not to convert H.264 to MP4 (H.264)
- Skip MP4 for archival masters: lossy compression discards detail, so keep the H.264 original.
- Keep a master copy: repeated exports stack small losses, so archive H.264 before batch MP4 shares.
Limits
Starting point: H.264 - H.264 is the AVC codec behind most MP4 and broadcast video. Annex-B headers usually import cleanly into MP4. H.264 has no alpha channel, so transparency is dropped. Encode MP4 (H.264 / AAC) from H.264 at a bitrate near the source, and confirm the audio track before converting.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.
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FAQ
How do I convert H.264 to MP4 (H.264)?
Drop your H.264 file onto this page, choose quality and codec settings, then click Convert. The result downloads as MP4 (H.264) instantly. All processing runs in your browser.
What codec is used for MP4 (H.264)?
The default codec for MP4 (H.264) is H.264 / AAC. You can change the video and audio codec in Advanced mode.
How do you store my files?
We do not store any processed videos. All conversion happens entirely in your browser using FFmpeg WASM.