MP4 Converter
MP4 is the most broadly compatible modern video container, so it is a practical output when a file needs to work across phones, browsers, TVs and Windows apps.
When this format makes sense
Choose MP4 when compatibility matters more than retaining a source container.
For H.264 output, use a compatibility-oriented preset; H.265 or AV1 can reduce size when the playback device supports them.
When the source streams already fit the MP4 container, FastConvert can use stream copy rather than re-encoding.
Advertised targets
MP4H.264H.265 / HEVCAV1AACMP3
Local conversion workflow
- Add your source file.
- Select the MP4 output.
- Review codec and quality choices for the destination.
- Convert locally and verify the result.
Frequently asked questions
Does FastConvert upload my file?
No. The project describes a local FFmpeg workflow with no media upload stage.
Can I use hardware encoding?
Where the packaged application and the installed hardware expose a compatible encoder, the project advertises automatic NVIDIA, Intel and AMD hardware acceleration.
Use FastConvert locally. Download for Windows or browse the format guide.