Compress
MP4 Compressed MP4
Convert MP4 to Compressed MP4 free. No signup. Files deleted after 1 hour.
75
Max 50MB5 conversions/hourView Basic and Pro plans →
About Compress MP4
Re-encode an MP4 at a lower bitrate to shrink the file. The tool defaults to H.264 at a constant rate factor that targets visual quality first and file size second.
Frequently asked questions
What CRF value should I pick?
23 is the default and looks identical to the source for most viewers. 28 is a more aggressive size cut still acceptable for web.
Will resolution change?
Only if you ask. Re-encoding alone keeps the original dimensions.