Video Compressor: Compress Video & MP4 Online

Choose a size preset or enter a custom target in megabytes. Audo reserves space for the audio track and MP4 container first, then calculates the highest video bitrate that fits underneath your ceiling. It checks the finished download and refuses an output that cannot meet your requested size.

Pick the Discord free preset to stay under 10 MB or 20 MB attachment caps, or the 50 MB preset for Nitro Basic. Because Audo measures sizes in decimal megabytes, any clip that meets the target also fits platforms that measure limits in MiB.

Use Quality mode when visual sharpness matters more than hitting an exact byte cap, or combine a target MB size with a step down from 4K or 1080p to 720p. Giving the encoder slightly fewer pixels allows each remaining pixel to keep more detail at the same file size.

Every second of video needs a minimum amount of data to stay watchable. A long recording at 1080p and 60 fps may require more bits than a small attachment limit allows. Lower the resolution height, cap the frame rate, mute unneeded audio, or trim the clip first.

Yes. Scaling a tall 1080p or 4K clip down to 720p cuts the pixel count by more than half while looking crisp on phones and laptops. Capping a 60 fps screen recording at 30 fps also frees bitrate for clearer text and faces.

Audio is encoded as a compact 96 kbps stereo AAC track so most of your megabyte budget goes to the picture. Choosing Mute removes the audio track completely and gives 100% of the target file size to the video stream.

Yes. Audo processes the first 10 minutes free, 10 times a day, without an account. The whole file costs $0.01 a minute ($0.60 an hour), charged only on success. No subscription. See pricing.