Smaller videos. Easier sharing.

Approximate size in MB = total media bitrate in Mbps × duration in seconds ÷ 8, using decimal units. For example, 8 Mbps of combined video and audio for 600 seconds is about 600 MB, plus container overhead.

For a target size, reverse the calculation to estimate the available bitrate. That budget must cover video, audio, and container overhead. Lowering resolution can help at a tight bitrate, but neither resolution nor target size alone guarantees a particular quality.

Duration

At the same average bitrate, twice the duration takes roughly twice the space. If you only need part of a recording, trim it in a video editor before uploading.

Resolution and frame rate

Resolution and frame rate affect how much picture information the encoder must represent. Reducing either can help with a tight size budget, but may remove detail or make motion less smooth.

Motion and detail

Static slides and moving water need different amounts of data to look clear. Motion, fine texture, grain, and scene changes can make a small target harder to reach at an acceptable quality. There is no reliable percentage saving for every clip.

How it was encoded the first time

A high-bitrate camera original may have room to shrink. An already compressed clip may save little, lose more detail, or become larger when encoded again. Compare the downloaded result with the original.

Lower average bitrate usually means a smaller file at the same duration. How far you can lower it depends on the picture: fine text, fast movement, and noise may need more data than a simple static scene. Inspect the parts of the clip that matter to you.

Recommended compression keeps the source resolution by default and uses a quality setting, so its output size is not fixed and can sometimes increase. Use target-size compression for a size ceiling, and choose a lower output resolution if the trade-off suits your use.

Recommended and target-size compression produce H.264 video in an MP4 container. This is the default choice for sharing. AAC audio is included when the source has an audio track.

H.265 is an optional advanced output when enabled. Its playback support depends on the receiving device or app, and it cannot be selected for target-size compression. Keep H.264 when you are unsure what will play the result.

Include audio in your size budget. At an example bitrate of 256 kbps, audio alone takes about 1.92 decimal MB per minute, excluding container overhead. That is 3.84 MB for a two-minute clip before video is counted.

The result uses AAC when the source has an audio track. Silent source videos do not need an audio budget. If you want to remove sound, do that in an editor before uploading; this compressor does not offer an audio-removal control.

Calculation examples only: assume a combined video-and-audio bitrate of 4 Mbps, decimal MB, and no container overhead. Duration = MB × 8 ÷ 4. Real files need room for overhead, and these values do not predict visual quality or platform acceptance.

Compression cannot recover detail missing from the original. Re-encoding an already compressed file may provide little saving and can add visible artifacts. Extremely small targets may need a shorter clip, a lower resolution, or a larger size budget.

Visitor and free-account source videos are capped at 1 GiB. Starter allows up to 2 GiB and Pro up to 5 GiB when that capacity is enabled; otherwise the limit is 1 GiB. Use the limit shown by the upload area. Larger files need to be shortened or re-exported in an editor first.