How to use Compress Video
Compression is lossy re-encoding. It cannot guarantee smaller size, perfect losslessness, and identical quality at once. Estimated size is not a promise.
- Choose video and record its size, duration, and dimensions.
- Set the quality and audio bitrate exposed by this page.
- Start compression and keep the page active.
- Compare sizes and review picture, sound, and sync completely.
Available controls
- Quality / CRF: a higher value is commonly smaller with less detail
- Audio bitrate
- No target-size, resolution, or frame-rate control is currently exposed
What it helps with
- Before/after compression statistics
- Media is read and transcoded in this browser tab and is not uploaded to FreeTool to perform the task.
Compatibility and limits
- No guarantee of an exact target size
- Can introduce blocking, banding, blurred text, and audio loss
- Large WASM encodes can be slow or fail from memory pressure
Frequently asked questions
How do I reach 10 MB?
Lower resolution, quality, and audio bitrate, but content complexity prevents an exact guarantee.
Why is the result larger?
The source may already be efficient and the chosen output settings may be higher.
Is the video uploaded?
Media is read and transcoded in this browser tab and is not uploaded to FreeTool to perform the task.