video station
Compress Video Online
Re-encode a video to MP4 to try to reduce its file size. Choose the available compression preset and compare the output size, picture and sound before sharing.
Active conversion station
Compress Video
Reduce video file size
How to compress a video file
Prepare the source
Select one supported video file.
Review the settings
Choose the compression preset offered by the workspace.
Check the result
Start Conversion and compare the downloaded MP4 with the original.
Supported formats and limitations
Input: MP4, AVI, MOV, MKV, WEBM. Output: MP4. No exact target size or reduction percentage is guaranteed. Already compressed videos may not shrink, and re-encoding can reduce quality.
Processing runs on the server after you select Start Conversion. The interface accepts files up to 500 MB; service and connection limits can be lower. No installation or account is required. Read our file processing privacy policy.
Why Use ConvertFast's Compress Video?
- Create an MP4 copy for sharing or uploading.
- Choose among available compression presets.
Frequently Asked Questions
Can I choose an exact output size in MB?
There is no exact size guarantee. The output depends on source duration, detail and the selected preset.
Should I split or compress a long video?
Split Video makes separate clips. Compression keeps one video and tries to reduce the amount of data used to store it.
Ready? It's Free.
No account required. Input rules appear before you upload.
Open Compress Video Tool