Video Compressor

Name: AlphaCut
Brand: AlphaCut
Rating: 4.8 (5798 reviews)

Reduce file size while maintaining maximum video quality.

Your files are not uploaded to our server. All processing happens on your computer.

Drag and drop your video file here, or click to select.

Supports MP4, WebM, MOV, MKV

Flexible Compression Quality Settings

Easily compress using quality presets, or enter a target size directly to achieve your desired file size.

Your Videos Are Not Sent Externally

Compression happens 100% in your browser, so no data is ever sent to our servers.

Completely Free. No Limits.

There are no limits on the number of compressions or file size.

Reduce Resolution for Lighter Files

Reducing 4K videos to 1080p, or 1080p to 720p, significantly reduces file size. This is especially useful when sending videos for mobile.

Compression guide

How to reduce video file size without losing the parts viewers notice

Video compression is not just a smaller-file button. The right settings depend on where the file is going: an email attachment, a chat upload, a client review, a lecture download, or a mobile-first social post. AlphaCut's compressor runs in the browser, so MP4, WebM, MOV, and MKV files can be compressed without sending the source video to an external server.

Start with the job the file has to do. For archive copies, keep the original resolution and use light compression. For mobile sharing, dropping 4K to 1080p or 720p usually saves far more space than viewers will notice on a phone. For strict upload limits, enter a target size in MB and let the tool prioritize the final file size.

Choose quality by use case

Light compression is best for interviews, product demos, tutorials, and screen recordings where small text and facial detail matter. Medium compression is a practical default for social uploads and team reviews. Strong compression makes sense for preview files, rough approvals, and clips where fast transfer is more important than perfect fidelity.

High-motion footage such as sports, gaming, and concerts is harder to compress cleanly because each frame changes quickly. For those files, start one quality level higher, check the result, and only reduce further if the file is still too large.

Resolution often matters more than the preset

Reducing 4K to 1080p cuts a large amount of pixel data and can shrink the file dramatically. If the source is already 720p or lower, resolution changes will help less; the compression preset and audio removal option become more important.

For Shorts, Reels, TikTok, and chat previews, 1080p is usually enough. Keep the original as a master file, then export a lighter sharing copy for the specific platform.

What to check before sharing

Browser-based compression uses your device memory and CPU. Long 4K files are more stable on a desktop, while older phones or battery saver mode can make processing slower.

After downloading, review captions, small interface text, skin tones, and fast-motion sections. If those areas look too soft, export again with a higher quality preset instead of reworking the original file.

Recommended compression workflow

Keep the original and the compressed sharing copy separate.
Try 1080p or 720p first for mobile distribution.
Use target MB when the destination has a hard upload limit.
Remove audio when the clip does not need sound.
Play the final file on the platform where it will be used.

FAQ

Are videos uploaded to a server?

No. The entire compression process occurs in your browser, so no data is ever sent to our servers.

How large of a file can be compressed?

There is no file size limit. However, since it uses device memory, very large files may have varying processing speeds depending on your device's specifications.

Does compression significantly reduce video quality?

The 'High' setting maintains quality that is almost indistinguishable from the original. The 'Medium' setting also retains sufficient quality for general viewing.

Can I achieve a precise target file size?

Yes, if you enter a target size (MB), the system automatically calculates appropriate settings based on video length and resolution to compress it close to that size. If the entered size is too small, the lowest quality will be applied, but it may not be compressed to the exact desired size.

Does it work on smartphones?

Yes, it works on mobile browsers. However, compressing large videos on a PC is generally faster and more stable.

Want to create Shorts with your converted video?

Upload your converted video. Our AI will pick out interesting segments and turn them into clips for Shorts, Reels, and TikTok.