AlphaCut

Trim the desired section from your video

Just set the start and end points, and it will trim that section and save it as a new file.

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

Precise Section Selection

Drag the slider or type in the times directly to precisely select your desired section.

Your video is not sent externally

Trimming is done 100% in your browser, so no data is sent to the server.

Trim directly in your browser

Re-encoding is required, so it may take time depending on the video length, but you can work directly in your browser without any additional installation.

Completely Free. No Usage Limits.

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

Editing guide

Trim a video down to the section people actually need

Video trim means choosing a start and end point from a longer source and saving that continuous section as a new file. It is the first edit to make when you only need a meeting quote, a lecture chapter, a gaming highlight, a product demo moment, or the useful part of a screen recording.

AlphaCut's video trim tool lets you select the range in the browser without sending the source file to an external server. After trimming, you can crop for platform framing or compress the shorter file for upload and sharing limits.

Trim versus multi-cut editing

Trimming keeps one continuous segment. It does not combine multiple scenes like a full editor, but it is the fastest way to remove unnecessary lead-in and ending footage.

Perfect frame-level lossless cuts depend on the file structure and keyframe positions. Browser-based tools may re-encode for compatibility and stable playback, especially across different containers and codecs.

How to choose start and end points

Leave a small amount of breathing room before speech or action begins. Cutting exactly on the first sound can make the result feel abrupt, especially for interviews, tutorials, and demos.

Do the same at the end of the clip. For Shorts or Reels, the first second matters more, so you may choose a tighter start point to keep the hook immediate.

What to do after trimming

Shorter duration usually reduces file size, but upload limits may still require compression. If the clip is going to a vertical platform, crop after trimming so the main subject stays centered.

Play the exported file and check audio entry, caption timing, and scene transitions. If anything feels clipped, shift the start or end point by a second and export again from the original.

Video trim checklist

  • Choose the exact section worth keeping before exporting.
  • Leave a natural margin at the start and end.
  • For Shorts, set the start point around the opening hook.
  • Review audio and caption timing after trimming.
  • Crop or compress the trimmed file for the final platform.

FAQ

Are video files sent externally?

No. The entire trimming process occurs in your browser, so no data is sent to any server.

Does trimming take a long time?

Segment trimming requires re-encoding, so it may take time depending on the video length and resolution. Longer videos will take more time.

Can I precisely select segments down to the second?

Yes, you can drag the slider or directly input the start/end times.

What format will the trimmed file be in?

It will be saved in the same format as the original. If you input MP4, it will output MP4; if WebM, it will output WebM.

Does it work on smartphones?

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

AI can automatically trim interesting sections and create Shorts.

No need to trim manually. AI knows exactly where to cut. Just upload your video, and Shorts will be generated automatically.

Free Online Video Trimmer - Alphacut