Video Trimmer

Cut the useful part of a video without sending it away. Set start and end times, keep quality when stream copy is available, and export clips for meetings, social posts, lessons, or highlights.

Drag & Drop Your Video

or click to browse — any video format

Output Format
Trim Mode
Duration

Duration: —

Most trimming jobs are practical: remove the setup time before a screen recording, cut dead air from a webinar, export one highlight from a gameplay file, or shorten a phone video before sharing it. A full video editor is overkill for that, and many web trimmers upload the entire file before doing a simple cut.

This Video Trimmer runs FFmpeg in your browser. For compatible MP4 and MOV files, it can use stream copy, which copies the existing video and audio streams instead of re-encoding them. That keeps the original quality and makes the output much faster. When a format, codec, or cut point requires re-encoding, the tool falls back to a standard H.264 output so you still get a usable clip.

Enter start and end times in HH:MM:SS format and export one continuous section. Stream copy cuts may snap to nearby keyframes, while re-encoded cuts can be more precise. If you need to remove a section from the middle and keep both sides, export the two kept segments separately. For long 4K files, use a desktop browser with enough memory.

Why Use Our Video Trimmer

Lossless Stream Copy

For compatible formats such as H.264 MP4 and MOV, trimming can happen through stream copy. The video data is copied directly without re-encoding, so quality stays unchanged and processing is fast.

100% Private Processing

Your videos stay on your device. The trimmer runs WebAssembly entirely in your browser, so private recordings do not need to be uploaded to a conversion server.

Precision Timecode Input

Set exact start and end times in HH:MM:SS format (e.g., 00:01:30 to 00:04:45). Precision down to the second for clean, accurate cuts.

Format Preservation

When using stream copy, the output container and codecs remain identical to the source. Your video's format, resolution, and quality stay exactly the same.

No File Size Limits

Trim anything from short clips to multi-hour recordings. Processing is local, so the practical limit is your device memory rather than a server-side upload cap.

Instant Results

Stream copy trimming processes in seconds, not minutes. For supported formats, a 1 GB video trims just as fast as a 10 MB one since no re-encoding is needed.

Features

  • Trim any video format (MP4, MOV, AVI, MKV, WebM, and more) by setting precise start and end timecodes in HH:MM:SS format
  • Lossless stream copy for compatible H.264 MP4 and MOV files, with video data copied directly instead of re-encoded
  • Automatic fallback to re-encoding for formats or cut points that cannot be handled safely with stream copy
  • Original format, codec, resolution, and quality preserved when stream copy is available
  • Progress indicator shows trimming status so you know when the clip is ready to download
  • Browser-based WebAssembly processing keeps your videos on your device

How It Works

  1. 1

    Select your video

    Click the upload area or drag and drop any video file. MP4, MOV, AVI, MKV, WebM, and more. The tool analyzes the format to determine if lossless stream copy is available.

  2. 2

    Set trim points

    Enter the start time (when you want the clip to begin) and end time (when you want it to stop) in HH:MM:SS format. For example, 00:00:30 to 00:02:15 extracts a 1 minute 45 second clip.

  3. 3

    Review your selection

    Double-check your timecodes before trimming. The tool shows the duration of your selected clip and whether it will use lossless stream copy or require re-encoding.

  4. 4

    Trim and download

    Click Trim. For compatible formats, processing is near-instant through stream copy, and the trimmed video downloads automatically with original quality preserved.

Who Should Use This Tool

Content creators cutting intros, outros, and mistakes from video recordings
Educators trimming lecture recordings to remove breaks and dead air
Social media managers cutting videos to meet platform duration limits
Gamers extracting highlight clips from long gameplay recordings
Presenters cleaning up Zoom and Teams recordings before sharing
Anyone who needs to quickly cut a section from a video without quality loss

Frequently Asked Questions

What is stream copy and why is it better?

Stream copy, also called lossless trim, copies the video and audio data directly from the source to the output without re-encoding. This means zero quality loss and much faster processing, often seconds instead of minutes. It works best with MP4 and MOV files using H.264 or H.265 video.

When does stream copy not work?

Stream copy requires that the trim points align with keyframes in the video. For precise frame-accurate cuts, or for formats like AVI, MKV, and WebM, the tool may need to re-encode a small section near the cut points. The quality impact is minimal.

Will trimming reduce my video quality?

When stream copy is used for compatible MP4 and MOV files, there is no quality loss because the video data is copied byte-for-byte. When re-encoding is needed, the quality impact is usually minor at the default settings.

Can I trim multiple sections from one video?

The tool trims one continuous section at a time. To remove a middle section, for example cutting out minutes 2-5 while keeping minutes 1-2 and 5-10, export each kept segment separately.

Do my videos get uploaded to a server?

No. All trimming happens locally in your browser using WebAssembly technology. Your video is read, processed, and saved entirely on your device. Nothing is transmitted.

What video formats can I trim?

Any format FFmpeg supports: MP4, MOV, AVI, MKV, WebM, FLV, WMV, 3GP, and hundreds more. Stream copy (lossless) is available for MP4 and MOV with modern codecs.

Is there a limit on video length or file size?

No server-enforced limits. The only constraint is your device's available RAM. Multi-hour recordings work fine on devices with sufficient memory (typically 2-4 GB RAM needed for large files).

How precise are the trim points?

With stream copy, trim points are aligned to the nearest keyframe (typically every 1-10 seconds in most videos). When re-encoding is required, cuts are frame-accurate down to the exact timecode.

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