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✂️ Video Trimmer
Upload Video
🎬
Drop video file here
or tap / click to browse — MP4, MKV, MOV, AVI, WebM supported
About This Tool
This tool uses FFmpeg.wasm — a WebAssembly port of FFmpeg — to trim your video entirely inside your browser. The output keeps the same format and quality as the original (stream copy, no re-encoding). Your file is never uploaded to any server.
🎬 MP4 · MKV · MOV · WebM
⚡ Stream copy — no re-encode
✓ Zero server transmission
How to Trim a Video Online
1. Upload a video
Choose an MP4, MKV, MOV, WebM, or other supported video file from your device.
2. Set the start time
Use the preview player to find the beginning of the clip, then click Set Start or enter the time manually.
3. Set the end time
Move to the end of the clip and click Set End, or type the exact end time in seconds.
4. Trim and download
Click Trim Video and download the finished clip after browser-side processing completes.
Common Video Trimming Use Cases
Cut clips for social posts
Trim long recordings into short clips for YouTube Shorts, TikTok drafts, Instagram Reels, presentations, or internal demos.
Remove unwanted starts and endings
Cut out setup time, blank frames, mistakes, countdowns, or extra footage before sharing a video file.
Keep private footage local
Because trimming runs in the browser, it is useful for private screen recordings, family videos, or work clips that should not be uploaded to a third-party server.
Frequently Asked Questions
Are my videos uploaded to a server?
No. All trimming is done using FFmpeg.wasm which runs entirely in your browser. Your video files never leave your device and are never transmitted to any server.
What formats are supported?
The trimmer supports MP4, MKV, MOV, AVI, WebM, and many more common video formats. FFmpeg.wasm handles a wide range of codecs and containers.
Will trimming reduce quality?
No. Stream copy mode is used when possible, which cuts the video without re-encoding. This preserves the original video and audio quality exactly, while also being much faster than re-encoding.
Can I trim large video files?
Large files can work, but processing depends on your device memory and browser limits. For very large videos, a desktop browser usually works better than a phone.
Does this work without installing software?
Yes. The trimmer runs in your browser with FFmpeg.wasm, so you do not need to install a desktop video editor for simple cuts.