Cut Video Online Free
Trim any video by setting a start and end time. Choose MP4 or WebM output and download your clip instantly. No signup, runs entirely in your browser.
Drop your video here
MP4, MOV, AVI, MKV, WebM — up to 500 MB
Browse fileHow the Video Trimmer Works
- 1Drop or select your video file. The tool accepts MP4, MOV, AVI, MKV, WebM, and other formats up to 500 MB. A preview plays the video so you can identify the exact segment to keep.
- 2Set the start and end times. Enter the start and end timestamps in seconds. The tool shows the formatted time (e.g., 1:30.0) and the total trimmed duration so you can confirm the range before converting.
- 3Choose your output format. Select MP4 for maximum device compatibility or WebM for an open-format file. Both are re-encoded for frame-accurate cuts.
- 4Trim and download. FFmpeg runs in your browser via WebAssembly, cutting the video at the exact frames you specified. Preview the result and download your trimmed clip.
Frame-Accurate Trimming via WebAssembly
Most browser-based video cutters that use stream copy can only cut at keyframe boundaries — every few seconds — meaning your clip starts or ends a second or two off from what you specified. This tool re-encodes the video using FFmpeg running in your browser via WebAssembly, so the cut lands on the exact frame you entered. The trade-off is a slightly longer processing time, but the precision is worth it for anything where timing matters.
Tips for Getting a Clean Cut
Use the video player to find timestamps
Pause the video preview at the exact moment you want the cut. The player shows the timestamp in seconds — enter that value directly into the start or end time field.
Add a small buffer before the action
If your clip starts mid-action, set the start time 0.5–1 second earlier than the moment you want. This prevents abrupt cuts and gives viewers a brief visual lead-in.
Choose MP4 for sharing
MP4 files open on every platform — Windows, macOS, iOS, Android, WhatsApp, Telegram, and email. Use WebM only if you know the recipient's player or platform supports it.
Close other tabs for large files
Files over 200 MB require significant browser memory. Closing other tabs frees RAM and can prevent the tab from crashing on devices with 8 GB or less memory.
Convert to GIF after trimming
Once you have a short trimmed clip, use the Video to GIF Converter to create an animated GIF for social media, documentation, or messaging apps.
Extract audio from the trimmed clip
Download your trimmed video, then use the MP4 to MP3 Converter to strip the audio track. This is useful for isolating a specific speech segment or music excerpt.
Frequently Asked Questions
Is my video uploaded to a server?
No. All trimming happens in your browser using FFmpeg compiled to WebAssembly. Your video file never leaves your device — no server, no cloud storage, no data transfer. The tool works offline once the WASM engine has loaded.
Which video formats are supported?
The tool accepts MP4, MOV, AVI, MKV, WebM, M4V, FLV, WMV, OGV, TS, and 3GP files — any format FFmpeg can decode. Files up to 500 MB are accepted.
Why does the first trim take longer?
The first trim downloads the FFmpeg WebAssembly engine (~10 MB) from a CDN, which takes 5–20 seconds depending on your connection speed. Once loaded, the engine stays in memory and subsequent trims start immediately.
How do I find the exact start and end times?
Use the video preview player above the options. Play the video, pause it at the moment you want the trim to start, and note the timestamp shown in the player controls. Enter that value in the "Start time" field. Do the same for the end time.
Why is the output re-encoded instead of stream-copied?
Stream copying (copying frames without re-encoding) is faster but only cuts on keyframes, which are spaced seconds apart. This means your trim would snap to the nearest keyframe rather than the exact second you specified. Re-encoding ensures frame-accurate cuts at precisely the timestamps you set.
Which output format should I choose?
MP4 (H.264 + AAC) is the safest choice — it plays on virtually every device, browser, phone, and smart TV. WebM (VP8 + Opus) is an open format that produces slightly smaller files and is natively supported in modern browsers, but older devices and Apple hardware may not support it without conversion.
What is the maximum video file size?
The tool accepts files up to 500 MB. For very large files, trimming can be slower because the entire file is read into browser memory. If you run into issues with files over 200 MB, close other browser tabs to free up RAM.
Can I trim the audio-only portion of a video?
The Video Trimmer outputs a video file with both audio and video intact for the selected time range. If you want audio only, use the MP4 to MP3 Converter to extract the audio track first, then trim using an audio editor — or trim the video here and then convert.