SenpaiCut - Free Online Video Trimmer

YOUR DATA STAYS WITH YOU

Videos never leave your device Nothing is uploaded. No server ever touches your file.
All processing happens in your browser FFmpeg runs as WebAssembly locally. Your CPU does the work, not ours.
No account. No login. No cookies. We do not collect, store, or transmit any personal data.
No analytics or tracking No Google Analytics, no telemetry, no fingerprinting.
Exported files go straight to your downloads The output is written directly to your device by the browser.
Closing the tab clears everything Your video and all edits exist only in browser memory while the tab is open.

SenpaiCut is a 100% client-side tool. The source is plain HTML/JS you can inspect right now with F12.

Processing...

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Trim

Start

End

Fast (stream copy, may glitch at cut point)

Trim + Cut (multi-segment)

Set in/out points on the timeline, click Add Segment for each section to KEEP, then export.

Crop

Drag the handles on the video to set your crop. Corners keep aspect ratio; edges resize freely.

Rotate / Flip

Rotation

Flip

Current: 0 degrees, no flip

Volume

Volume: 100%

Exact value (%)

Speed

Speed: 1.00x

Resolution

Original

→

Output

Target height

Loop

Total plays (loops)

Output will contain the video repeated N times back to back.

Stabilize

Smoothing: 10

Two-pass process. Requires vidstab in the FFmpeg build. May show an error if unavailable.

Add Text

Text

Font size (px in video)

Color

X position (px in video)

Y position (px in video)

Start time (seconds)

End time (0 = whole video)

Add Image / Watermark

Image file (PNG recommended)

X position (px)

Y position (px)

Scale width (0 = original)

Opacity: 100%

Remove Logo / Watermark

Draw a rectangle over the logo on the video to mark the area to remove.

X (px)

Y (px)

Width (px)

Height (px)

Output Format

Format

Quality CRF 23 (lower = larger/better)

SENPAI CUT