Video Trimmer - No Upload Required
Unlike every other online video trimmer, JustTrimVideo never uploads your files anywhere. Your video is processed entirely in your browser using WebAssembly technology. Zero upload time, zero privacy risk, zero waiting.
Your Video Never Leaves Your Device
How It Works Without Uploading
JustTrimVideo uses FFmpeg compiled to WebAssembly (WASM) to run directly in your browser:
- 1 File loads into browser memory
When you select a video, it loads into your browser's local RAM - not transmitted anywhere.
- 2 FFmpeg runs locally
The same professional video tool used by studios runs right in your browser via WebAssembly.
- 3 Output saves to Downloads
The trimmed video saves directly to your device. Still no network transmission.
- 4 Close tab, data gone
When you close the browser tab, all video data is cleared from memory. Nothing persists.
Upload-Based Tools vs No-Upload
| Aspect | Upload-Based Tools | JustTrimVideo (No Upload) |
|---|---|---|
| Wait time for 1GB file | 10-30 minutes upload | Instant (seconds) |
| Privacy | Video on their servers | Never leaves your device |
| Data breach risk | Your video could leak | Nothing to breach |
| Works offline | No | Yes (after first load) |
| File size limits | Often 500MB-2GB | Your device's RAM (2-4GB+) |
Who Needs No-Upload Trimming?
Privacy-Conscious Users
Anyone who doesn't want their videos on third-party servers.
Legal Professionals
Evidence and deposition videos that can't leave your control.
Corporate Users
Internal videos that must stay on company-approved devices.
Slow Internet Users
Skip the 30-minute upload - process instantly regardless of connection.
Content Creators
Unreleased content stays unreleased until you're ready.
Parents
Family videos stay private - not on some company's server.
Verify It Yourself
Open your browser's Developer Tools (F12) and go to the Network tab. Load a video and trim it. You'll see zero video data being transmitted - only the initial page load. The video stays entirely on your device.
Ready to trim without uploading?
Go to the Video Trimmer →