Free Online Video Trimmer - Cut MP4, MOV, AVI Files in the Browser
Compare the best free online video trimmers. Why browser-local tools like NanoPix beat upload-based editors for privacy, speed, and file size limits.
Most online video trimmers work one of two ways: cloud upload (your file leaves your device) or browser-local (processing stays on your machine). Here is how they compare and what to look for when choosing a video trimmer.
Cloud upload vs browser-local
| Feature | Cloud trimmer | Browser-local (NanoPix) |
|---|---|---|
| File leaves your device | Yes—uploaded to their server | No—stays in your browser |
| Privacy | Third party handles your footage | Your device only |
| Max file size | Often capped at 500MB–2GB | Limited by your RAM only |
| Speed | Upload + queue + process + download | Instant start, local encode time only |
| Cost | Free tier often limited (watermark, daily caps) | Free, no account needed |
| Watermark | Common on free plans | None |
| Export quality | May degrade on free tier | Full quality, configurable |
What to look for in a video trimmer
When evaluating online video trimmers, check these criteria:
- No upload required — does the tool say "upload" or "processing on device"? This makes a huge difference for privacy
- Format support — MP4, MOV, MKV, AVI, WebM, FLV — the more formats, the better
- Stream copy — the ability to trim without re-encoding preserves quality
- Multi-segment — can you cut multiple ranges from one video?
- Export options — merge all segments together or export each segment separately
- File size range — can it handle large files (several GB)?
Why NanoPix stands out
NanoPix Trim checks all the boxes: no upload required, supports MP4/MOV/MKV/AVI/WebM/FLV and more, offers stream copy for H.264 sources, supports multi-segment trimming, and provides both merge and separate export options. All processing runs locally using WebAssembly, so your files stay private on your device.
How to choose the right trimmer for your needs
| Your priority | Best option |
|---|---|
| Privacy (sensitive footage) | Browser-local: NanoPix |
| No installation | Both cloud and local qualify |
| Very large files | Browser-local (no upload bottleneck) |
| Quick edits | Browser-local (no queue, instant start) |
| Collaborative editing | Cloud tools with shared projects |
| Format variety | NanoPix supports most common formats |
Related tools
Once trimmed, you may want to merge videos (join multiple clips), crop the frame (adjust aspect ratio), or convert to MP4 (change codec)—all in the same browser-local workflow with NanoPix.
FAQ
Is there a truly free online video trimmer?
Yes. NanoPix is completely free with no usage limits, no watermark, and no account required. No hidden premium tiers.
Can I trim 4K videos online?
Yes. NanoPix handles 4K videos as long as your device has enough RAM. Processing may be slower than HD due to the larger frame size—4K has 4× the pixels of 1080p.
How do I trim without losing quality?
Use stream copy mode when available (H.264/HEVC sources). This copies segments without re-encoding, preserving the original quality perfectly. Check the source codec before trimming.
Do I need to install software to trim videos?
No. Everything runs in your browser. No download, no installation, no plugins. Works in Chrome, Edge, Firefox, and Safari.
Is there a time limit on how long I can trim?
No time limits. You can trim videos of any duration. Processing time depends on the video length and your device's CPU.
Can I undo a trim?
Once exported, the trimmed video is a separate file—your original remains unchanged. You can always re-trim the original with different settings.