MP4 Trimmer — Free, Online, No Upload
MP4 is the universal video format — and this trimmer cuts MP4 files frame-accurately without re-encoding. Trim a phone recording, a screen capture, or a YouTube download in seconds.
Przeciągnij i upuść wideo tutaj lub kliknij, aby przeglądać
Maks. rozmiar pliku: ~2 GB (w zależności od pamięci)
Why use this MP4 Trimmer?
- Stream-copy mode keeps the original H.264 bitstream untouched — zero quality loss.
- Frame-accurate seeking using MP4 keyframe metadata.
- Works with H.264 and H.265 (HEVC) MP4 files alike.
- No upload — privacy-sensitive clips stay on your machine.
How to use it
Drop the MP4 onto the trimmer
Files up to ~2 GB work directly. Larger files may need a bigger browser memory allowance.
Set the start and end timestamps
Drag the timeline handles or type exact timestamps (HH:MM:SS.MMM).
Trim and download
The output keeps the original codec, container, audio tracks, and metadata.
FAQ
Will my MP4 lose quality?
No. The trimmer uses stream-copy by default, which means it does not re-encode the video — output bytes are identical to the source between your trim points.
What about HEVC / H.265 MP4?
Stream-copy works regardless of codec. If you also need to convert to H.264 for compatibility, use the dedicated Video Converter afterward.
Does this run in my browser?
Yes — the tool uses FFmpeg compiled to WebAssembly. Your file never uploads to a server, never leaves your device, and there is no signup or watermark.