Cut the unwanted start and end off an MP4, MOV, WebM or MKV video in seconds, without re-encoding it. Nothing is uploaded, and there’s no account or watermark.
Drop the video (MP4, MOV, WebM or MKV) on the page or tap to choose it. The whole video is selected to begin with.
Move the “Position in the video” slider to where the clip should begin and press “Set start here”, then do the same for the end with “Set end here”. You can also type times such as 12.5 or 1:02.5 in “Start” and “End”.
Under “Cutting mode”, keep “Fast, no re-encoding”, or choose “Frame-accurate (re-encode)” when the first frame must be exact.
Press “Trim video”, then press Download to save the result, named after the original with “-trimmed” added.
Compressed video doesn't store every frame as a full picture. It saves a complete image, called a keyframe, only now and then, and records the frames in between as changes from the ones before. Phones often place a keyframe every second or two; some screen recorders and streaming setups space them further apart.
Fast mode copies the compressed frames exactly as they are, without decoding them. The frames after your start can't be drawn without the keyframe before it, so that keyframe has to be in the file. In MP4 and MOV, filetidy keeps those few extra frames but hides them with an edit list, an instruction in the file that tells players where playback really begins: in most players the clip starts exactly at your chosen time, though some older players and editors ignore edit lists and show the extra moment. WebM and MKV have no such instruction, so the clip starts on the nearest keyframe at or before your start, and the result tells you where, for example “Fast mode began the clip at 0:03.0, the nearest keyframe.” The end can fall on any frame. Nothing is re-compressed, so even a long 4K file is done in seconds.
Fast mode also keeps the container and codecs: an MP4 stays MP4, a MOV from an iPhone stays MOV with its original HEVC or H.264 video, and WebM and MKV files keep their format. Frame-accurate mode decodes the video and encodes a new MP4 (H.264 video, AAC audio) that starts on the exact frame you picked; it takes longer and re-compresses the picture slightly.
Either way, the work happens in your browser, and descriptive metadata such as the location phones write into videos is left out of the trimmed file.
iPhone & iPad
If you replaced the clip, you can go back later with Edit > Revert.
Mac
Android
Phone makers' own gallery apps, such as Samsung Gallery, have a similar trim tool under Edit.
Fast mode suits most trims: removing the seconds of dead air before you start talking in a recording, or the fumble with the phone at the end of a clip. With MP4 and MOV the start is exact in most players, and with WebM or MKV a fraction of a second early rarely matters; the original quality, resolution and format stay exactly as they were.
Choose frame-accurate when the cut has to land on a precise beat, word or movement, or when you want an MP4 anyway, for example from a WebM or MKV that you plan to share. Expect it to take roughly as long as a conversion and to lose a little sharpness.
Platforms cap the length of uploads, and those caps change often, so check the app's current limit and trim to fit before you post rather than letting the app cut for you.
Trim before you compress. A size target such as an email attachment or a Discord upload is shared across every second of the video, so a shorter clip gets more data per second and looks noticeably sharper after compression. Cut first here, then use filetidy's Compress video tool on the result.
Not in fast mode: the compressed frames are copied bit for bit, so the trimmed part is identical to the original. Frame-accurate mode re-encodes the picture, which causes a small loss that is hard to see at normal viewing size.
With WebM and MKV files, fast mode has to begin on a keyframe, and the nearest one may sit a moment before your start; the result shows the real start time. MP4 and MOV clips start exactly in most players, but some older players and editors ignore the edit list that hides the extra frames. If either case bothers you, switch to “Frame-accurate (re-encode)” and trim again.
Not in one go: this tool keeps one continuous range between a start and an end. To drop a middle part, you'd need to export the two pieces separately and join them in a video editor.
In fast mode, the same as the source: MP4, MOV, WebM or MKV, with the same video and audio codecs. In frame-accurate mode, always MP4 with H.264 video and AAC audio, which plays almost everywhere.
Yes. Some MKV files, or HEVC videos in certain browsers, can't be shown in the player, but they can still be cut. Type the start and end times in the “Start” and “End” fields and press “Trim video”.
Compression spreads a fixed size over the whole duration. Removing 30 seconds of a 90-second clip gives each remaining second half as much data again, so the compressed result is clearly sharper at the same file size.
No. The cut is made by your browser on your device, and the trimmed copy is saved back to it. filetidy never receives the video, and the original file isn't modified.
Last updated October 28, 2026