Edit Video Online (Trim / Merge / Watermark / Convert)

Select or drag & drop video files to trim, merge, watermark, crop, or convert right in your browser. 100% local for total privacy.

Click or drag & drop video file here (MP4, MOV, WebM) No file size limit. Processed locally. Select multiple files to merge or batch-process.

Multi-file mode

Merge into one video

Process each file separately

Clips are joined in the list order below, each used in full (trimming isn't available in merge mode). Use the up/down arrows to reorder. To guarantee a safe merge, resolution is normalized to the size chosen below ("Original" automatically falls back to 720p), and audio is downmixed to mono.

已選取 0 個檔案

Trim Range

0:00 0:00

已選取：0:00 - 0:00（共 0 秒）

Video Adjustments

Remove audio (mute output)

Crop aspect ratio

Add watermark

Text watermark

Image watermark

Color

Opacity 80%

Size

Drag directly on the video preview above, in "Trim Range", to set the watermark position

No draggable preview right now (multi-file mode, or no file selected yet) - the current relative position will still be used. Switch to a single file to adjust it visually.

Output Type

Video (with picture)

Audio only

Output Format

MP4 (H.264, most compatible)

WebM (VP8, open-source)

Quality

Resolution

Video encoding runs entirely in-browser via software - slower than desktop editors. Try a short or lower-resolution clip first; long or high-quality clips may take several minutes.

Audio Format

MP3

AAC (M4A)

WAV (uncompressed)

Audio Quality

Extracts the audio track from your video and exports it as an audio file (no picture); WAV is lossless, so the file will be noticeably larger.

Results

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