How to use it
- Choose a video file.
- Choose Text and type it, or Logo image and pick the file.
- Set the size, opacity and position. The preview shows a frame with the mark.
- Press Add watermark, wait for the recording, then download.
How it works
Each frame is drawn on a canvas and the mark is drawn on top with the chosen opacity. Text gets a thin dark outline so it reads on light and dark scenes. The position is one of nine anchors with a margin of 3% of the shorter frame side. The canvas and the sound are recorded with MediaRecorder.
Worked example
A 1920 × 1080 video with a logo at 20% width (384 px) that is 5:1 in shape, so 76.8 px high, placed bottom right: the margin is 0.03 × 1080 = 32.4 px, so the logo’s top-left corner is at x = 1920 − 384 − 32.4 = 1503.6 and y = 1080 − 76.8 − 32.4 = 970.8.
Tips
- 40–60% opacity marks ownership without hiding the picture.
- A corner position is less likely to cover faces or subtitles than the centre.
- For still images use the image watermark tool instead.