Quick Watermark

ComfyUI Quick Watermark

A small ComfyUI custom node that applies one PNG watermark image across every frame in an IMAGE batch. Video workflows usually pass frames as a batched IMAGE, so this works for still images and videos.

Node

Quick Watermark Video is available under image/watermark.

Inputs:

• image: the source image or video frame batch.
• watermark_preset: built-in watermark to use when no watermark input is connected. Options are speaker-white and speaker-black.
• watermark optional: an image from Load Image, usually a PNG logo or watermark. When connected, this overrides watermark_preset.
• alignment: watermark placement. Defaults to bottom-right.
• offset_percentage: margin from the selected edge, based on the source frame size.
• resize_percentage: watermark width as a percentage of the source frame width.
• opacity: global watermark opacity from 0 to 100. Defaults to 60.
• watermark_mask optional: connect the mask output from ComfyUI Load Image to preserve PNG alpha transparency.

The node returns the watermarked IMAGE batch.

PNG Alpha

ComfyUI's Load Image node separates PNG alpha into its mask output. To preserve transparent watermarks, connect both:

• Load Image.image to watermark
• Load Image.mask to watermark_mask

The built-in presets use their PNG alpha automatically. If a custom watermark image is connected with no mask, the watermark image is treated as fully opaque before the opacity setting is applied.