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Overlay or watermark images by merging with another image

Marcel Claus-AhrensMarcel Claus-Ahrens
6571 views
2/3/2026
IMAPData ExtractionAttachmentsEmailCSV
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Instructions

This automation overlays a background image with another image, making it easy to add watermarks or logos.

You can use this automation to watermark your images by overlaying them with a transparent version of your logo. If you'd like to place your logo in a specific corner, feel free to adjust the position of the overlay image in the code node.

How it Works

  1. Both images are downloaded, so we can process binary files (you can modify the source, tho.)
  2. We extract metadata, focusing on the dimensions of each image.
  3. The position of the overlay image is calculated (default: dead center of the background image).
  4. The two images are composited together.

Limitations and Optimisation Opportunities

  1. The overlay image must be the same size or smaller than the background image for proper alignment.
  2. The overlay image does not automatically scale to match the proportions of the background image.

Image
Enjoy the workflow! ❤️
let the work flow — Workflow Automation & Development

Overlay or Watermark Images by Merging with Another Image

This n8n workflow provides a simple, manual way to overlay or watermark images by merging a base image with a second image. It's ideal for quickly applying branding, watermarks, or decorative elements to images without needing external image editing software.

What it does

This workflow performs the following steps:

  1. Manual Trigger: The workflow starts when manually executed.
  2. Edit Fields (Set): This node is intended for you to define the URLs of the two images you want to merge:
    • base_image_url: The URL of the image that will serve as the background.
    • overlay_image_url: The URL of the image that will be overlaid on top of the base image.
  3. HTTP Request (Base Image): Downloads the base image from the provided base_image_url.
  4. HTTP Request (Overlay Image): Downloads the overlay image from the provided overlay_image_url.
  5. Merge: Combines the outputs of the two HTTP Request nodes, ensuring both images are available for the next step.
  6. Edit Image: This is the core image manipulation step. It takes the downloaded base image and composites the overlay image onto it. You can configure various options here, such as:
    • Operation: Composite
    • Input: The base image.
    • Composite Image: The overlay image.
    • Gravity: Controls the position of the overlay (e.g., NorthWest, Center, SouthEast).
    • Blend Mode: How the overlay blends with the base image (e.g., Over, Multiply, Screen).
    • Tile: Whether the overlay image should be tiled across the base image.
  7. Code: This node is currently empty but can be used for further custom processing of the image data, such as converting it to a specific format or adding metadata, if needed.

Prerequisites/Requirements

  • n8n Instance: An active n8n instance to import and run the workflow.
  • Image URLs: Accessible URLs for both the base image and the overlay/watermark image.

Setup/Usage

  1. Import the workflow: Download the provided JSON and import it into your n8n instance.
  2. Configure Image URLs:
    • Locate the "Edit Fields" node.
    • Update the base_image_url and overlay_image_url values with the direct URLs of your desired images.
  3. Configure Edit Image Node:
    • Open the "Edit Image" node.
    • Ensure the Operation is set to Composite.
    • Adjust the Gravity to position your watermark/overlay as desired (e.g., SouthEast for a bottom-right watermark).
    • Experiment with Blend Mode and Tile options to achieve the desired visual effect.
  4. Execute the workflow: Click "Execute Workflow" to run it.
  5. View Results: The output of the "Edit Image" node will contain the merged image, which you can then download or pass to subsequent nodes for further processing (e.g., saving to cloud storage, sending via email).

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