Transparent tracking pixel for email open detection
Description This workflow serves a 1x1 transparent PNG image via a webhook, which can be embedded in an email to track when the email is opened. When the image is loaded by the recipient's email client, the webhook is triggered, optionally capturing a userId to identify who opened the email. ๐ Workflow Steps 1. Webhook Trigger (Request img) - Path: /webhook/change-with-your-id - Triggered by an HTTP request (e.g. when the image is loaded in an email). - Accepts a query parameter id to identif
At a glance
Transparent tracking pixel for email open detection is a ready-made n8n workflow you import as a workflow JSON file โ no build required. It connects UNSUPPORTED_SLUG_FORMAT. It's free to download. Follow the 5-step import below to go live in minutes.
- Platform
- n8n
- Connects
- UNSUPPORTED_SLUG_FORMAT
- Modules
- 5
- Price
- Free
- Version
- v1.0

About this workflow
Description This workflow serves a 1x1 transparent PNG image via a webhook, which can be embedded in an email to track when the email is opened. When the image is loaded by the recipient's email client, the webhook is triggered, optionally capturing a userId to identify who opened the email. ๐ Workflow Steps 1. Webhook Trigger (Request img) - Path: /webhook/change-with-your-id - Triggered by an HTTP request (e.g. when the image is loaded in an email). - Accepts a query parameter id to identify the recipient. 2. Set Base64 Data (Create data pix) - Creates a variable data containing a Base64-encoded transparent PNG image (1x1 pixel). 3. Convert to Binary (Create img bin) - Converts the Base64 data string into a binary file. - Sets MIME type to image/png. 4. Respond to Webhook (Respond to Webhook) - Sends the binary image file in the HTTP response. 5. Logging (Do anything to log) - Placeholder node to log or process the id or request metadata. - You can access the id using {{$json["query"]["id"]}}. - You can also use any parameter you want โ๏ธ How to Use in Emails Embed the image in an HTML email like this: When the email is opened and the image is loaded, the workflow will be triggered. ๐ ๏ธ Notes - Some email clients block images by default; this may prevent tracking. - You can enhance the workflow to store open events in a database, log the timestamp, IP, or user agent. - Make sure to comply with data privacy and consent regulations (e.g. GDPR).
How to import this n8n workflow
- 1
Download the workflow JSON file after purchase.
- 2
Open n8n โ click the menu โ Import from File.
- 3
Select the downloaded JSON and import.
- 4
Set up credentials for each node that requires them.
- 5
Click Execute Workflow to test, then activate.
Setup guide
Setup guide included
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