Step 1: Install the plugin in Bubble

1️⃣ Install the Print Fast plugin in your Bubble application.

2️⃣ In the Bubble editor, use one of the plugin's actions in your workflows:

Print Fast - Manual (Desktop)

Print Fast - Manual (Mobile)

Print Fast - Automatic

These actions are responsible for sending print data to Print Fast.


Step 2: Install the extension in Google Chrome


1️⃣ Install the Print Fast extension in the end user's Google Chrome:

https://chromewebstore.google.com/detail/print-fast/immekiicddpbklgenccdmakopgggfeom

2️⃣ Open the extension and enter the user's authentication key, generated at:

https://printfast.app

3️⃣ Save the configuration to enable printing.

Important — User ID:

In the extension, enter the combination of the application domain with the user's User ID (Unique ID), automatically generated by Bubble and stored in the User database.

Example:

Application domain + User ID (Unique ID)
User ID field: mydomain1766954008145x263727117268990560

Each user must use the combination of the application domain + their User ID (Unique ID) generated by Bubble.


Step 3: Install the Print Fast application on Windows


1️⃣ Install and run the Print Fast application for Windows on the computer where the thermal printer is connected

2️⃣ Verify that the printer is correctly installed on a dedicated COM port and that this port is not being used by another printer.


Step 4: Desktop Printing


1️⃣ Use the Print Fast - Manual (Desktop) action in the Bubble workflow.

The user controls when the printing will be executed.

No browser print window is displayed.


Step 5: Mobile Printing


1️⃣ Use the Print Fast - Manual (Mobile) action in your Bubble workflow.

2️⃣ This mode allows print requests triggered from mobile devices (Android or iOS).

3️⃣ The print is forwarded to the Print Fast Windows application, which executes the printing automatically on Windows.

No browser print dialog is displayed.


Step 6: Automatic Printing


1️⃣ Use the Print Fast – Automatic action in the Bubble workflow.

2️⃣ For this mode, it is necessary to configure a webhook in your N8N.

It is recommended to use N8N in a self-hosted environment, avoiding costs with automatic calls.

There is no API key consumption.


⚠️ Important Requirements


Compatible only with Windows

Works only with thermal printers configured on a COM port.

Does not work with printers connected only via USB without a virtual COM port.

Requires the installation of the Bubble plugin, the Chrome extension, and the Windows application.