Last updated on January 6th, 2023 at 10:07 pm
Very simple web toolbox to combine, compress, split PDF, and convert between images and PDF, change contrast of PDF, and add text watermark on PDF using Ghostscript and ImageMagick.
Step 1
Before we start, please ensure you have Docker installed. This can be installed through the Synology Package Center.
Step 2
We now need to create the Web PDF Toolbox Docker folder. Head into File Station and open the Docker folder. Select Create, choose Create folder and name it webpdf.

Step 3
We will now head into Control Panel > Task Scheduler > Create > Scheduled Task and click User-defined script. (see demonstration)

Step 4
In the window that appears, insert the following:
In the General tab, In the Task field, enter WebPDF. From the User list, select root. Uncheck the Enabled option.
In the Schedule tab, Select Run on the following date (make sure It’s today’s date). Now select Do not repeat.
In the Task Settings tab, under Notification, You can choose to turn this on, otherwise skip this. Now copy-paste the following code into the Run command area. Now click OK.
docker run -d --name=webpdf \
-p 19131:80 \
-e PUID=1026 \
-e PGID=100 \
-e TZ=Europe/London \
-v /volume1/docker/webpdf:/tmp/pdf/ \
--restart always \
zpex/web-pdf-toolbox
Important: Remember to update the PUID, PGID, TZ and directories to match your own.
Step 5
When the below warning appears, press OK.

Step 6
You will now see your list of tasks. Select WebPDF, now press Run.

Step 7
When asked to run, press Yes.

Step 8
The installation process has now finished. Give it a few seconds to appear in your Docker list.

Step 9
Open your browser and enter the link to your new container http://synologyip:19131.
Important: This toolbox is not secure and should not be exposed publicly. If exposed, someone might be able to access recently uploaded documents. Please, only use this toolbox behind an authentication portal or on a LAN (and access it via VPN if needed).
Docker Compose and Portainer
If you would prefer to install with Docker Compose or Portainer, use the following code. You can also view a demonstration here.
version: '3.3'
services:
web-pdf-toolbox:
container_name: webpdf
ports:
- '19131:80'
environment:
- PUID=1026
- PGID=100
- TZ=Europe/London
volumes:
- '/volume1/docker/webpdf:/tmp/pdf/'
restart: always
image: zpex/web-pdf-toolbox
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