How to Add Page Numbers to a PDF File using PDF.co Web API

Step 1: Open PDF.co Account

• Let’s begin. First, let’s start by opening your PDF.co account and the Request Tester menu.

Step 2: Request Tester Page

• For Choose PDF.co API endpoint field, search and select v1/pdf/edit/add. This endpoint can add multiple pages in a single PDF.
• For the Input Parameters field, override the URL param with a link or input with a file.

Step 3: Enter JSON Code

Let’s add the JSON Code and set up the parameters

• For the Async param, will set it to false.
• For Encrypt param, set it to true.
• For the Inline param, set it to true.
• In the Name param, type in your desired output file name.

Let’s set up the Annotations param

• In the Text param, enter the macros {{$$PageNumber}} to automatically add page numbers in the PDF file.
• For X and Y params, add the coordinates where you want to add the page number. You can get the coordinates of your PDF file with our PDF/Edit/Add Helper.
• In the Size param, add the size of your page number.
• For the Pages param, enter 0- so we can add numbers to all pages in a PDF file.

{
"async": false,
"encrypt": true,
"inline": true,
"name": "Output_File",
"annotations": [
{
"text": "{{$$PageNumber}} ",
"x": 290,
"y": 7,
"size": 20,
"pages": "0-"
}
]
}

After setting up the code, click on the Run Request button to send a request.

Step 4: Result

• Great! We successfully run the request, kindly click on the URL to view the output, or directly download the output file.