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Demo: Write text on existing pdf
This demo shows how to add text to an existing pdf document. We created this certificate from an existing template in Microsoft Word, and saved as pdf file.
Enter your name in the input field below and execute demo to see results. The options used can be seen on the options tab.
When you are ready to start developing check out the documentation for our Pdf write string-service on /docs/pdf-services/pdf-write-string-api
This is the options object included in the api request. Please note that options displayed here may not be valid json, some values are written to explain how they are actually calculated in our backend demo code.
{
"text": inputtext.value, //value from input field on PfdTemplate tab
"textColor": {
"r": 43,
"g": 57,
"b": 144
},
"font": {
"name": "Pacifico", //Google font which is resolved by font service
"size": 30,
"style": 0 //Regular, 1 = Bold, 2 = Italic, 3 = BoldItalic
},
"pageNumber": 1,
"xPosition": -1 * 17 * inputtext.value.length / 2, //Calculate a negative offset based on average char width in font is 17, to center text on document
"yPosition": 50.0,
"xOrigin": 1, //1 = Horizontal origin is center of document, 0 = left and 2 = right
"yOrigin": 1, //1 = Vertical origin for yPosition is center of document, 0 = top and 2 = bottom
}
Click run demo buttons to see result
Calling PdfBroker.io api
