To extract text in Syncfusion PDF viewer, you can use the isExtractText property and extractTextCompleted event.This allows you to extract the text from a page along with the bounds.
Here is an example of how you can use the isExtractText property and extractTextCompleted event:
viewer.isExtractText = true;
viewer.extractTextCompleted = args => {
//Extract the Complete text of load document
console.log(args);
console.log(args.documentTextCollection[1]);
//Extract the Text data.
console.log(args.documentTextCollection[1][1].textData);
//Extract Text in the Page.
console.log(args.documentTextCollection[1][1].pageText);
//Extracts the first text of the PDF document along with its bounds
console.log(args.documentTextCollection[1][1].textData[0].Bounds);
};Find the sample how to extract Text