Fill out PDF forms in pure JavaScript, both in the browser or on the server.
pdfform.js can function with a slightly customized version of pdf.js. However, due to the size and scope of PDF.js (1600KB+), by default a built-in PDF library (called minipdf) is used.
The online demo demonstrates both (not recommended in actual production).
To use in a browser, download and serve either pdfform.minipdf.dist.js (minipdf, recommended) or pdfform.pdf_js.dist.js (pdf.js).
Alternatively, download/clone this repository and add minipdf.js and pdfform.js to your JavaScript files. You'll also need the pako library.
Simply call transform with the PDF file contents and the fields.
<!-- download from https://raw.githubusercontent.com/phihag/pdfform.js/dist/dist/pdfform.minipdf.dist.js -->
<script src="downloaded/pdfform.minipdf.dist.js"></script>
<script>
var pdf_buf = ...; // load PDF into an ArrayBuffer, for example via XHR (see demo)
var fields = {
'fieldname': ['value for fieldname[0]', 'value for fieldname[1]'],
};
var out_buf = pdfform().transform(pdf_buf, fields);
// Do something with the resulting PDF file in out_buf
</script>There is also a list_fields function which allows you to list all available fields and their types.
For more details, have a look at the demo and its JavaScript code.