Peardoc HTML to PDF API is described as 'HTML to PDF API:'. There are more than 10 alternatives to Peardoc HTML to PDF API, not only websites but also apps for a variety of platforms, including Linux, Mac, Windows and Self-Hosted solutions. The best alternative is wkhtmltopdf, which is both free and Open Source. Other great sites and apps similar to Peardoc HTML to PDF API are Document Cyborg (Paid), Prince XML (Free Personal), WeasyPrint (Free, Open Source) and Tcpdf (Free, Open Source).
wkhtmltopdf is an open source (LGPL) command line tools to render HTML into PDF and various image formats using the QT Webkit rendering engine. These run entirely "headless" and do not require a display or display service.
HTML2PDF is a HTML to PDF converter that allows the conversion of valid HTML 4.01 in PDF format, and is distributed under LGPL. This library has been made to assist in the creation of PDF files, not to directly convert an HTML page.