pdflayer - Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.
Aspose.PDF for Java - Aspose.Pdf is a Java PDF component to create PDF documents without using https://alternativeto.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents
IronPDF - SDK for creating and editing PDFs.
HTML2PDF.fr - HTML2PDF is a HTML to PDF converter that allows the conversion of valid HTML 4.