IOsymbols.com is described as 'Generate PDF documents from JSON data'. There are nine alternatives to IOsymbols.com for a variety of platforms, including Online / Web-based, Self-Hosted solutions, Linux, PHP and SaaS. The best alternative is Document Cyborg. It's not free, so if you're looking for a free alternative, you could try Tcpdf or HTML2PDF. Other great apps like IOsymbols.com are PDFSwitch (Free Personal), Pdfcrowd (Paid), HTML PDF API (Paid) and RunPDF (Paid).
PDFSwitch is a high-quality, easy to implement HTML to PDF conversion API. Easily generate PDF invoices, tickets, reports and documents with HTML to PDF API. Lightning-fast service, rich features, code samples for Java, C#, PHP, Python, Ruby, Go, Nodejs.
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.
DocRaptor is a high-quality HTML to PDF API. DocRaptor can also be used to generate Excel files from simple HTML and CSS. DocRaptor uses HTTP POST requests to generate PDF and Excel documents, and can be used with a wide variety of programming languages.
Pod is a back-end application that provides an API for HTML to PDF conversion. We intend to create a platform for PDF files creation that makes it feasible for small companies to include PDF generation in its applications.