Based on our record, PDFCrowd seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
To follow on with this, I've used https://pdfcrowd.com/ too. Source: about 3 years ago
SellerApp - Seller App’s Smart-Data helps for Amazon Growth, Calculate Profits, PPC Campaigns, In-depth Keywords & Product Research, Analyze Competition and more.
DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
AMZScout - AMZScout extension will help you make a decision about picking a niche based on the actual data, not intuition.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
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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.