Formfeed
Render PDFs and images from HTML (Jinja2, Liquid, Handlebars) or Word templates, with a free tier

HTML/URL to PDF.
Html2PDF API is a free Documents & Productivity API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
High-quality HTML to PDF conversion API service. Easy API integration, browser-based PDF engine, asynchronous request and much more
Details from html2pdf.app.

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Render PDFs and images from HTML (Jinja2, Liquid, Handlebars) or Word templates, with a free tier
Convert, merge, split, extract text and add page numbers for PDFs. Free for 250 documents/month
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The Html2PDF API is provided by html2pdf.app (html2pdf.app). High-quality HTML to PDF conversion API service. Easy API integration, browser-based PDF engine, asynchronous request and much more
Yes. The Html2PDF API is listed in the Documents & Productivity category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Html2PDF API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the Html2PDF API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Html2PDF API is served over HTTPS, so it's safe to use in production.