A Ruby gem that converts HTML and CSS into PDF documents using the wkhtmltopdf command-line utility.
PDFKit is a Ruby gem that converts HTML and CSS into PDF documents. It solves the problem of generating high-quality PDFs from web content by using the wkhtmltopdf command-line tool, which renders HTML with the WebKit engine to ensure accurate styling and layout.
Ruby and Rails developers who need to generate PDF reports, invoices, or documents from HTML templates within their applications.
Developers choose PDFKit for its simplicity and reliability, as it leverages the mature wkhtmltopdf tool to produce consistent PDFs from standard web technologies without requiring complex PDF libraries.
A Ruby gem to transform HTML + CSS into PDFs using the command-line utility wkhtmltopdf
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Leverages wkhtmltopdf with the WebKit engine to accurately convert HTML and CSS to PDF, preserving layouts and styles as seen in browsers, ensuring documents match web content.
Accepts HTML strings, local files, or URLs as input, making it versatile for generating PDFs from various content sources without rewriting templates.
Provides built-in middleware for Rails and Rack apps, allowing quick addition of PDF endpoints by appending .pdf to URLs, as shown in the setup examples.
Supports all wkhtmltopdf command-line options for page size, media type, cookies, and more, enabling fine-grained control over PDF output through configuration or meta tags.
Requires manual installation and configuration of wkhtmltopdf, which can be problematic on some systems, adds deployment complexity, and is noted as a common troubleshooting issue.
In single-threaded servers, PDF generation that requests resources from the same server can cause deadlocks, necessitating workarounds like running multiple workers, as warned in the troubleshooting section.
Often requires absolute paths or explicit root_url settings for CSS, images, and JavaScript, leading to missing resources in PDFs if not handled carefully, a frequent source of errors.