Download Dompdf – HTML to PDF Conversion Library for PHP

Dompdf is a free, open-source HTML-to-PDF converter written in PHP. It parses HTML and CSS markup and renders it into PDF documents, making it one of the most popular choices for generating PDFs dynamically in PHP web applications — such as invoices, reports, receipts, and order confirmations.

Dompdf supports a broad subset of HTML5 and CSS 2.1 (with some CSS3 features), including floats, tables, list styles, background images, and web fonts. It uses a built-in PDF rendering engine and optionally leverages the GD or Imagick PHP extension for image processing, and the php-font-lib for custom web font support.

It can be used as a standalone library, integrated via Composer into any PHP project, or embedded into frameworks like Laravel, Symfony, and CodeIgniter. Dompdf is straightforward to implement — just a few lines of PHP are needed to convert any HTML string or file into a downloadable PDF.

Key Features

• HTML and CSS rendering – Supports HTML5 structure and CSS 2.1 including floats, tables, margins, padding, and backgrounds.
• Web font support – Embed custom fonts (TTF, OTF) into generated PDFs via php-font-lib integration.
• Image embedding – Inline images (PNG, JPEG, GIF, SVG) are embedded directly into the output PDF.
• Composer integration – Install via Composer with composer require dompdf/dompdf for easy dependency management.
• Stream or save output – Output PDFs directly to the browser as a download, inline preview, or save to disk.
• Paper size and orientation – Configurable page size (A4, Letter, etc.) and portrait/landscape orientation.
• Framework compatibility – Works with Laravel, Symfony, CodeIgniter, and any PHP project via Composer.

How to Install

1. Install Dompdf via Composer: composer require dompdf/dompdf in your PHP project root.
2. Include the Composer autoloader in your PHP file: require_once 'vendor/autoload.php';
3. Import and instantiate Dompdf: use Dompdf\Dompdf; $dompdf = new Dompdf();
4. Load HTML content: $dompdf->loadHtml('<h1>Hello PDF</h1>'); and render: $dompdf->render();
5. Output the PDF to browser: $dompdf->stream('output.pdf'); — the browser will download or display the generated file.