Tutorials
Practical, real-world guides for developers — essential workflows broken down into clear steps, with ready-to-use code you can drop into your project.
Remove Password Protection from Archived PDFs with Ruby
Batch remove password protection from PDF documents using Ruby when you have the known password. Ideal for migrating protected archives to new systems or simplifying access to legacy documents protected with standard organizational passwords.
4 min read
Extract PDF Metadata for Document Management with Java
Read PDF metadata including page count, file size, author, and encryption status using Java. Build smarter document catalogs, enable advanced filtering, and detect protected files automatically for your document management system.
4 min read
Compress Large PDFs for Email Attachments with Node.js
Reduce PDF file sizes before sending email attachments using Node.js and the Apdf Compress API. Avoid bounced emails, improve deliverability, and save bandwidth with automatic compression that can shrink files by 50-90%.
6 min read
Generate PDF Thumbnails for Document Previews with Go
Build a document preview system by converting PDF pages to thumbnail images using Go. Learn how to generate fast, lightweight previews for file browsers and document management systems without heavy local dependencies.
6 min read
Convert Scanned PDFs to Searchable Documents with Python
Transform image-based scanned PDFs into fully searchable documents using Python and the Apdf OCR API. Perfect for digitizing paper archives, enabling text selection, and making legacy documents ready for modern search systems.
4 min read
How to Send "Embedded" PDF Invoice Previews in Emails (using Images)
Learn how to embed PDF invoices directly in HTML emails by converting the first page to an image. Since email clients don't support embedded PDFs, this technique uses the Apdf API to create visual invoice previews that increase engagement and trust with your customers.
8 min read
Generate PDF Event Tickets with QR Codes in A6 Format using Go
Learn how to generate A6-sized event tickets with embedded QR codes using Go. This tutorial focuses on small-format PDFs (tickets, badges, labels) using CSS print media and the Apdf API. Perfect for event management systems, concerts, and conferences where scanning and compact printing are essential.
8 min read
Fix Sideways PDF Scans: Auto-Rotate Pages with Python
Learn how to automatically fix sideways or upside-down PDF pages from mobile uploads. Using Python and the Apdf Rotate API, you can detect and correct orientation issues in scanned documents, making them ready for review workflows.
6 min read
Add Company Letterhead to Existing PDFs
Learn how to retrofit company branding onto legacy PDF reports by sliding a letterhead design behind the existing content. Using Ruby and the Apdf Underlay API, you can batch-process thousands of documents without regenerating them.
5 min read