Invented by Adobe Systems over 20 years ago, the Portable Document Format (PDF) is now an open standard for electronic document exchange maintained by the International Organization for Standardization (ISO). When you convert documents, forms, graphics, and web pages to PDF, they look just like they would if printed.

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PDF vs PNG file size: 726 PDFs and 763 images tested

We saved 726 public PDFs as PNG at 72, 150 and 300dpi. The PNGs were a median 5.7 to 40 times bigger. Here’s the data by content type.
Mark Stephens
10 min read

How to Edit a PDF in Java using JPedal (Tutorial)

Java has no built-in PDF support, so editing a PDF means picking a library. This tutorial covers PDF editing in Java with JPedal’s PdfManipulator, from page operations to redaction…
Jacob Collins
13 min read

What is PDF/A?

The PDF file format is a very big and complex standard so several more limited subsets have been created for specific purposes, of which...
Mark Stephens
3 min read

The Best PDF Inspector Tools for Developers

If you have ever opened a PDF in a hex editor at 2am trying to work out why a font is missing or why...
Jacob Collins
6 min read

How to make a PDF file manually

Table of Contents Intro: What a PDF Actually Is 1: PDF Objects and Data Types 2: Structure of a PDF File 3: Create a...
chika
15 min read

How to Read PDF files in Java (Step-by-Step Guide)

TL;DR Java has no native PDF support, so you need a library. Apache PDFBox is free and adequate for basic extraction, and iText adds...
Jacob Collins
5 min read