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.

PDF

No Startxref found in last 1024 bytes opening file…

A PDF file contains a couple of key pointers. One of them is a pointer to the start of the table which describes the...
Mark Stephens
44 sec read

How to identify a PDF file

The best way to identify a PDF file is to scan the first line of the file. In theory the first line of a...
Mark Stephens
49 sec read

JavaScript in PDF to HTML5 Conversion: Introduction

Recently we have begun development on converting the JavaScript contained within PDFs to JavaScript that can be used by any browser browsing the HTML5...
Lyndon Armitage
1 min read

Multiple trailers in a PDF file

TL;DR Multiple trailers allow for Incremental Updates in PDFs. New changes (data/objects) are appended to the file end, preventing a full rewrite. Each trailer...
Mark Stephens
2 min read

How do Browsers auto reverse the Right to left…

You might have encountered a situation where you tried to read from pdf or other text input streams and writing the raw data into...
suda
1 min read

Handling Floating Point coordinates with Pixels in SVG &…

Recently I have been working on a problem with SVG & the HTML5 Canvas that causes bad looking output in some of our files....
Lyndon Armitage
1 min read