Full-featured documentation portal with sample code
As our blog outgrew its initial format, we decided to take it to the next level and created a full-featured documentation portal containing lots of information regarding PDF, explained with practical...
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Web API for PDF processing
IntroductionNew development challenges continuously call for yet another things to be done to circumvent the tricky limitations all big name platform providers impose on us for whatever reasons....
View ArticlePDF 2.0 specification overview
As you probably know the PDF 2.0 specification has been recently released and it introduced many long awaited features as well as deprecated some stuff. Here we would like to highlight the changes, so...
View ArticleGovernment issued smart cards and PDF documents signing
Many EU and non-EU governments and organizations are now issuing so-called e-legitimations, e.g. SuisseID / MobileID in Switzerland, BankID / MobileID / National ID in Nordic countries, ID cards in...
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Apitron PDF Kit Extensions Update: Text Watermarks
Introduction In our previous post we announced the release of the open source extensions library for Apitron PDF Kit. We continue making code contributions to this project, so recently a pack of...
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Open source Apitron PDF Kit extensions library
IntroductionApitron PDF Kit is an outstanding library for all kinds of tasks related to PDF, it offers well-designed and balanced API that follows the specification as much as possible at the same time...
View ArticleSigning pdf documents with smartcards using cryptoapi or PKCS#11...
Signing with smartcards might be challenging as they usually restrict private key export and only allow signing via own custom api, integrate with existing cryptoserviceproviders (windows cryptoapi) or...
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How to programmatically delete, edit or replace content in PDF documents
IntroductionReplacing, editing or deleting content from PDF documents programmatically is not a trivial task and requires expert knowledge of the format and internal structures to be implemented from...
View ArticleLong-term validation of signatures in PDF documents or LTV enabled signatures
Long-term validation of signatures in PDF documents is a mechanism to check that the signature and all related certificates are still valid at the time of checking (opening the doc) without making any...
View ArticleProcess and manipulate PDF content using Apitron PDF library
Dear Customers,we wish you a happy new year and will continue to provide the best PDF tools and support on the market. Thanks for choosing our products and your invaluable feedback. Should you have any...
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Convert PDF to tiff using custom bitonal image conversion
Introduction Sometimes default PDF to TIFF conversion doesn't provide the desired results, especially if it comes to black and white tiffs, containing so-called bitonal images. We've recently added a...
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Convert PDF to TIFF using custom rendering settings
IntroductionThe task to convert from PDF to TIFF format can sometimes be tricky and quite challenging if you don’t have the right tool for that. Our Apitron PDF Rasterizer for .NET component has been...
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Introduction to FDF or Forms Data Format
IntroductionAll of you probably have seen or filled PDF forms while submitting tax reports, registration data and so on. PDF offers more than enough to support forms based workflow and to make data...
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How to render and display PDF layers using advanced rendering settings
IntroductionSometimes you need to display only a part of the actual content contained on the PDF doc’s page, or maybe just working on a custom PDF viewer with support for layers for different types of...
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Adding image and text annotations to PDF documents, an interactive WPF PDF...
IntroductionPDF annotations became the natural way to amend existing PDF documents, be it reviewer’s notes, stamps or just custom images like approval marks. Natively supported they provide an easy and...
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Setting custom properties for PDF signatures
IntroductionSoftware modules that digital signatures of the PDF file are called Filters (signature handlers) in PDF terms. There are a few existing filters e.g. Adobe.PPKLite or Adobe.PubSec.When the...
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How to convert PDF to HTML (C# sample)
IntroductionWhile PDF itself is a perfect format for storing documents, sometimes you might be interested in converting it to HTML for various reasons, e.g. for implementing quick presenter capable to...
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Convert PDF to image using ICC color profile for CMYK to RGB transformation
IntroductionPrinting industry has many standards and modern printing devices actually operate with colors using specific colorspaces different from well-known sRGB or AdobeRGB. One of the widely used...
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How to add free text annotation with custom appearance to PDF page
IntroductionPDF specification defines many annotation types suitable for various purposes, just to name a few: Link annotation, Text annotation, Line, Square and Polygon annotations, Watermark...
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How to find and highlight links in PDF documents
IntroductionIf you create a custom viewer for PDF documents, then you could try Apitron PDF Rasterizer library that has unique features designed specifically to meet the needs of custom viewer writers....
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