Convert Presentations to PDF in Java

As PDF is the popular portable document format, so there comes the need to convert documents of other formats to PDF. Today, we will see different ways to convert PPT, PPTX, or ODP presentations to PDF in Java. In an earlier post, we have seen how to convert presentations using C#.

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Generate Reports from JSON Data in Java

JSON is a formatted and readable data interchange format to transmit data with attributes. However, the large data in JSON format is not very presentable and easily understandable. We mostly need to convert the large JSON data into a presentable format. This article will guide you to convert JSON data into PDF report in Java using a simple template.

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Generate QR Code in C# to Sign Documents and Images

In this article, we will see how to programmatically add QR codes to electronically sign documents and images using C#. GroupDocs.Signature for .NET is the API to add QR codes in PDF files, word processing documents, spreadsheets, presentations, and images.

It supports various electronic signatures for a large list of supported file formats. Among the QR codes, it supports Aztec Code, DataMatrix Code, GS1 DataMatrix, GS1 QR, QR types. The API allows us to add QR codes to JPG/JPEG, PNG, WebP, BMP, GIF, SVG, CMX, and TIFF images and some more image file formats as well.

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Extract Data from Invoices and Receipts in Java

In the era of online businesses, the use of digital invoices and receipts has largely increased. Similarly, the efficient data extraction from these digital invoices is also demanding. In this article, you will be knowing how to extract data from PDF invoices or receipts programmatically in Java.

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Convert WebP to JPG, PNG, and PDF in Java

WebP images give transparency like PNG, animate like GIF, and the most important for any web developer is the smaller size than comparative quality JPG format. However, due to incompatibility issues or any other requirement, it is sometimes needed to convert the WebP image into JPG, PNG, or other formats.

While converting the WebP to JPG, PNG, or other formats, you can also apply color adjustments to the output images. You can change the contrast, brightness, and gamma of the resultant image. The Image can be flipped, rotated, apply watermarks, or get the grayscale image as the output.

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Image Comparison in C# to Spot the Differences

Whether you want to build an application with spot the difference feature or if you want to compare two images within any of your image processing .NET based applications, you are at the right place. After this article, you can easily compare JPG, PNG, BMP, or images with some other file formats. Without wasting time, let's compare images in C# using the .NET API for document and image conversion.

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GroupDocs.Total Discount Offer Ends January 31st

Offer Ends 31st Jan 2021 on GroupDocs.Total

New Year 2021 starts, but soon the big offer ends on January 31st.

GroupDocs offered 25% OFF on GroupDocs.Total for .NET and Java. The offer remains valid till 31st January 2021. Avail this offer before it ends.

Do not forget to use the HOLOFF2020 coupon code while ordering to avail this discount offer.

This offer is only available on new GroupDocs.Total purchases and cannot be used in conjunction with other offers, renewals, or upgrades. Only available directly from, not … Continue Reading

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Read PDF Form Fields using C#

In this article, we will learn how to read and parse PDF documents and then programmatically extract PDF form field values in C#. Earlier, we have seen how to extract values from PDF forms in Java. After reading these articles, if you have filled feedback forms, you can extract the values within your .NET & Java applications for analysis or save them in the database.

Parse PDF Forms to Extract values in C#

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Add Watermark to Images using C#

Add Text Watermark to PNG image using Java and .NET

Let's see today, how to add watermarks to images. This helps you branding your official photography, and protects your pictures from any unauthorized use. This article will guide you to programmatically add text and images watermarks to your image files using C#. In an earlier post, we have seen the same to add text and image based watermarks to images using Java. After reading this article, it will not be difficult for you to add watermarks to JPG/JPEG, PNG, WebP, GIF, TIFF, JP2, BMP images using C# within your .NET application.

Let's now separately see, how we can easily add text and image-based watermarks on your pictures, photos, or image files in C# using the .NET Watermarking API for documents and images.

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