Digitally Sign JPG Documents in Java (Code Example)

Add Digital Signatures to JPG in Java

Add custom digital signatures to JPG documents in Java based on PFX certificate files. The all-in-one electronic signature API easily integrates with your Java application to give you a personalized document signing experience using a few lines of code.

Instantiate Signature with (JPG) as input document
Instantiate DigitalSignOptions object with certificate & password details
Call sign method of Signature class and pass DigitalSignOptions to it

Work with JPG Signature API

You require GroupDocs.Signature namespace to digitally sign documents in Java & J2SE applications. Use signature manipulation features to customize sign, search and signature verification processes, manage eSignature colors, styling and overall appearance.

Get the respective assembly files from downloads or fetch the whole package from Maven to add ‘Conholdate.Total` directly in your workspace.

Add Text Signatures to JPG in Java

Add customized text signature to a JPG document in Java using advanced text settings such as font color, size, name, text alignment and border adjustment.

Create a new instance of Signature class and pass input document
Instantiate the TextSignOptions object and specify text signature options
Call sign method of Signature class instance and pass TextSignOptions to it

eSign Remotely Located Documents

The document eSign API enables you to load & display remotely located documents from various cloud document storage sources such as stream, local disk, URL, FTP, Amazon S3, and Azure Blob storage. Using document information extraction feature - fetch the basic information about the source document file (JPG) along with extracting other valuable document information such as file type, file size, pages count, page height and width etc.

Add Image Signatures to JPG in Java

Using Conholdate.Total for Java - insert custom image as an electronic signature to a JPG document in Java. Add company logo, stamp icon or name using different colors and text effects.

Create a new instance of Signature class and pass input document to it
Instantiate the ImageSignOptions object and specify image signature options
Call sign method of Signature class instance and pass ImageSignOptions to it

Image Representation of Document Pages

Apply digital signatures to a wide range of document formats and generate the image representation of the already signed document pages in PNG, JPG or BMP formats. You can easily preview the complete document as a whole or choose to display some specific pages based on page numbers or page ranges.

Using advanced document previewing features - easily hide digital signatures from the signed documents while generating the document preview.

What is JPG file format?

JPEG, short for Joint Photographic Experts Group, is a highly utilized file format for storing and compressing digital images. Specifically, the JPG file format, a variant of JPEG, employs lossy compression techniques to reduce file size. This format is particularly well-suited for photographs and images containing intricate color gradients. Due to its wide support in image editing software and web browsers, JPG is a favored choice for online image sharing. Moreover, it boasts compatibility with various operating systems and devices, including smartphones, tablets, and digital cameras.

The key advantage of the JPG file format lies in its ability to compress image files while preserving reasonable image quality. This attribute facilitates the storage and dissemination of large collections of high-quality images without occupying excessive storage space or causing lengthy download times.

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Digitally Sign JPG in Java