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Download C# Library for Metadata Processing via .NET API

GroupDocs.Metadata for .NET API can be consumed as Metadata viewer for CRUD operations. It helps developers to read, write, edit and remove meta information from all popular document file formats. It gets the file as input, access the file property information and allows users to perform metadata operations for locating this specific document file easily for future reference.

Release Notes Download

Get Started

Open NuGet package manager, search for GroupDocs.Metadata and install. You may also use the following command from the Package Manager Console.

Install

To install please execute Install-Package GroupDocs.Metadata from Package Manager Console in Visual Studio to fetch & reference GroupDocs.Metadata assembly in your project.

PM>

     Install-Package GroupDocs.Metadata

Update

If you already have GroupDocs.Metadata for .Net and want to upgrade it, please execute Update-Package GroupDocs.Metadata to get the latest version.

PM>

     Update-Package GroupDocs.Metadata

Manage Document Metadata using .NET API

Important Note: Starting from 24.4.0, the GroupDocs.Metadata package has been split into two distinct platform packages: .NET Standard and .NET Framework. The GroupDocs.Metadata package is specifically designed to support the .NET Standard platform, making it compatible with .NET Core, .NET 5, .NET 6, etc. It includes backward compatibility improvements, allowing it to function with .NET Framework versions starting from 4.7.2. In addition, we have introduced the GroupDocs.Metadata.NETFramework package, which is optimized to run seamlessly in the .NET Framework runtime because it includes all the GroupDocs product libraries in their respective .NET Framework versions. It is tailored specifically for .NET Framework users and offers better dependency resolution for those utilizing the .NET Framework. We hope these changes will enhance your experience and provide a more streamlined approach to using the GroupDocs.Metadata package. If you have any further questions or concerns, please don’t hesitate to reach out to our free support forum.

GroupDocs.Metadata for .NET is a powerful API for extracting, editing, and removing metadata from a wide variety of document formats including PDFs, Word files, images, and more. It supports common metadata standards like XMP, EXIF, and IPTC, allowing users to manage metadata for text, image, audio, and video files effortlessly. The API also provides extended capabilities such as handling password-protected documents, detecting digital signatures, and extracting hidden metadata properties. Whether you need to clean metadata for privacy or update properties for better document organization, GroupDocs.Metadata streamlines the process with a few lines of code.

Metadata Features

Reading, Updating, and Removing Metadata

Read Metadata – Retrieve metadata information from supported document formats.
Update Metadata – Modify or update existing metadata properties in documents.
Remove Metadata – Clean sensitive information by removing metadata from documents.

Tag-Based Metadata Management

Manage with Tags – Organize and identify metadata properties using tags.
Extract by Tag – Retrieve metadata based on specific assigned tags.
Add Tags – Assign custom tags to metadata for easier management.
Remove Tags – Delete tags from metadata properties.

Password-Protected Documents

Access Protected Files – Open, edit, and extract metadata from password-protected documents.
Encrypted Metadata Handling – Safely work with metadata inside encrypted or secured files.

Hidden Metadata Extraction

Extract Hidden Metadata – Detect and retrieve hidden metadata elements embedded in documents.
Analyze Hidden Data – Inspect metadata not visible in standard document properties.

Format Detection and MIME Identification

Auto Format Detection – Automatically detect the file format for accurate metadata extraction.
MIME Type Identification – Determine the MIME type of documents for correct metadata handling.

Media Metadata Management

Audio Files – Extract and manage metadata (duration, bitrate, codec, etc.).
Image Files – Work with image metadata such as resolution, EXIF data, and color profiles.
Video Files – Manage video metadata including frame rate, resolution, and encoding details.

Advanced Metadata Extraction

By Type – Extract metadata by type (e.g., author, creation date).
By Regex – Use regular expressions to find metadata matching custom patterns.
By Tag – Retrieve metadata properties marked with specific tags.

Selective Metadata Removal

Targeted Removal – Remove only selected metadata properties like author or modification date.

Adding and Updating Metadata

Add Properties – Insert new metadata properties into documents.
Update Properties – Modify existing metadata fields.

Traversing Metadata Trees

Tree Navigation – Browse through complex metadata trees to find or edit specific properties.

Exporting Metadata

To Excel – Export metadata to Excel format for reporting and analysis.
To Other Formats – Export metadata to XML, JSON, or CSV for easy sharing.

Standards Compliance

Metadata Standards Support – Work with metadata following Dublin Core, XMP, IPTC, and other standards.

Custom Tags and Properties

Custom Metadata Management – Add, edit, or remove custom tags and properties for tailored use cases.

Read & Write Metadata Formats

Microsoft Word: DOC, DOCX, DOCM, DOT, DOTX, DOTM, RTF, TXT
Microsoft Excel: XLS, XLSX, XLSM, XLSB, XLTM, XLT, XLTX, XLAM, SXC, SpreadsheetML
Microsoft PowerPoint: PPT, PPTX, PPTM, PPS, PPSX, PPSM, POT, POTX, POTM
Microsoft Visio: VSD, VSDX, VSDM, VDX, VDW, VSS, VSSX, VSSM, VSX, VST, VSTX, VSTM, VTX
Microsoft Project: MPP
Microsoft Outlook: MSG, EML, EMLX, PST, OST
Microsoft OneNote: ONE
OpenDocument Formats: ODT (text), ODS (spreadsheets)
Portable Documents: PDF
Adobe Photoshop: PSD
AutoCAD Drawings: DWG, DXF
Images: JPG, JPEG, JPE, JP2, PNG, GIF, TIFF, WebP, BMP, DJVU, DJV, DICOM, CR2
Metafiles: EMF, WMF
Fonts: OTF, OTC, TTF, TTC
Audio: MP3, WAV
Video: AVI, MOV, QT, FLV, MKV
Matroska Media Containers: MKV, MKA, MK3D, WEBM
vCard Files: VCF, VCR
eBooks and Others: EPUB, TORRENT, ASF
3D Models: 3DS, FBX, STL, DAE
Archives: ZIP, 7Z, RAR, TAR

See detailed list of file formats.

System Requirements

GroupDocs.Metadata for .NET requires no external software. It supports 32-bit and 64-bit operating systems with .NET or Mono installed.

Supported Operating Systems

Windows: Server 2003/2008/2012/2016/2019, Vista, XP, 7, 8, 8.1, 10, Azure
Linux: Ubuntu, OpenSUSE, CentOS, and others
Mac: macOS

Supported Frameworks

.NET Frameworks: 2.0, 3.5, 4.0, 4.0_ClientProfile, 4.5.x, 4.6.x, 4.7, 4.7.2
.NET Standard: 2.0
.NET Core: 2.0, 2.1
Mono: 2.6.7 or later

Development Environments

Visual Studio (2010-2019)
Xamarin (Android, iOS, Mac)
MonoDevelop 2.4+

Installation

To install GroupDocs.Metadata for .NET via NuGet:

Using Package Manager GUI

Open your project in Visual Studio.
Go to Tools → NuGet Package Manager → Manage NuGet Packages.
Search “GroupDocs.Metadata” and click Install.

Using Package Manager Console

Open Package Manager Console in Visual Studio.
Run: Install-Package GroupDocs.Metadata.

GroupDocs.Metadata will be added to your project.

Extract Basic Document Metadata using GroupDocs.Metadata for .NET

Learn how to extract essential metadata like file format, number of pages, and document size using GroupDocs.Metadata for .NET. Simplify metadata extraction in your .NET applications.

// Example: Extracting basic document metadata using GroupDocs.Metadata for .NET

// Load the document from the specified path
using (Metadata metadata = new Metadata(Constants.InputXlsx))
{
    // Check if the file format is recognized
    if (metadata.FileFormat != FileFormat.Unknown)
    {
        // Get document metadata information
        IDocumentInfo info = metadata.GetDocumentInfo();
        
        // Output the extracted metadata details
        Console.WriteLine("File format: {0}", info.FileType.FileFormat);
        Console.WriteLine("File extension: {0}", info.FileType.Extension);
        Console.WriteLine("MIME Type: {0}", info.FileType.MimeType);
        Console.WriteLine("Number of pages: {0}", info.PageCount);
        Console.WriteLine("Document size: {0} bytes", info.Size);
        Console.WriteLine("Is document encrypted: {0}", info.IsEncrypted);
    }
}

Remove Specific Metadata Properties from Documents

Discover how to remove specific metadata properties such as document author or editor from your files using GroupDocs.Metadata for .NET. Enhance your file privacy by removing unwanted metadata.

// Example: Removing specific metadata properties using GroupDocs.Metadata for .NET

// Load the document from the specified path
using (Metadata metadata = new Metadata(Constants.InputDocx))
{
    // Remove metadata properties based on specified criteria (e.g., author, editor, or containing "John")
    var affected = metadata.RemoveProperties(
        p => p.Tags.Contains(Tags.Person.Creator) ||
             p.Tags.Contains(Tags.Person.Editor) ||
             (p.Value.Type == MetadataPropertyType.String && p.Value.ToString().Contains("John"))
    );
    
    // Output the number of properties removed
    Console.WriteLine("Properties removed: {0}", affected);

    // Save the changes to the document
    metadata.Save(Constants.OutputDocx);
}

Direct Download

GroupDocs.Metadata for .NET 25.8 (DLLs only)

This ZIP file contains only the GroupDocs.Metadata for .NET assemblies. The asse...

Added: 4/8/2025 Downloads: