GroupDocs.Search delivers enterprise-grade full-text search, document indexing, and text extraction to help teams create a fast, accurate search experience across PDFs, Office files, images (OCR), emails, archives, and more. Build end-user search features, create text indexes for quick document search, and keep results fresh with high-performance index updates.

• Recent updates improve OCR-backed indexing, faster spell correction, and refined fuzzy search defaults.
• New guidance on distributed search networks and image-hash indexing for reverse image search.
• Expanded examples for regular expressions, homophone search, and keyboard layout correction.

High-performance APIs for full-text search, indexing, and highlighting on .NET Framework and .NET Core.

• GroupDocs.Search-for-.NET: Core API for indexing, spell check, fuzzy/regex/boolean search.
  Repository: https://github.com/groupdocs-search/GroupDocs.Search-for-.NET
• Showcases: ASP.NET MVC UI demonstrating search and highlighting.
  Examples: https://github.com/groupdocs-search/GroupDocs.Search-for-.NET/tree/master/Showcases/GroupDocs.Search-UI

string indexFolder = @"c:\MyIndex\";
string documentsFolder = @"c:\MyDocuments\";

// Create index and add documents
Index index = new Index(indexFolder);
index.Add(documentsFolder);

// Regular expression search: two or more identical chars at word start
SearchResult result = index.Search("^^(.)\\1{1,}");

Native Java API for indexing, fuzzy search, regex search, and OCR-backed text search.
Repository: https://github.com/groupdocs-search/GroupDocs.Search-for-Java

com.groupdocs.search.Index index = new com.groupdocs.search.Index("indexDir");
index.add("docsDir");
com.groupdocs.search.results.SearchResult result =
    index.search("keyboard layout correction", new com.groupdocs.search.options.SearchOptions());

Cross-platform bindings to integrate full-text search into scripting and server workflows.
Repositories:

• Python via .NET: https://github.com/groupdocs-search/GroupDocs.Search-for-PythonNet
• Node.js via Java: https://github.com/groupdocs-search/GroupDocs.Search-for-Node.js-via-Java

• Enterprise content search across mixed formats with text indexing and OCR.
• Compliance & legal discovery: highlight hits, export results, filter by metadata.
• Knowledge bases & customer support search with typo-tolerant and synonym search.
• E-discovery and audit: date/number range queries, faceted search, and filtering.
• Media libraries: reverse image search using indexed image hashes.

• 80+ formats, OCR-backed text extraction, metadata indexing, and custom extractors.
• Create text indexes in memory or on disk; update, merge, optimize, and compact indexes.
• Flexible search modes: simple, boolean, regex, fuzzy, wildcard, phrase with wildcards, faceted search.
• Spell check, keyboard layout correction, homophone search, and synonym search.
• Indexing controls: stop words, blended characters, whole-word characters, character replacement.
• Distributed search network support for load-balanced queries across indexes.
• Save extracted text with configurable compression; filter documents during indexing.
• Highlight results per document or per segment; search across multiple indexes simultaneously.

• .NET: Install-Package GroupDocs.Search or dotnet add package GroupDocs.Search
• Java: Add the GroupDocs.Search dependency from Maven Central.
• Run sample projects from the repositories above to index documents and execute search queries.

• Documentation and tutorials: https://docs.groupdocs.com/search/
• Free support forum: https://forum.groupdocs.com/c/search
• Temporary license for full-feature evaluation: https://purchase.groupdocs.com/temporary-license

groupdocs-search document-indexing full-text-search search-text-in-document create-text-index quick-document-search regex-search fuzzy-search synonym-search ocr-search reverse-image-search enterprise-search metadata-search spell-check-search