> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/core/get-started/readme.md).

# Cross-Platform PDF Library for Server / Desktop

PDF library, document library for Server/Desktop allows you to create, annotate, edit, sign and do lot more with your PDFs.  The Apryse Server SDK streamlines secure document processing with robust su

The Apryse SDK is a comprehensive cross-platform PDF and Office SDK that allows you to write stand-alone, cross-platform and reliable commercial applications.

<a href="/core/get-started/get-started.md" class="button primary">Get started</a><a href="/core/get-started/samples.md" class="button primary">Samples</a><a href="/core/get-started/download.md" class="button primary">Download</a>

## New to Apryse SDK?

After you checked out the samples, gone through get started, here are some next step features.

[Basics operations](/core/basic-operations/basics.md) Basic operations include saving, loading, or multithreaded locking of a document.

[Viewer](/core/viewer/viewer.md) Display a document reliably and accurately on your platform.

[Annotation](/core/annotation/annotation.md) Markup and comment on documents without changing the documents original content.

[Forms](/core/forms/forms.md) Read, write, or edit forms using FDF (forms data format) or XFDF (XML FDF).

## More functionality

There is much more features to explore and here are just a few to look at next.

[MS Office](/core/ms-office/office.md) Convert MS office documents without any external third party software.

[Conversion](/core/conversion/conversion.md) Convert multiple file types to PDF or from PDF to multiple file types.

[Extraction](/core/basic-operations/extraction/extraction.md) Extract data such as text, images, fonts, metadata, and more from a document.

[Search](/core/search/search.md) Find text within the contents of a document.

## Specialized topics

Come here looking for something more specific? Here are some more features.

[Digital Signature](/core/digital-signature/signature.md) Secure a document with a signing fingerprint between sender and receiver.

[Redaction](/core/redaction/redaction.md) Permanently remove (and not just obscure) sensitive content.

[OCR](/core/ocr/ocr.md) Create searchable and selectable text from images.

[PDF/A](/core/pdf-a/pdfa.md) Convert generic PDFs to PDF/A or validate existing PDF/A documents.

[Page Manipulation](/core/page-manipulation/manipulation.md) Add, remove, rotate, reorder, split, or crop pages of a document.

[Editing Page Content](/core/pdf-editing/edit.md) Read, write, edit, or replace page content in a document.

[Bookmarks](/core/bookmark/bookmark.md) Link to sections or pages in a document for easier navigation.

## Advanced

We also have some advanced document processing features.

[Optimization](/core/optimization/optimization.md) Reduce file size, remove redundant information, and compress data in a document.

[Security](/core/security/security.md) Secure a document with user authorization and permissions on a document.

[Layers](/core/layer-ocg/layers.md) Groups of content that can be selectively made hidden or extracted.

[Print](/core/print/print.md) Overprint, imposition, or rasterize regions to be printed to a printer.

[Portfolios](/core/portfolio/portfolio.md) A dynamic file with a range of different file types assembled to an integrated PDF.

[Low-level PDF API](/core/low-level-pdf-api/low-level.md) Completely customize a PDF document.


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