How Back-Office Teams Keep One-Off Document Jobs Out of the Full Merger API

Reporting packs, contract amendments and one-slide handoffs rarely need a full merge API. GroupDocs.Merger.LowCode turns each of those jobs into a single C# constructor call, with seven products built for exactly one operation each.

Stop Trusting External Resources in Merged HTML - GroupDocs.Merger for .NET

Learn how GroupDocs.Merger for .NET denies external resources in merged HTML by default since 26.10. This guide covers the new LoadOptions defaults, IExternalResourceHandler, and WhitelistedResources, with working code.

GroupDocs.Total for Python 26.11 – November 2026 Release Highlights

Version 26.11 introduces five new products and broadens Python and OS support.

Sign PDFs in .NET with a Key That Never Leaves HashiCorp Vault

Learn how to sign PDFs with GroupDocs.Signature for .NET while the private key stays in HashiCorp Vault. The guide covers the ICustomSignHash signer, the certificate for a Vault key, a least-privilege Vault policy and key rotation, with working C# code.

GroupDocs.Assembly for Python 26.11 – November 2026 Release Highlights

GroupDocs Assembly for Python 26.11 introduces cross‑platform wheels, Python dict/list data sources, new API changes, and improved error handling.

GroupDocs.Comparison for Java 26.11 – November 2026 Release Highlights

GroupDocs.Comparison for Java 26.11 adds OCR-based image comparison, matches spreadsheet rows by content, makes spreadsheet comparison take seconds instead of minutes, lays out PDF results from the source page and fixes text, Word, presentation and HTML preview issues.

Build a browser annotation UI on GroupDocs.Annotation — no Angular required

The library reads and writes markup inside documents and draws nothing on a screen. That leaves one question for everyone who adopts it — how does a person actually draw the annotation? About 250 lines of plain JavaScript and six endpoints.

GroupDocs.Conversion for Java 26.10 – October 2026 Release Highlights

Release 26.10 adds ISO/UUE archive conversion, HEIC image handling, metadata removal, and key bug fixes for GroupDocs.Conversion Java.

GroupDocs.Parser for Python 26.10 – November 2026 Release Highlights

Version 26.10 introduces annotation extraction, OCR for Arabic/Korean, HTML table support, a command‑line tool, and pure‑Python wheels.

How to annotate a PDF in C#: highlight, comment, reply and extract

The shortest honest answer to ‘how do I annotate a PDF in C#?’ — seven calls, the two coordinate conventions that decide where the markup lands, and the one line a Linux container needs.