Jollen Moyani for Syncfusion, Inc.

Posted on Mar 18 • Originally published at syncfusion.com on Mar 17

Large PDFs and Spreadsheets Slowing You Down? See What’s New in Syncfusion 2026 Volume 1

#fileformats #dotnet #developertools #documentprocessing

TL;DR: The Syncfusion 2026 Volume 1 release brings major performance and usability upgrades to the PDF Viewer, DOCX Editor, and Spreadsheet Editor SDKs. Key improvements include faster PDF page organization on the web; quicker Blazor text search; zoom persistence and custom stamp access in .NET MAUI; discontinuous chart ranges in the Spreadsheet Editor; full dashed/dotted border preservation in the DOCX Editor, and more. New Visual Studio extensions also streamline Blazor development.

Working with large PDFs, complex spreadsheets, or heavily formatted Word documents can quickly become slow and frustrating. When page organization lags, search takes too long, or formatting gets lost, productivity drops across teams that rely on document-heavy workflows.

The Syncfusion 2026 Volume 1 release addresses these challenges with targeted performance and usability improvements across the PDF Viewer, DOCX Editor, and Spreadsheet Editor SDKs.

These updates deliver:

Faster PDF page organization on the web
Significantly improved text search performance in Blazor
Better usability in the .NET MAUI PDF Viewer
More flexible charting in the Spreadsheet Editor
Accurate border style preservation in the DOCX Editor

The result is a smoother and more reliable editing experience across Web, Blazor, and .NET MAUI applications.

Let’s explore these improvements in detail

PDF Viewer SDK

The PDF Viewer SDK receives several high-impact improvements across Web, Blazor, and .NET MAUI platforms. These updates focus on performance, usability, and workflow efficiency.

Web PDF Viewer: Faster page organization for large documents

Industries that work with large PDFs often experience slowdowns when organizing pages.

For example:

Legal teams reviewing lengthy contracts
Engineering teams managing technical manuals
Finance departments working with large consolidated reports

As documents grow in size, opening the Organize Pages window can become slow or unresponsive, making page reordering or deletion tedious.

The Syncfusion Web PDF Viewer now opens and closes the Organize Pages window significantly faster, even when working with very large documents. These improvements eliminate UI lag and temporary freezes, giving users a smoother and more responsive page-management experience.

The following table shows the improvement in opening and closing times:

Document size	Opening improvement	Closing improvement
500 pages	51.3%	93.8%
1,000 pages	62.3%	93.2%
5,000 pages	85.7%	Fully responsive
10,000 pages	76.2%	Fully responsive

Blazor PDF Viewer: Performance improvements in text search

Fast and accurate text search is essential in many industries that handle large PDFs, including:

Legal teams navigating case files.
Research organizations analyze lengthy technical reports.
Engineering teams reviewing extensive specifications.

In these workflows, slow or inconsistent search performance can disrupt productivity, delay decision‑making, and make it difficult for users to quickly locate critical information across hundreds or even thousands of pages.

To ensure a smoother and more dependable search experience, the Syncfusion Blazor PDF Viewer now delivers significantly faster, more reliable text search, thanks to targeted engine optimizations and refined indexing. You can now locate words and phrases far more quickly and with consistent accuracy, even when working with very large PDF files.

The following metrics show reduced search times for documents of different sizes.

Document size	Performance improvement (%)
60 pages	95.4%
114 pages	95.8%
500 pages	97.1%
1,000 pages	96.8%
5,000 pages	94.3%

.NET MAUI PDF Viewer improvements

The .NET MAUI PDF Viewer also introduces several usability improvements that make document navigation easier on mobile and tablet devices.

Maintain zoom level in single-page view

Field teams often review large documents on tablets, including:

Construction inspection reports
Clinical documentation
Engineering diagrams

Constantly re-zooming when switching pages can slow down review workflows.

The .NET MAUI PDF Viewer now preserves the zoom level while navigating between pages in single-page view mode.

Once you set your preferred zoom level, it stays consistent across the entire document, allowing users to read detailed diagrams or text without repeated adjustments.

Refer to the following images.

Before enabling Zoom persistence:

After enabling Zoom persistence:

Access custom stamp annotation views

Many industries rely on status stamps such as Approved, Rejected, and Pending during document reviews. These are commonly used in:

Manufacturing inspections
Compliance reviews
Legal approvals
Healthcare verification workflows

All these require updating the status stamps after review and extracting who‑did‑what information for audit reporting. Once applied, custom stamp annotations were difficult to modify or automate, slowing down bulk updates and downstream reporting.

The .NET MAUI PDF Viewer now allows you to retrieve and manage the visual elements of custom stamp annotations after placement, enabling dynamic updates during review and approval workflows.

You can now:

Access stamp properties
Modify stamp appearance
Extract stamp information for reporting

This makes approval workflows easier to automate and track.

Custom stamp annotation views in .NET MAUI PDF Viewer

Blazor Smart PDF Viewer

The Blazor Smart PDF Viewer has now reached production readiness and includes several AI-powered capabilities.

These include:

Document summarizer: Provides AI-generated summaries and answers to user queries, enabling quick understanding of document content.
Smart redaction: Automatically detects and redacts sensitive information, ensuring accurate and secure content protection.
Smart fill: Automatically identifies and fills PDF form fields using AI, minimizing manual input and speeding up form completion.

Spreadsheet Editor SDK

The Spreadsheet Editor SDK also receives major improvements across Web and Blazor platforms.

Web Spreadsheet Editor improvements

Discontinuous chart range support

Teams in finance, research, project management, academics, and inventory operations often need to compare data series that live in completely different parts of a worksheet.

For example :

Revenue and expense metrics may sit in separate columns,
Regional performance data may be stored in different sections,
Project phase metrics may be spread across multiple tables, and
Experiment/control datasets may exist far apart due to differing collection workflows.

Until now, creating a comparison chart required copying data into a single block, building multiple charts, or restructuring worksheets, all of which break live data flow and add maintenance overhead.

With the new discontinuous chart range support in the Syncfusion web Spreadsheet Editor, you can create a single chart from multiple nonadjacent rows, columns, or cell blocks. Each selection becomes its own series; charts stay live and are linked to the source data.

The supported major chart types are: