---
title: "14.4.8 release notes"
canonical_url: "https://www.nutrient.io/guides/dotnet/release-notes/14-4-8/"
md_url: "https://www.nutrient.io/guides/dotnet/release-notes/14-4-8.md"
last_updated: "2026-10-21T00:00:00.000Z"
description: "Lists important changes for Nutrient .NET SDK 14.4.8"
---

Nutrient.NET SDK 14.4.8 introduces an expanded PDF digital-signing engine and improves PDF/A and PDF/UA conversion. It also includes performance and reliability updates across PDF and Office workflows.

Below are the notable updates in this release.

## PDF digital signing

The signing engine adds support for Elliptic Curve Digital Signature Algorithm (ECDSA) certificates and PKCS#11 signing devices. It also supports PDF Advanced Electronic Signatures (PAdES) baseline levels B-LT and B-LTA. You can also use deferred signing with an external signing service, add document timestamps, and add long-term validation (LTV) information to existing signatures. The SDK can also read and validate document timestamps. Validation of documents with multiple signatures also improves.

**Compatibility note:** The SDK no longer uses Secure Hash Algorithm 1 (SHA-1) to create new signatures. It can still verify existing SHA-1 signatures.

## PDF/A and PDF/UA

PDF/A and PDF/UA conversion output has improved structural consistency. This release also fixes font handling in PDF/A conversion and improves the handling of invisible optical character recognition (OCR) text in PDF/A output.

## Performance and document conversion

PDF font embedding is faster. This release also improves XLSX-to-PDF conversion and AI-powered table and chart recognition. The default local vision model now uses a higher-accuracy configuration for chart and figure extraction. It requires more memory than the previous default. On memory-constrained systems, configure a smaller compatible model in the custom vision language model (VLM) API settings. Office conversion fixes address right-to-left text alignment, page and footnote layout, malformed files, and issues affecting MSG, XLSX, DOCX, and PowerPoint documents.

## Reliability and error reporting

The SDK returns more specific error statuses for common runtime and PDF operation failures. PDF methods called before a document is loaded now return the dedicated [`PdfNoDocumentLoaded` status](https://www.nutrient.io/api/gdpicture/GdPicture.NET.14.API~GdPicture14.GdPictureStatus.html) instead of a generic error. This release also fixes annotation rendering issues in thumbnails on.NET 8 and later, and unbounded native memory growth in long-running services.

For the complete list of changes included in 14.4.8, refer to the [changelog](https://www.nutrient.io/guides/dotnet/changelog.md#14.4.8).
---

## Related pages

- [14 4 1](/guides/dotnet/release-notes/14-4-1.md)
- [14 4 10](/guides/dotnet/release-notes/14-4-10.md)
- [14 4 2](/guides/dotnet/release-notes/14-4-2.md)
- [14 4 3](/guides/dotnet/release-notes/14-4-3.md)
- [14 4 4](/guides/dotnet/release-notes/14-4-4.md)
- [14 4 5](/guides/dotnet/release-notes/14-4-5.md)
- [14 4 6](/guides/dotnet/release-notes/14-4-6.md)
- [14 4 7](/guides/dotnet/release-notes/14-4-7.md)
- [14 4 8 1](/guides/dotnet/release-notes/14-4-8-1.md)
- [14 4 9](/guides/dotnet/release-notes/14-4-9.md)
- [14 4](/guides/dotnet/release-notes/14-4.md)