Fixed stability issues when OCR-ing large volumes of PDFs in parallel, and added controls to limit OCR memory usage.
Fixed loading of large TIFF files and improved error messages for unsupported TIFF images.
IronPDF for .NET 2026.8.12026年8月3日
機能
Added AES-128 and AES-256 PDF encryption support through PdfSecuritySettings.EncryptionType.
Added support for RFC 3161 trusted timestamps when signing PDFs with HSM device.
Updated internal dependencies.
修正
Fixed an issue where merging or inserting PDFs with nested bookmarks could flatten the bookmark hierarchy.
Fixed startup failures on Azure App Service under read-only deployments and improved deployment error messages with clearer guidance for native engine setup.
Fixed an issue where embedded file names could be ignored when converting PDFs to PDF/A.
Fixed an issue where converting PDFs to PDF/UA could shift page content for documents with multiple content streams.
Fixed initialization failures on minimal Linux containers and added an option to skip deployment commands.
Fixed an issue where landscape rendering with responsive CSS or fit-to-page scaling could leave empty areas at the edge of the page.
Fixed HSM (PKCS#11) PDF signing so signed documents validate correctly in Adobe Reader.
Fixed an issue where replacing text with a standard PDF font could use the wrong font.
Fixed a crash during PDF/UA conversion for certain PDFs and improved PDF/UA-1 compliance.
Fixed an issue where replacing embedded subset fonts with standard fonts could produce garbled text.
Fixed an issue where auto-sized HTML headers and footers could overlap page content on repeated renders.
Fixed digital signature validation for PDFs with nested AcroForm signature fields or trailing padding bytes.
IronWord for .NET 2026.8.12026年8月3日
機能
Updated internal dependencies.
修正
Fixed an issue where certain DOCX files could fail to load or save due to unsupported document elements.
IronXL for .NET 2026.8.12026年7月31日
機能
Updated internal dependencies.
修正
Fixed AutoSizeColumn incorrectly sizing columns containing DateTime values with localized built-in Excel date formats, preventing clipped (####) date displays.
Fixed =-prefixed text being parsed as formulas in Text-formatted cells or when prefixed with ', matching Excel behavior.
IronPDF for Java 2026.5.12026年5月27日
機能
Added LinkAnnotation class for creating clickable links within PDF documents that navigate to specific pages and positions, with full BookmarkDestinations support.
Added full PDF linearization support: instance methods linearizePdfToBytes(), linearizePdfToStream(), saveAsLinearized(Path), along with static byte[]/InputStream overloads and isLinearized.
Added automatic PDF bookmark generation from HTML headings (h1-h6) during rendering, including correct hierarchy, page mapping, and optional filtering by heading level or CSS selector.
Updated internal dependencies.
修正
Fixed an issue where HTML headers and footers did not scale correctly when using UseScaledRendering() with non-default zoom levels.
Fixed intermittent SEGFAULT during process teardown and improved tab pool stability to prevent concurrent rendering issues and log spam.
IronPDF for Node.js 2026.5.12026年5月27日
機能
Added LinkAnnotation class for creating clickable links within PDF documents that navigate to specific pages and positions, with full BookmarkDestinations support.
Added full PDF linearization support: linearizePdfToBytes, linearizePdfToStream, saveAsLinearized, static linearizePdfBytesToBytes / saveAsLinearizedFromBytes, and isLinearized.
Added automatic PDF bookmark generation from HTML headings (h1-h6) during rendering, including correct hierarchy, page mapping, and optional filtering by heading level or CSS selector.
Updated internal dependencies.
修正
Fixed intermittent SEGFAULT during process teardown and improved tab pool stability to prevent concurrent rendering issues and log spam.
IronOCR for .NET 2026.6.12026年5月26日
機能
Improved searchable PDF OCR alignment for numeric content with refined digit width compensation and font sizing accuracy.
Updated internal dependencies.
IronPDF for .NET 2026.6.12026年5月26日
機能
Added AdvancedCompressionOptions for fine-grained PDF compression control, including image DPI downsampling, JPEG quality settings, structure-tree removal, and customizable optimization flags.
Added PdfDocument.SetFormFont, SetFormFontFromFile, and DisableFormFontFallback APIs to control or suppress automatic form-field font embedding.
Added ECDSA PDF signature support with correct SHA/OID mappings for reliable verification and signing of EC-signed PDFs.
Updated internal dependencies.
修正
Fixed invisible or missing headers and footers on scanner-generated and browser-printed PDFs.
Fixed an issue where CopyPages could drop form fields with shared widget annotations across multiple pages, causing visible fields to disappear in copied documents.
Fixed incorrect Table of Contents page numbers for long headings that wrapped across multiple rendered lines.
Fixed excessive PDF size growth when combining static content headers/footers with dynamic content in large documents.
Fixed IronPdfEngine queue deadlocks under concurrent load.
IronPDF for Python 2026.6.0.12026年5月26日
機能
Added AdvancedCompressionOptions for fine-grained PDF compression control, including image DPI downsampling, JPEG quality settings, structure-tree removal, and customizable optimization flags.
Added PdfDocument.SetFormFont, SetFormFontFromFile, and DisableFormFontFallback APIs to control or suppress automatic form-field font embedding.
Added ECDSA PDF signature support with correct SHA/OID mappings for reliable verification and signing of EC-signed PDFs.
Updated internal dependencies.
修正
Fixed invisible or missing headers and footers on scanner-generated and browser-printed PDFs.
Fixed an issue where CopyPages could drop form fields with shared widget annotations across multiple pages, causing visible fields to disappear in copied documents.
Fixed incorrect Table of Contents page numbers for long headings that wrapped across multiple rendered lines.
Fixed excessive PDF size growth when combining static content headers/footers with dynamic content in large documents.
Fixed IronPdfEngine queue deadlocks under concurrent load.
IronPrint for .NET 2026.6.12026年5月26日
機能
Updated internal dependencies.
修正
Fixed memory leak when calling Printer.Print / PrintAsync repeatedly.
IronWord for .NET 2026.6.12026年5月26日
機能
Added Mail Merge support for discovering and populating merge fields from dictionaries, DataTables, and DataSets, including repeating regions via TableStart/TableEnd markers.
Updated internal dependencies.
IronXL for .NET 2026.6.12026年5月25日
機能
Added support for 40+ modern Excel _xlfn.* functions, improving EvaluateAll() compatibility with Microsoft 365 workbooks.
Updated internal dependencies.
IronXL for Python via .NET 2026.6.0.1メジャーバージョン2026年5月25日
機能
Added support for 40+ modern Excel _xlfn.* functions, improving EvaluateAll() compatibility with Microsoft 365 workbooks.
Updated internal dependencies.
修正
Known Issues:
Range.Value = <python int> stores an empty string instead of the integer (formulas reading the cell resolve to 0). Use IntValue or a Python float as a workaround; .NET is unaffected.
Improved PDF rendering performance by reducing internal render calls and reusing browser tabs to minimize startup overhead.
Improved PDF/UA structure tree tagging for forms with mixed input types, hidden elements, deeply nested labels, and annotation ordering to ensure correct widget-to-structure element association.
Improved IronPdfEngine Docker image security by removing unnecessary packages, resolving 4 high-severity CVEs and over 1,400 other security scan findings.
Improved IronPdfEngine Docker container to correctly forward runtime arguments like port, license_key, and chrome_browser_limit.
Reduced IronPdfEngine Docker image size by 60% (from 2.89 GB to 1.14 GB).
修正
Fixed memory leak in ReplaceTextOnPages, ReplaceUnicodeText, RedactText, and RedactRegions where repeated calls caused increasing memory growth (93-97% reduction).
Fixed buffer over-read in GetMetadata that could cause crashes or data corruption.
Fixed an issue where PDF/UA conversion removed CSS overflow:hidden clipping, ensuring clipped images render identically to standard PDF output.
Fixed an issue where SignatureName was always empty when verifying signatures created by external signers such as Adobe Reader.
Fixed missing header/footer images in DOCX to PDF conversion (DrawingML and VML).