1. IronOCR
2. Changelog

Stay Updated with IronOCR’s Changelog

IronOCR Roadmap

We developed IronOCR to fill a market need, and it’s excelled as one of our leading products. Today we are continually shipping new feature requests, driven by community demand.

We actively work with Google’s latest Tesseract technology to drive stability and high accuracy. This ensures our customers are benefiting from the cutting-edge OCR reading engine.

Our monthly releases see IronOCR continually prove its worth and drive our mission to help end users move the .NET language forward.

We know IronOCR is one of the top choices developers make¹. To cement IronOCR as the leading product of its kind, we are applying the latest technology to improve image filters, computer vision, and machine learning.

Our next epic will be to launch IronOCR for multiple programming languages.

^{¹Based on a customer survey conducted in June 2022.}

June 2025

IronOCR v2025.6.2

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2025.6.2

Release Notes

Updates:

Updates IronSoftware.System.Drawing to 2025.6.2.

Bug Fixes:

• Fixes memory leak when loading PDFs that could cause applications to consume excessive memory over time.
• Fixes SaveAsSearchablePdf() ignores page indices from LoadPdfPages().
• Fixes SaveAsSearchablePdf() returns output PDFs with copies of the first page content for certain input PDFs.

Enhancements:

• Improves searchable PDF text layer coordinates to align more with input contents.
• Improves significant latency for TIFF page Load and Read.

Documentation Updates:

• Adds explanation on how Timeout works for ReadAsync method.

May 2025

IronOCR v2025.5.11

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2025.5.11

Release Notes

Updates:

• Updates IronSoftware.System.Drawing to version 2025.5.3.

Features:

• First release of IronOcr.Extensions.AdvancedScan for Linux and macOS.

Bug Fixes:

• Fixes issue where SaveAsSearchablePdf() ignores page indices from LoadPdfPages().

Enhancements:

• Reduces processing time when generating searchable PDFs after OCR.
• Adds options to generate searchable PDFs with or without OCR filters applied in the SaveAsSearchablePdf method.

Breaking Changes:

• Deprecates IronOcr.ComputerVision package required to run FindTextRegion and FindMultipleTextRegions APIs. Now, IronOcr.Extensions.AdvancedScan is required instead.
• Changes FrameNumber property to PageNumber in the ReadPhoto method.

April 2025

IronOCR v2025.4.13

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2025.4.13

Release Notes:

Updates

• Updates IronSoftware.System.Drawing to version 2025.3.6.

Bug Fixes

Fixes error in SaveAsHtmlDocument() method caused by PdfDocEncoding type initializer exception related to obfuscation issue.

March 2025

IronOCR v2025.3.2

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2025.3.2

Release Notes:

• Updates IronSoftware.System.Drawing to 2025.3.5.
• Fixes incorrect page dimensions of generated searchable PDFs from image inputs.

February 2025

IronOCR v2025.2.3

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2025.2.3

Release Notes:

Enhancements:

Enhances the speed performance by 30% and optimized memory management by 40% for the Read and SaveAsSearchablePdf methods.

Bug Fixes:

• Fixes deployment process does not respect the installation path being set.
• Fixes issues with reading and generating multi-file types as searchable PDFs.

January 2025

IronOCR v2025.1.2

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2025.1.2

Release Notes:

Enhancements:

• Improves reading speed when enabling RenderSearchablePdf and AutoRotateDetectionForRenderSearchablePdf.
• Improves an exception error message for an edge case issue in Read method.
• Updates dependency packages to address known security vulnerabilities.
• Disables internal log messages.

Bug Fixes:

• Fixes an issue where serializing OcrResult to JSON throws an exception.

December 2024

IronOCR v2024.12.2

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.12.2

Release Notes:

• Updates IronSoftware.System.Drawing Dependency to 2024.12.3

November 2024

IronOCR v2024.11.3

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.11.3

Release Notes:

• Updates IronSoftware.System.Drawing Dependency to 2024.9.15.
• Reduces the file size of searchable PDFs for majority of the use cases.
• Fixes the issue of inconsistent dimensions in searchable PDFs.
• Adds a new Tesseract configuration, AutoRotateDetectionForRenderSearchablePdf, enabling users to disable automatic rotation and manually adjust the input file's orientation.

October 2024

IronOCR v2024.10.3

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.10.3

Release Notes:

• Improves ReadPassport for rotated input.
• Updates IronSoftware.System.Drawing Dependency to 2024.9.11

September 2024

IronOCR v2024.9.6

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.9.6

Release Notes:

• Adds a new reading method ReadDocumentAdvanced specialized for Table data read.
• Updates IronSoftware.System.Drawing Dependency to 2024.9.10

August 2024

IronOCR v2024.8.21

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.8.21

Release Notes:

• Fixes temp files do not get cleaned after finish reading
• Updates IronSoftware.System.Drawing Dependency to 2024.8.1

July 2024

IronOCR v2024.7.13

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.7.13

Release Notes:

• Fixes DetecPageOrientation only returned the result of the first page content.
• Fixes ConvertToSearchablePdf overload issue.
• Reduces searchable PDF output file size from Tiff input file.
• Updates IronSoftware.System.Drawing Dependency to 2024.7.2

June 2024

IronOCR v2024.6.3

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.6.3

Release Notes:

• Improved control over scanned characters: Gain more control over the characters captured during advanced scans.
• Enhanced document scanning: Advanced scan mode now supports a wider range of languages including Chinese, Traditional Chinese, Japanese, Korean, and Latin, allowing you to scan documents in more languages.
• Fixes issue where searchable PDFs returned overlapped text: This update resolves an issue where text in searchable PDFs appeared overlapped after scanning.
• Fixes issue when deploying to Azure Function: This update resolves an issue where deploying IronOCR to Azure Functions caused an error.
• Updates IronSoftware.System.Drawing Dependency to 2024.6.1

May 2024

IronOCR v2024.5.25

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.5.25

Release Notes:

• Introduces new Read methods, required separate installation of the IronOcr.Extension.AdvancedScan package.
• New advanced method: ReadPhoto() [See IronOcr.Extension.AdvancedScan NuGet package].
• New advanced method: ReadScreenshot() [See IronOcr.Extension.AdvancedScan NuGet package].
• New advanced method: ReadPassport() [See IronOcr.Extension.AdvancedScan NuGet package].
• New advanced method: ReadLicensePlate() [See IronOcr.Extension.AdvancedScan NuGet package].
• Updates IronSoftware.System.Drawing Dependency to 2024.5.1

April 2024

IronOCR v2024.4.6

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.4.6

Release Notes:

• Remove public log that is not related to OCR processs.
• Updates IronSoftware.System.Drawing Dependency to 2024.4.1

March 2024

IronOCR v2024.3.4

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.3.4

Release Notes:

• Implement DetectPageOrientation to detect orientation of the input.
• Fixed a bug where license key would not be picked up from web.config file in .NET Framework.
• Updates IronSoftware.System.Drawing Dependency to 2024.3.4

February 2024

IronOCR v2024.2.41

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.2.41

Release Notes:

• Overhauls all OcrInput methods to use Load instead of Add prefix. Please try .Load(), .LoadImage(), .LoadPdf()
• Improved overall speed by up to 90% in large PDF input contexts, using up to 80% less allocations and live objects
• Improved memory management for bitmaps in IronCV contexts
• Moved SearchablePdf to its own flag. See Configuration.RenderSearchablePdf which is on by default
• Removed hOCR outputs from default flags. Use Configuration.RenderhOCR = true to explicitly use
• Updates IronSoftware.System.Drawing Dependency to 2024.2.2

January 2024

IronOCR v2024.1.17

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2024.1.17

Release Notes:

• Updates IronSoftware.System.Drawing to v2024.4.1
• Fix Rotation got ignored in output searchable PDF
• Fix the dimension of the output searchable PDF to be relative to the input images
• Fix issue of 16 BPP bmp exported as blank searchable PDF

December 2023

IronOCR v2023.12.34

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.12.34

Release Notes:

• Updates IronSoftware.System.Drawing to v2023.12.1

November 2023

IronOCR v2023.11.35

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.11.35

Release Notes:

• Saving Searchable PDF now correctly outputs original image dimensions instead of A4
• Resolved issue with pre-rotated PDF documents saving as square output Searchable PDFs
• OcrResult.Barcode's Position data now based on original image instead of relative to Crop Region
• Support for UTF-8 Encodings for OcrResult.SaveAsTextFile
• StampCropRectangle can now accept a list of rectangles to stamp
• StampCropRectangle has a static overload that returns the stamped OcrInput for further processing

October 2023

IronOCR v2023.10.9

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.10.9

Release Notes:

• Updated IronSoftware.System.Drawing to version 2023.10.1.
• Updated IronSoftware.Common to version 2023.10.2.

September 2023

IronOCR v2023.9.4

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.9.4

Release Notes:

• Fixes bug causing a crash when multiple Iron Software products are installed
• Added IronSoftware.Common as a new dependency
• Updated IronSoftware.System.Drawing to version 2023.9.2
• Updated IronSoftware.Native.PdfModelto version 2023.9.18570

August 2023

IronOCR v2023.8.34

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.8.34

Release Notes:

• Searchable PDFs now retain bookmarks, annotations, page orientation, etc. (use OcrPdfInput)
• Searchable PDFs now require less disk space
• Added OcrPdfInput class for streamlined OCR of PDF documents
• Added OcrImageInput class for streamlined OCR of images
• Deprecated OcrInput class, although it will still be available for the foreseeable future
• Fixes stamping of crop rectangles not displaying properly

July 2023

IronOCR v2023.7.28

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.7.28

Release Notes:

• Added EnableTesseractWarnings set to false by default, to suppress Tesseract warnings in the console
• Using IronSoftware.Native.PdfModel to read and write PDF
• Updates IronSoftware.System.Drawing to 2023.7.1

June 2023

IronOCR v2023.6.6

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.6.6

Release Notes:

Major Changes:

• PostBuildEvent Runtime Folder Copy Fix: Resolved an issue related to copying the runtime folder during PostBuildEvent
• Updates IronSoftware.System.Drawing to 2023.6.1

May 2023

IronOCR v2023.5.35

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.5.35

Release Notes:

Major Changes:

• Fixes an issue where license keys would not be retrieved from web.config in some .NET Framework ASP.NET projects
• Updates IronSoftware.System.Drawing to 2023.4.4

April 2023

IronOCR v2023.4.13

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.4.13

Release Notes:

Major Changes:

• Updates IronSoftware.System.Drawing to 2023.3.3
• Includes new ReadPdfAndOverlayText method on IronTesseract to add text and preserve original PDF bookmarks/annotations
• Resolves an issue causing Searchable PDFs with many images to becomes large files
• Fixes an issue where the Binarize filter made Searchable PDFs blank
• Fixes issue where the Read method would create temp files and not clean them up
• Adds support for the Iron Suite license keys
• Fixes issues with license keys stored in .config and .json files not being picked up by IronOCR
• Adds support for license keys stored in .config and .json files in subfolders of the application

March 2023

IronOCR v2023.3.2

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.3.2

Release Notes:

Major Changes:

• Adds compatibility for AWS (Amazon Linux)
• Adds compatibility for various older Linux distributions
• Improves reliability when reading text from PDFs
• Improves speed and fidelity when creating searchable PDFs
• Improves logic for finding language files
• Removes dependency on System.Drawing

January 2023

IronOCR v2023.1.11644

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2023.1.11644

Release Notes:

Major Changes:

• Adds Installation.LanguagePackDirectory for specifying path to .ocrdata files
• Fixes IronOcr for use with ClickOnce publishing and 'dotnet publish' command
• Fixes some instances where language packs would fail to load
• Fixes crop rectangle being ignored when reading from TIFF images
• Fixes trial users not being able to read text from images
• Allows single-threaded OCR reads (see IronTesseract.Multithreaded)

December 2022

IronOCR v2022.12.10830

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2022.12.10830

Release Notes:

Major Changes:

• Adds IronSoftware.System.Drawing to replace System.Drawing.Common in IronOCR
• Removes internal dependency on System.Drawing.Common (see footnote [1] for more info)
• Adds support for .NET 7
• Removes support for .NET Framework 4. Minimum supported for .NET Framework is now version 4.6.2

Other Changes:

• Improves support for many Linux Distros
• Improves OcrFilters.DeNoise : Now reduces speckle noise.
• Adds brand new OcrFilters to improve reading from noisy images:
• Open : Filter that is useful for removing noise.
• Close : Filter that is useful for closing small holes inside foreground objects.
• AdaptiveThreshold : Applies a Bradley Adaptive Threshold to the image.

October 2022

IronOCR v2022.11.10109

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2022.11.10109

Release Notes:

• Fixes MAUI support
• Fixes 'missing runtimes folder' error
• Fixes 'missing libtesseract' error
• Greatly improved compatibility and deployment on many platforms
• Adds 'Installation.MachineLearningModelsDirectory' for specifying path to .onnx files
• Minor bug fixes
• Now supports installation via zip file or installer

September 2022

IronOCR v2022.10.9390

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2022.10.9390

Release Notes:

• Adds support for using machine learning technology to detect regions which may contain text
• Adds OcrInput methods FindTextRegion and FindMultipleTextRegions - add the IronOcr.ComputerVision NuGet package for your platform
• Adds OcrResult method SaveAsSearchablePdfStream for saving a result as a PDF stream
• Updates Windows build to require fewer dependencies and use less disk space
• Updates image loading to always remove color tables from images before performing OCR, improving accuracy
• Fixes GetCropRectangleImage to work properly with all source image formats
• Fixes issue with Installation.LoggingMode and LogFilePath not applying properly

August 2022

IronOCR v2022.8.8198

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2022.8.8198

Release Notes:

• Added new method for visualizing a crop rectangle on an image. See OcrInput.StampCropRectangleAndSaveAs()
• Added new method for applying multiple filters at once. See OcrInput.ApplyMultipleFilters()
• Changes Deskew filter to no longer throw an exception on failure
• Improves compatibility on Windows systems which may not have Microsoft C++ redistributables installed
• Improves compatibility on MacOs systems (both Intel and Apple Silicon) which may be missing certain imaging libraries

July 2022

IronOCR v2022.8.7804

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2022.8.7804

Release Notes:

• Updates Tesseract to version 5.1
• Adds support for Apple Silicon devices (MacOs on ARM processor)
• Adds OcrInput.SaveAsImages() for saving input items as an image
• Adds CropRectangle class which allows cropping using millimeter values or pixel values
• Removes MinimumDpi. Please use TargetDpi to upscale your OCR input
• Setting TargetDpi to null now prevents IronOcr from upscaling images, resulting in much smaller searchable PDFs
• Fixes bug where Erosion filter applied Dialation and Dialation filter applied Erosion
• Fixes bug where PDF pages were numbered incorrectly
• Improves compatibility across various Linux distributions

March 2022

IronOCR v2022.3.0

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2022.3.0

Release Notes:

• Improved: .NET 6 Support
• Improved: Secuirty & Performance

January 2022

IronOCR v2022.1.0

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2022.1.0

Release Notes:

• Improved: Multithreading & Performance
• Improved: PDF OCR performance
• Feature: OCR Progress Tracking
• Improved: Orientation and Script Detection (OSD)
• Improved: Deskew Methods
• Improved: Secuirty & Performance

December 2021

IronOCR v2021.12.0

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2021.12.0

Release Notes:

• Improved: Speed and Stability
• Improved: .NET 5 and .NET 6 Beta support
• Improved: Logging

October 2021

IronOCR v2021.11.0

Features & Upgrades

https://www.nuget.org/packages/IronOcr/2021.11.0

Release Notes:

• Bug Fixed: Azure Function Compatibility
• Bug Fixed: Works with read-only OCR dictionaries
• Bug Fixed: Now works with .NET 5.07
• Bug Fixed: License Keys reading from project configuration files (edge casess)
• Feature: Color replacement methods added to OcrInput
• Feature: Load specfic frames from TIFF and PDF files
• Improved: Updated System.Drawing.Common