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IronOCR
IronOCR
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    • C# Image to Text
    • C# Tesseract OCR
    • OCR Image Filters
    • Compatibility
      • License Keys
      • Setup on Azure
      • Setup on Linux
      • Setup on Docker
      • Use OCR in MAUI
    • OCR Engine
      • Iron Tesseract
      • Train and Use Custom Font
      • OCR Read a PDF
      • Use Computer Vision to Find Text
    • Contacting Technical Support
      • How to Make an Engineering Support Request for IronOCR
      • Getting the Best Support for IronOCR
    • Common Questions
      • Why IronOCR and not Tesseract
      • IronOCR - Security CVE
    • Troubleshooting Guides
      • Visual C++ Redistributable for Visual Studio
      • Apply a license key in IronOCR
      • Reduce file size of output PDF in IronOcr
      • Content Areas & Crop Regions with PDFs
      • X and Y coordinates change in OcrResult Class
      • Captcha
      • Save image with different image processing applied
      • Quick IronOCR Troubleshooting
      • Identity Documents
      • Debugging Azure Functions Project on Local Machine
      • Troubleshooting older version of System.Drawing
    • Language Packs
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      • Failed to locate 'tessdata ra.traineddata even after successfully unpacking the language pack
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Free for development from NuGet

Install with NuGet nuget.org/packages/IronOcr

PM > Install-Package IronOcr

Underlying OCR Engine
Tesseract 5 for .NET Tesseract Detailed Configuration Fast OCR Configuration
International Languages
125 International OCR Languages Multiple Languages for 1 Document Using Custom Language Files
Text and Barcode Reading
OCR in 1 line of code OCR with Barcode & QR Reading
Concurrency
MultithreadedTesseract OCR
Read from Many Formats
OcrInput Class OCR a Region of an Image OCR Drawing OCR for MultiPage TIFF Files OCR for PDF Stream OCR Tesseract Image DPI Abort Token Timeouts
Filters
Filter Wizard OCR Image Optimization Filters Fix Image Orientation Fixing Low Quality Scans & Images Highlight Texts for Debugging
Simple Data Ouput
OcrResult Class PDF OCR Text Extraction
Structured Data Output
Create Searchable PDFs by OCR Make any PDF have Searchable, Copyable Text TIFF to Searchable PDF Converter
Export Documents
Exporting Images of OCR Elements
Status and Analytics
OCR Progress and Performance Tracking

Filter Wizard

using IronOcr;
using System;

var ocrTesseract = new IronTesseract();

// WIZARD - If you are unsure which filters to use,
// use the debug-wizard to test all combinations:

string codeToRun = OcrInputFilterWizard.Run(@"images\image.png", out double confidence, ocrTesseract);
Console.WriteLine(codeToRun);
Imports IronOcr
Imports System

Private ocrTesseract = New IronTesseract()

' WIZARD - If you are unsure which filters to use,
' use the debug-wizard to test all combinations:

Private codeToRun As String = OcrInputFilterWizard.Run("images\image.png", Double confidence, ocrTesseract)
Console.WriteLine(codeToRun)
Install-Package IronOcr

Filter Wizard

In case of not knowing which filter should be applied to the image, OcrInputFilterWizard provides the list of filters suitable for ocrInput.

Related Docs Links

Ready to get started? Version: 2023.9 just released

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Start for Free Total downloads: 1,065,305
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Get Set Up in 5 Minutes
C# NuGet Library for PDF
Install with NuGet
Version: 2023.9
Install-Package IronOcr
nuget.org/packages/IronOcr/
  1. In Solution Explorer, right-click References, Manage NuGet Packages
  2. Select Browse and search "IronOCR"
  3. Select the package and install
C# PDF DLL
Download DLL
Version: 2023.9
Download Now
or download Windows Installer here.
  1. Download and unzip IronOCR to a location such as ~/Libs within your Solution directory
  2. In Visual Studio Solution Explorer, right click References. Select Browse, "IronOCR.dll"
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Want to deploy IronOCR to a live project for FREE?
Not ready to buy?

Want to deploy IronOCR to a live project for FREE?

What’s included?
30 days of fully-functional product
Test and share in a live environment
No restrictions in production
Get your free 30-day Trial Key instantly.
Thank you.
If you'd like to speak to our licensing team:

badge_greencheck_in_yellowcircle

The trial form was submitted
successfully.

Your trial key should be in the email.
If it is not, please contact
support@ironsoftware.com

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Have a question? Get in touch with our development team.
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Get started for FREE

No credit card required

Fully-functional product

Get 30 days of fully-functional product.
Have it up and running in minutes.

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Test in a live environment

Test and share in a live environment.
Works wherever you need it to.

bullet_test

No watermarks

No watermarks in production.
No limits.

bullet_watermark
ironocr_for_dotnet

Your Trial License Key has been emailed to you.

Install with NuGet
View Licensing

Licenses from $749. Have a question? Get in touch.

Trusted by Over 2 Million Engineers Worldwide

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IronOCR for .NET

Tesseract 5 OCR in the languages you need, We support 127+.

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Try IronOCR Free

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When you need your PDF to look like HTML, fast.

Tesseract 5 OCR in the languages you need, We support 127+.

When you need to read, write, and style, QR & Barcodes, fast.

The Excel API you need, without the Office Interop hassle.

The power you need to scrape & output clean, structured data.

The complete .NET Suite for your office.

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