The C# OCR Library

IronOCR is the leading C# OCR library for reading text from images and PDFs. Its user friendly API allows developers to have OCR up and running in their .NET projects in minutes.

OCR for C# to scan and read images & PDFs
.NET OCR library with 127+ global language packs
Output as text, structured data, or searchable PDFs
Supports .NET 8, 7, 6, Core, Standard, Framework
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Images to Text with OCR

  
 
using IronOcr;
var ocr = new IronTesseract();
using var input = new OcrInput();
input.LoadImage("attachment.png");
input.LoadPdf("report.pdf");
OcrResult result = ocr.Read(input);
string text = result.Text;
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A C# OCR Library that prioritizes accuracy, ease of use, and speed.

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

Cross Platform Support

Designed for C#, F#, & VB.NET running on .NET 8, 7, 6, Core, Standard, or Framework

Compatibility

.NET Languages:

  • C#, VB.NET, F#

Platforms:

  • .NET 8, 7, 6 & 5
  • .NET Core 2x & 3x
  • .NET Standard 2
  • .NET Framework 4.6.2+

App types:

  • Console, Web, & Desktop

Operating Systems:

  • Microsoft Windows
  • macOS
  • Linux
  • Docker
  • Azure
  • AWS

IDEs

  • Microsoft Visual Studio
  • JetBrains ReSharper & Rider

Certification

  • Microsoft Authenticode

OCR Engine

Underlying OCR Engine

  • Tesseract 5 (Custom for .NET)

International Languages

  • 125 Languages
  • High and Fast Quality
  • Custom Languages

Text and Barcode Reading

  • Text and Numbers
  • Multiple Languages at Once
  • Barcodes

Specialist Documents

  • Receipts
  • Checks (Cheques)
  • Invoices

Concurrency

  • Single and Multithreading
  • Async Support
  • Suspend current thread
  • Cancel OCR Reading

Computer Vision:

  • Find text with trained models

OCR Input

Read from Many Formats:

  • Images (jpg, png, gif, tiff, bmp)
  • Multi-Page/Frame (tiff, gif)
  • System.Drawing Objects
  • Streams
  • PDFs (optimized target DPI)

Filters:

  • Filter Wizard (Find best filter combination)
  • Image Correction (Sharpen, Enhance Resolution, Denoise, Dilate, Erode)
  • Fix Image Orientation (Rotate, Deskew, Scale)
  • Fix Image Colors (Binarize, Grayscale, Invert, ReplaceColor, SelectTextColor)

Apply a Crop Region:

  • CropRectangle

OCR Result

Simple Data Output:

  • .NET Text Strings
  • Barcode and QR Data
  • Images

Structured Data Output:

  • Pages
  • Blocks
  • Paragraphs
  • Lines
  • Words
  • Characters

Export Documents:

  • Searchable PDFs
  • OCR Export
  • HTML Export
  • Page or Text as image
  • Barcode or QR as Image

Highlight Text and Save:

  • Characters, words, lines, and paragraphs

Status and Analytics:

  • OCR Progress Tracking
  • Result Confidence