The C# OCR Library

Go beyond basic OCR. Get an advanced ML engine for .NET 10 and preprocessing that reads scans, screenshots, and handwriting.

Read images, PDFs, and structured documents

125+ languages and filters for poor quality scans

Export structured data, text, hOCR, and searchable PDFs

Free 30-day trial, full features, no credit card

Images to Text with OCR See All 38 Code Examples

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;

Install-Package IronOcr

Next Step: Start Free Trial

Fully functional without watermarks

30-day trial - no credit card required

Next Step: Start Free Trial

Fully functional without watermarks

30-day trial - no credit card required

PM > Install-Package IronOcr

IronOCR

See what’s new:

97% memory reduction for multi-page TIFF documents

Cross Platform Support

Designed for C#, F#, & VB.NET running on .NET 10, 9, 8, 7, 6, 5, Core, Standard, or Framework

.NET Languages:

C#, VB.NET, F#

App Types:

Console, Web, & Desktop

Platforms:

.NET 10, 9, 8, 7, 6 & 5
.NET Standard 2
.NET Framework 4.6.2+

Operating Systems:

Windows
macOs
Linux
Docker
Azure
AWS

IDEs:

Microsoft Visual Studio
Jetbrains ReSharper & Rider

Binary Certification

Microsoft Authenticode

A C# OCR Library that prioritizes accuracy, ease of use, and speed.

IronOCR is the leading C# OCR library, offering superior text extraction from images and PDFs compared to Tesseract. Its user-friendly API enables developers to implement OCR in their .NET projects within minutes.

Get your free 30-day Trial Key instantly.

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

Tesseract OCR in the language you need. We support 125+.

View Full Features Set

Trusted by millions of engineers worldwide

Every time developers ask, it's a YES! from IronPDF

switch(faqQuestions)
{ 
    case "Can I deploy my application using the library to Linux, macOS, or Windows, including Docker containers?": return "YES";
    case "Can I render pixel-perfect PDFs from complex HTML5, CSS3, and JavaScript?": return "YES";
    case "Is the library thread-safe for use in highly concurrent, multi-threaded server applications and APIs?": return "YES";
    case "Can I set custom viewport dimensions and print media CSS to control responsive layouts?": return "YES";
    case "Is IronPDF compatible with Azure Functions?": return "YES";
    case "Can I permanently redact sensitive text and images from PDF documents?": return "YES";
    case "Can I generate a PDF from a URL that requires authentication via custom headers, cookies, or form logins?": return "YES";
    case "Can I access PDF DOM through ObjectModel property?": return "YES";
    case "Can I programmatically fill, read, and flatten interactive AcroForm?": return "YES";
    case "Does it support generating PDF/A and PDF/UA compliant documents for archiving and accessibility standards?": return "YES";
    case "Can I secure a document with 256-bit AES password encryption and set user permissions?": return "YES";
    case "Can I apply and verify digital signatures on a PDF using X.509 certificates?": return "YES";
    case "Can I test IronPDF in my live project for free now?": return "YES, click here to start your 30-day free trial";
}

Does the IronOCR Core library provide programmable APIs to convert rasterized image files (JPEG, PNG, TIFF, BMP, GIF) directly into machine-readable, editable string data?YES!

Is the full library of 127 Tesseract language packs, including non-Latin scripts like CJK, Cyrillic, and Arabic, fully supported and downloadable?YES!

Can I utilize multiple language packs simultaneously in a single OCR operation for mixed-language documents?YES!

Can the engine be configured to preprocess images (Deskew, Denoise, Binarize, Dilate) before OCR to dramatically improve recognition on low-quality scans?YES!

Does it offer low-level access to bounding boxes, confidence scores, and coordinate data for individual characters, words, lines, and paragraphs?YES!

Are results exportable to structured data formats like hOCR (HTML), XML, or search-optimized PDFs in addition to plain text strings?YES!

Does it support reading directly from in-memory byte[] arrays or MemoryStream objects, rather than just file paths, for efficient server-side processing?YES!

Can I process multi-page PDF documents (including scanned image-only PDFs) and extract text, even with password protection enabled?YES!

Are there features to define specific Crop regions or Regions of Interest (ROI) within an image for targeted, high-performance OCR?YES!

Does the library support detecting and reading barcodes and QR codes alongside standard text extraction?YES!

Is the OCR engine fully compatible with .NET Core, Standard, and Framework projects running on Windows, Linux, Docker, and macOS?YES!

Can I test IronOCR in my live project for free now?YES! Click here to start your 30-day free trial