The C# OCR Library

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

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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 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;

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;

Dim ocr = New IronTesseract()

Using input = New OcrInput()
    input.LoadImage("attachment.png")
    input.LoadPdf("report.pdf")

    Dim result As OcrResult = ocr.Read(input)
    Dim text As String = result.Text
End Using

PM >Install-Package IronOcr

Install-Package IronOcr

See what’s new:Enhanced Android Platform Compatibility

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.

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

Tesseract 5

Fully Customizable OCR engine

Extract Data

Extract text with precision

Extract text from specialized formats

Refine & Filter

Filter and Refine images all in a single package

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

Cross-Compatibility

Support Platforms

Manipulate OCR Results

OCR results

Others

Status and Analytics

Why IronOCR?

Accurate text extraction. Built for real-world documents. Works on Windows, Linux, macOS & cloud.

Industry-leading accuracy

Tesseract 5 and advanced ML engines: what humans can read, IronOCR can read.
Auto-detection: text regions, tables, and barcodes. No manual configs needed.
Handles real documents with confidence: skewed scans, photos, and low DPI.

Outcome: Extract usable text, not gibberish that requires manual cleanup.

Up & running in 5 mins

PM > Install-Package IronOcr
```
Install-Package IronOcr
```
→ 5-minute quick starts.
Simple API: Read(), ReadPdf(), ReadBarcode(), and intuitive method names.
Smart defaults: auto-preprocessing, language detection, and layout analysis built in.

Outcome: Ship OCR features this sprint, not next quarter.

Enterprise performance

.NET 10, Core, Standard, or Framework
Multithreading: process batches 5-10x faster than sequential.
Cloud/containers: Azure, AWS, Docker/Kubernetes, serverless.

Outcome: Scale from desktop tools to enterprise document processing.

Robust processing

125+ languages with proper RTL/vertical support.
Advanced ML to deskew, denoise, and enhance resolution.
Structured data: tables to CSV/Excel, forms to JSON.

View Code Examples

Developer-first support & licensing

Perpetual license: buy once, use forever. Optional updates and renewals.
24/5 engineer support (24/7 in Premium). Real humans, median chat response <1 min.
30-day money-back guarantee. Not the right fit? Full refund, no questions.

Chat With an Engineer

For builders

Features you'll actually use:
- text/table extraction
- barcode/QR reading
- PDF to searchable PDF
- confidence scores
- handwriting OCR
- 125+ languages
- image preprocessing
- batch processing
- custom regions (ROI)
- document classification
Works everywhere: Windows, Linux, macOS, Docker, Azure, AWS, cloud.

(30 days, fully-functional product)

For buyers

Trusted by 2M+ engineers and 6M+ NuGet installs.
Teams report 40% dev-time saved vs DIY/OSS wrappers.
Redistribution/SaaS options available.
Procurement-friendly: perpetual license, optional renewals, invoice available, multiple payment options including local.
30-day money-back guarantee.

See Licensing