PDF to OCR using C#

Convert PDF scans to searchable PDF documents.

PDF to OCR features

The C# library for converting scanned PDF documents to searchable and editable PDF documents using optical character recognition (OCR). Add textual layer to scanned PDF document.

C# library install

ConvertAPI provides an ASP.NET C# library that allows you to perform a PDF to OCR conversion with just a few lines of code. Convert PDF to OCR documents using C# programming language with no effort at all!

        NuGet Terminal >
    
Install-Package ConvertApi

NuGet GitHub

Authenticate ConvertAPI C# library

You can obtain your secret key by signing up for a free account. Once you sign up, you'll receive 250 free conversions instantly! Grab your authentication secret from the account dashboard, and authenticate the ConvertAPI C# library like this:

// get your secret key here: https://www.convertapi.com/a/auth

ConvertApi convertApi = new ConvertApi("secret_or_token");

PDF to OCR using C# in no time!

Once you have your authentication in place, simply copy-paste this pdf to ocr conversion code snippet into your C# project:

// Code snippet is using the ConvertAPI JavaScript Client: https://github.com/ConvertAPI/convertapi-js

// Code snippet is using the ConvertAPI Node.js Client: https://github.com/ConvertAPI/convertapi-nodejs

// Code snippet is using the ConvertAPI PHP Client: https://github.com/ConvertAPI/convertapi-php

// Code snippet is using the ConvertAPI Java Client: https://github.com/ConvertAPI/convertapi-java

// Code snippet is using the ConvertAPI C# Client: https://github.com/ConvertAPI/convertapi-dotnet

# Code snippet is using the ConvertAPI Ruby Client: https://github.com/ConvertAPI/convertapi-ruby

# Code snippet is using the ConvertAPI Python Client: https://github.com/ConvertAPI/convertapi-python

// Code snippet is using the ConvertAPI Go Client: https://github.com/ConvertAPI/convertapi-go

REM Code snippet is using the command line utility program: https://github.com/ConvertAPI/convertapi-cli

Try the conversion online - no coding required!

You can try out advanced conversion parameters and test the conversion result online using our interactive demo tool. This tool will produce the same conversion output as if you were using the library from your solution, and it will auto-generate the code snippet for you!

Try for FREE!

Conversion parameters

Password String

Sets the password to open protected documents.

PageRange String

Set page range. Example 1-10 or 1,2,5.

OcrLanguage Collection

Set the OCR language. Ask support to add your language if missing.

Values: ca da nl fa de es en he pl pt ru sv tr lt