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Flatten PDF using C#

Flatten PDF to prevent unwanted changes

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Flatten PDF features

Flatten PDF C# library is a tool that allows you to lock PDF form fields and prevent further modifications of the values entered into the PDF forms. It also provides an option to prevent text selection, copying, and extraction by turning the textual symbols into vectorial paths to make the PDF read-only while preserving the original vectorial PDF quality.

C# library install

ConvertAPI provides an ASP.NET C# library that allows you to perform a Flatten PDF conversion with just a few lines of code. Flatten PDF 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");

Flatten PDF using C# in no time!

Once you have your authentication in place, simply copy-paste this pdf to flatten 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

<!-- For conversions with the multiple file result please refer to this example: https://repl.it/@ConvertAPI/HTML-Form-with-multiple-file-result -->

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

FlattenText Bool

Prevent text selection, copying, and extraction by turning the textual symbols into vectorial paths to make the PDF read-only while preserving the original vectorial PDF quality.

Password String

Sets the password to open protected documents.

Try Flatten PDF for free!