What document formats can I check with your .NET library?

Our library supports grammar checking for a broad range of document formats, including but not limited to PDF, DOC, DOCX, ODT, RTF, HTML, Markdown, TXT, and more.

Is there a maximum document size for grammar checking when using Aspose.Words for .NET?

Any document that can be processed by Aspose.Words for .NET can be checked effectively. Thus, there is no limit on document size, but be aware that large language models may require additional charges.

What additional charges should I expect for grammar checking services?

Be aware that using large language models, such as those provided by OpenAI, Google, or Claude, may involve additional fees. It is important to monitor your usage to manage costs efficiently.

Check Grammar In Word, PDF Documents In C#

Q: How to check grammar in a document using C#?

To check grammar in a document, use the CheckGrammar API which will interact transparently with AI services to detect and highlight grammatical problems. Install Aspose.Words for .NET. Add a library reference (import the library) to your C# project. Open the source file in C#. Invoke CheckGrammar method, passing in your document. Once completed, the grammatical issues in the document will be highlighted, and you can save the result as a new file in the format you need.

AI Grammar Checker for Documents in C#

Detect and highlight grammar errors in documents using OpenAI, Google, and Claude AI models with Aspose.Words for .NET. The CheckGrammar method analyzes DOC, DOCX, RTF, PDF, HTML, Markdown, ODT, TXT, and EPUB files and marks grammatical problems — helping you deliver polished, professional content without manual proofreading.

Why Developers Choose Aspose.Words for Grammar Checking

One API call to grammar-check an entire document
Support for OpenAI (GPT-4o), Google (Gemini), and Claude model families
Highlighted errors in the output document for easy review
Support for DOC, DOCX, RTF, PDF, ODT, HTML, Markdown, TXT, EPUB, and more

Authentication requires an API key from your chosen AI provider. For a full list of supported models, see the API Reference.

Start checking grammar in C# today — try the live demo above.

Example code in C# for grammar checking

Output format

Select the target format from the list

Run code

dotnet add package Aspose.Words

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using Aspose.Words;

Document doc = new Document("Document.docx");
string apiKey = Environment.GetEnvironmentVariable("API_KEY");

// Use OpenAI generative language models.
AiModel model = AiModel.Create(AiModelType.Gpt4OMini).WithApiKey(apiKey);

CheckGrammarOptions grammarOptions = new CheckGrammarOptions();
grammarOptions.ImproveStylistics = true;

Document proofedDoc = model.CheckGrammar(doc, grammarOptions);
proofedDoc.Save("Output.docx");
                    
using Aspose.Words;

Document doc = new Document("Document.docx");
// Pass an empty string if the self-hosted model does not require an API key.
AiModel model = new CustomAiModel("my-model-24b", "https://your-server.com/v1").WithApiKey("");

CheckGrammarOptions grammarOptions = new CheckGrammarOptions();
grammarOptions.ImproveStylistics = true;

Document proofedDoc = model.CheckGrammar(doc, grammarOptions);
proofedDoc.Save("Output.docx");

class CustomAiModel : OpenAiModel
{
    private readonly string mUrl;
    internal CustomAiModel(string name, string url) : base(name) { mUrl = url; }
    public override string Url => mUrl;
}

                    

				Run code
			

You may freely copy this code and use it in any applicable purpose

How to check grammar in a document using C#

Install Aspose.Words for .NET.
Add a library reference (import the library) to your C# project.
Open the source file in C#.
Invoke CheckGrammar method, passing in your document.
Once completed, the grammatical issues in the document will be highlighted, and you can save the result as a new file in the format you need.

.NET library to check grammar

There are three alternative options to install "Aspose.Words for .NET" onto your system. Please choose one that resembles your needs and follow the step-by-step instructions:

Install a NuGet Package. See Documentation
Install the library using Package Manager Console within Visual Studio IDE
Install the library manually using Windows Installer

System Requirements

Our product is fully cross-platform and supports all major .NET implementations:

.NET ≥ 5.0
.NET Core ≥ 2.0
.NET Standard ≥ 2.0
.NET Framework ≥ 3.5
MonoMac
MonoAndroid
Xamarin

As far as .NET code doesn't depend on the underlying hardware or operating system, but only on a Virtual Machine, you are free to develop any kind of software for Windows, macOS, Android, iOS and Linux. Just make sure you have installed the corresponding version of .NET Framework, .NET Core, Windows Azure, Mono or Xamarin.

We recommend using Microsoft Visual Studio, Xamarin, and MonoDevelop integrated development environments to create C#, F#, VB.NET applications.

Fore more details please refer to Product Documentation.

Check grammar of Word, PDF, Web documents in C#

.NET solution for checking grammar using AI

AI Grammar Checker for Documents in C#

Why Developers Choose Aspose.Words for Grammar Checking

How to check grammar in a document using C#

.NET library to check grammar

System Requirements