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Split PDF C# Overview
PDF Split C# library offers a powerful solution for dividing documents with precision, enabling developers to split large PDF files into individual pages or custom page groups based on specific requirements. This customizable C# library seamlessly integrates into your workflow through simple C# library calls, supported by comprehensive SDKs and auto-generated code snippets that minimize development time. Built on secure cloud infrastructure with ISO 27001, HIPAA, SOC 2, and GDPR compliance, our PDF Splitter ensures your sensitive documents remain protected while delivering consistent performance.
Lightning Fast Conversions
Process and convert files in seconds with our high-performance cloud infrastructure.
Accuracy Guaranteed
Our advanced algorithms ensure pixel-perfect and content-accurate file conversions.
Enterprise-Grade Security
ISO 27001, HIPAA, and GDPR compliant with encrypted file processing.
Global Infrastructure
Strategically located servers ensure low latency and high availability worldwide.
Developer Friendly
Comprehensive SDKs and clear documentation for quick and simple integration.
Time-Saving Automation
Automate repetitive document workflows and focus on what matters most.
Customizable Parameters
Fine-tune your automation with these powerful conversion options
File
File Supported formats: .pdfFile to be converted. Value can be URL or file content.
Password
StringSets the password to open protected documents.
SplitByPattern
String Default: 1A comma-separated sequence of positive integers defining the size of each split segment. The PDF will be divided into consecutive chunks whose page counts follow the given pattern, repeating it until all pages are consumed. For a 10-page PDF with SplitByPattern = 3,2, the output will be four documents containing pages [1-3], [4-5], [6-8], and [9-10] (pattern repeats: 3,2,3,2).
SplitByRange
StringSpecify exactly which pages to extract by listing single pages or inclusive ranges. The API will emit one PDF per entry, in the order given. For a 10-page file with SplitByRange = 1-3,5,7-9, you receive three PDFs containing pages [1–3], [5], and [7–9].
SplitByTextPattern
StringSplits the PDF into separate output files by starting a new document at each page whose text matches the specified regular expression. With SplitByTextPattern = Chapter\s+\d+, the PDF will be split at every page where “Chapter 1”, “Chapter 2”, etc., appear. If “Chapter 1” is on page 1, “Chapter 2” on page 10, and “Chapter 3” on page 20 of a 25-page PDF, you’ll get four files containing pages [1–9], [10–19], [20–25], and any pages after the last match (if present).
SplitByBookmark
Bool Default: FalseAutomatically splits a source PDF into individual documents, creating a new file at every bookmarked page. When nested bookmarks are present, splitting occurs at the deepest (child) level, and each output file is named to reflect the full bookmark hierarchy - for example: ParentBookmark-ChildBookmark.pdf. When the source PDF has no bookmarks, the original document is returned unchanged as no-bookmarks.pdf.
ExtractPages
StringSpecify a comma-separated list of pages or inclusive ranges ExtractPages = 1,3-5,7 to pull out from the source PDF. The API will emit one PDF per entry, each containing exactly the pages defined.
MergeOutput
Bool Default: FalseWhen set to true, all split output files (whether defined by page ranges, custom ranges, or text-pattern segments) will be merged into a single PDF. By default false, the API returns one PDF per specified range.
StoreFile
Bool Default: FalseWhen the StoreFile parameter is set to True, your converted file is written to ConvertAPI’s encrypted, temporary storage and made available via a time-limited secure download URL, valid for up to 3 hours. After this period, the file is permanently deleted.
When StoreFile is set to False, conversion happens entirely in-memory. The raw file bytes are streamed back in the API response without touching disk or external storage, ensuring maximum security and zero persistence so that only you can access the content.
Step-by-Step Guide
Easy Split PDF integration programmatically using our simple C# SDK
1. C# library install
ConvertAPI provides an ASP.NET C# library that allows you to perform a Split PDF conversion with just a few lines of code. Convert PDF to SPLIT using C# programming language with no effort at all!
NuGet Terminal >
Install-Package ConvertApi
2. Authenticate ConvertAPI C# library
You can obtain your API Token by signing up for a free account. Once you sign up, you'll receive 250 free conversions instantly! Grab your authentication key from the account dashboard, and authenticate the ConvertAPI C# library like this:
// get your API Token here: https://www.convertapi.com/a/auth
ConvertApi convertApi = new ConvertApi("api_token");
3. Split PDF using C# .NET
Once you have your authentication in place, simply copy-paste this Split PDF conversion code snippet into your C# project:
Integrate within minutes
Easy Split PDF automation using our simple C# SDK
Compatible With All .NET Frameworks & Tools
Frequently Asked Questions
What is ConvertAPI C# SDK?
The ConvertAPI C# SDK is a lightweight, easy-to-use library for .NET developers to integrate document and file conversions into their applications with minimal code. It connects directly to the ConvertAPI REST service, allowing you to automate file conversions, merging, splitting, and more.
What types of conversions are supported?
ConvertAPI offers 300+ converters and tools, including DOCX to PDF, XLSX to PDF, PDF to JPG, HTML to PDF, image processing, metadata extraction, compression, and advanced document workflows. You can automate complex document processing scenarios within your .NET applications using the SDK.
Can I build complex conversion workflows using the SDK?
Yes, the ConvertAPI .NET C# SDK allows you to chain conversions, merge documents, extract pages, and apply advanced parameters to automate end-to-end document workflows within your applications.
Is there a file size limit when using ConvertAPI?
The maximum file size you can convert depends on your ConvertAPI plan type. Higher-tier plans allow larger files and increased concurrency for high-volume document processing needs.
Can I convert files entirely in memory without storing them on your servers?
Yes, ConvertAPI supports in-memory conversions, allowing you to send and receive files as streams without saving them to disk on ConvertAPI servers. This enables secure, diskless workflows for sensitive or temporary files.
Which .NET versions does the ConvertAPI SDK support?
The SDK supports .NET Framework 4.5+, .NET Core, .NET 5, 6, 7, and 8, ensuring compatibility across your existing and new projects.
Businesses trust us
Highest rated File Conversion API on major B2B software listing platforms: Capterra, G2, and Trustpilot.
"ConvertAPI has been a game-changer for our document automation workflows. Their conversion accuracy and API reliability are unmatched in the industry for over 7 years."
"ConvertAPI is a reliable, cost-effective solution with a proven track record of stability. It has grown significantly in maturity, adopting enterprise-grade practices over the years."
"We've integrated ConvertAPI across our entire document processing platform. The performance is exceptional and the support team is always responsive. Highly recommended!"
Enterprise-Grade Security
We ensure that all document processing is handled securely in the cloud, adhering to industry-leading standards like ISO 27001, GDPR, and HIPAA. To enhance security even further, we can ensure that no files or data are stored on our servers and never leave your country.
Learn more about security