PDF preprocessing for LLMs

Turn PDFs into structured data for LLM consumption

Transform PDFs into structured data that LLMs can actually read — lightning fast, with unmatched accuracy and fully API-ready. Use the Pdftools SDK to convert documents into clean JSON, text, or images for your AI workflows in .NET, Java, C, or Python.

  • Process up to 1,000 pages completely free

  • No time limits — no credit card required

Turn PDFs into structured data for LLM consumption

Get started with the Pdftools SDK

Dive right in with guides for C, .NET, Java, and Python — run a sample project and integrate the SDK into your app, step by step.
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Maintain the spatial relationships and formatting

The Pdftools SDK transforms how you work with complex documents. Its proprietary technology preserves critical structural elements in PDFs, maintaining spatial relationships and formatting that conventional extraction methods miss.

Maintain the spatial relationships and formatting

Extract tabular data and line items with superior accuracy.

By delivering perfectly preserved data, the Pdftools SDK enables your LLMs to operate with unprecedented accuracy, especially on complex elements like tables, recurring sections, and line items that often confuse standard solutions.

Extract tabular data and line items with superior accuracy.

What our customers are saying

Customer story

Central conversion solution ensures quality of more than 90,000 documents daily

Suva faced challenges with PDFs from different source systems and standards, requiring a centralized conversion solution for efficient document management.

Customer story

The first ISO PDF/A-compliant electronic website archiving system

The system archives websites in 1:1 PDF/A format, detecting changes and creating new versions when needed, while offering customizable page numbering.

Customer story

Meeting preparation using annotations in PDF Viewer SDK

To streamline development, the project aimed to create a cross-platform annotation solution compatible with standard web technologies and the Cordova framework.

Take the next step with the Pdftools SDK

Join 6,000+ customers building with Pdftools—start for free and take control of your document management.
Process documents swiftly with the highest quality output
Process documents swiftly with the highest quality output
Get expert guidance and support from the Pdftools team at every step
Get expert guidance and support from the Pdftools team at every step
Choose the plan that fits your needs or get a custom quote
Choose the plan that fits your needs or get a custom quote