> ## Documentation Index
> Fetch the complete documentation index at: https://docs.unsiloed.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Splitting Overview

> Split a bundled PDF into separate documents by category.

Splitting takes a single PDF that contains several documents bundled together and breaks them apart. Real-world bundles arrive every day (a scanned batch of receipts, a stack of student exams, a patient's referral packet) and downstream systems usually need each logical document on its own.

Given a bundled PDF and a list of candidate categories (the same shape `/classify` uses), `/splitter` returns one downloadable PDF per matched category, each with a confidence score. All pages assigned to the same category are collected into that category's file: a bundle with two invoices produces one Invoice.pdf containing both, not two separate files.

## How It Works

After you submit a PDF and categories, the API:

1. Analyzes every page of the bundle.
2. Classifies each page against your candidate categories.
3. Groups adjacent pages of the same type so multi-page documents stay together.
4. Generates one PDF per matched category, named after the category.
5. Returns a download URL and confidence score for each split file.

## Common Categories

Categories are whatever you define. Common groupings include:

* **Business:** invoices, receipts, purchase orders, contracts
* **Financial:** bank statements, financial reports, tax forms
* **Legal:** contracts, agreements, legal notices, compliance forms
* **Healthcare:** medical records, insurance forms, lab reports
* **HR:** resumes, employment forms, payroll documents
* **Academic:** research papers, reports, transcripts

## Dig Deeper

<CardGroup cols={2}>
  <Card title="Getting Started With Splitting" icon="rocket" href="/docs/document-processing/splitting/quickstart">
    Submit a bundled PDF, define categories, and read back the split files.
  </Card>

  <Card title="Response Format" icon="square-list" href="/docs/document-processing/splitting/response-format">
    Browse the canonical splitting response shape with a field-by-field reference.
  </Card>
</CardGroup>

For the full request and response specification, see the [Split API reference](/docs/api-reference/splitting/split-document).