Splitter: web app, CLI and MCP

What it does

Split a PDF by page ranges, bookmarks, or fixed size. Splits a PDF into multiple files by page, range, or single page.

Inputs and limits

Command line options

• --range (string, default null): Pages to extract, e.g. 1,3,5-7 (default: every page).
• --page (int, default 0): Single page number to extract; 0 means unused.
• --split-type (int, default 1): Split strategy code (default 1).
• --parameters (string, default null): Strategy-specific parameters; null = none.

MCP parameters of split_document

• fileUrl (string, required): Public URL of the PDF to split
• splitType (integer, required): Split type: 0=pages, 1=bookmarks, 2=size
• parameters (string): Page range or interval (e.g. '1-3,5' or '5')

Web app

Open the web app: Split a PDF.

Command line (CLI)

The Documentize.Split plugin: Splits a PDF into multiple files by page, range, or single page.

Replace input-file with your file and add the options listed above after --task-id job1.

# Linux / macOS (needs the .NET 10 runtime and documentize.lic next to the DLL)
export PLUGIN_INPUT_DIR=./work/input
export PLUGIN_OUTPUT_DIR=./work/output
mkdir -p "$PLUGIN_INPUT_DIR/job1"
cp input-file "$PLUGIN_INPUT_DIR/job1/"
dotnet Documentize.Split.dll --task-id job1
ls "$PLUGIN_OUTPUT_DIR/job1"

# Windows PowerShell
$env:PLUGIN_INPUT_DIR  = "$PWD\work\input"
$env:PLUGIN_OUTPUT_DIR = "$PWD\work\output"
New-Item -ItemType Directory -Force "$env:PLUGIN_INPUT_DIR\job1" | Out-Null
Copy-Item input-file "$env:PLUGIN_INPUT_DIR\job1\"
dotnet Documentize.Split.dll --task-id job1
Get-ChildItem "$env:PLUGIN_OUTPUT_DIR\job1"

The Documentize.SplitDoc plugin: Splits a non-PDF document (Word/Excel/PowerPoint) using a strategy code.

Replace input-file with your file and add the options listed above after --task-id job1.

# Linux / macOS (needs the .NET 10 runtime and documentize.lic next to the DLL)
export PLUGIN_INPUT_DIR=./work/input
export PLUGIN_OUTPUT_DIR=./work/output
mkdir -p "$PLUGIN_INPUT_DIR/job1"
cp input-file "$PLUGIN_INPUT_DIR/job1/"
dotnet Documentize.SplitDoc.dll --task-id job1
ls "$PLUGIN_OUTPUT_DIR/job1"

# Windows PowerShell
$env:PLUGIN_INPUT_DIR  = "$PWD\work\input"
$env:PLUGIN_OUTPUT_DIR = "$PWD\work\output"
New-Item -ItemType Directory -Force "$env:PLUGIN_INPUT_DIR\job1" | Out-Null
Copy-Item input-file "$env:PLUGIN_INPUT_DIR\job1\"
dotnet Documentize.SplitDoc.dll --task-id job1
Get-ChildItem "$env:PLUGIN_OUTPUT_DIR\job1"

All command line plugins: Documentize CLI plugins.

MCP

split_document: Split a PDF by page ranges, bookmarks, or fixed size. Returns a task ID.

Client configuration (the key comes from your Documentize account):

{
  "mcpServers": {
    "documentize": {
      "url": "https://api.documentize.app/mcp",
      "headers": {
        "Authorization": "Bearer dmk_YOUR_KEY_HERE"
      }
    }
  }
}

Tool call (tools/call). The tool returns a task id; poll get_task_status until it reports 200, then download the file from uploadFileName:

{
  "name": "split_document",
  "arguments": {
    "fileUrl": "https://example.org/document.pdf",
    "splitType": 1
  }
}

About the MCP server: Documentize MCP server.

Related guides

• Merge PDF files: web app, CLI, and C# libraries
• Delete pages from a PDF: web app and CLI
• Rotate PDF pages: web app and CLI
• Resize PDF pages: web app, CLI, MCP and C# (FOSS)
• Booklet: web app

Verification status

Not verified. This guide is built from the product documentation and the app's own page. The commands and calls above have not been run successfully, so they may need changes, and the file names in them are placeholders. Written on 2026-11-04; a verified guide replaces this page when the app passes the checks.