PDF 分割

How Split PDF Works

ConvertUnlimited utilizes pdf-lib, a modern JavaScript library for PDF manipulation that runs natively in your browser. When you upload a document, our tool parses its internal structure locally. Based on your specified ranges (e.g., "1-3" or "5, 10"), it creates a new PDF container and copies the specific page objects into it.

Because all logic is executed on your device's CPU and RAM, your document contents are processed locally in your browser. This local-first architecture ensures local browser-based processing for sensitive files like medical records, legal contracts, and personal documents.

Why Split PDF Files?

• Extracting Specific Pages: Grab only the summary or the signature page from a long report.
• Separating Large Documents: Break a massive ebook into chapters for easier reading.
• Privacy Protection: Remove unnecessary pages before sharing a document with others.
• Organization: Split a multi-scan PDF into individual one-page documents.

Page Range Examples

Our tool supports flexible syntax for selecting pages:

• Single Pages: Type 5 to extract only page 5.
• Continuous Ranges: Type 1-3 to extract pages 1, 2, and 3.
• Complex Combinations: Type 1-3, 5, 8-10 to extract pages 1, 2, 3, 5, 8, 9, and 10 into one new file.

Frequently Asked Questions

Can I split every page at once?

Yes. Use the "すべてのページを分割" button to automatically generate a separate PDF for every single page in your document. These will be bundled into a convenient ZIP archive for download.

Does it work with encrypted PDFs?

Password-protected files cannot be split unless they are decrypted first. Please remove the password using a dedicated utility before using this tool.

Browser Support

This tool works in all modern browsers supporting the File API and WebAssembly, including Chrome, Firefox, Safari, and Edge.

Privacy

Privacy build: This build removes ads, analytics, remote fonts, runtime CDN scripts, and file-operation telemetry. Selected files are processed in the browser using local JavaScript and browser APIs.

Your Documents: ConvertUnlimited does not provide a server-side upload endpoint for this PDF processing flow. Selected PDF contents are processed locally in your browser.

Terms of Use

ConvertUnlimited is provided "as is" without warranty of any kind. You are responsible for the content you process and must ensure you have the legal right to split the documents you provide. We are not liable for any data loss resulting from the use of this tool.