Split PDF

When You Only Need Part of the Document

A 200-page financial report. You need pages 45–52. Downloading and forwarding the whole thing is inefficient — and in some cases, you shouldn't share the parts you don't need.

Splitting lets you extract exactly the pages you want and produce a clean, smaller PDF containing only those pages. The source file stays untouched and never leaves your device.

Split Modes

By page range — specify a start and end page to extract a continuous section. Useful for pulling a chapter, a section, or a block of exhibits from a larger document.

Individual pages — extract a single page as its own file. Good for separating a signature page, a specific figure, or a cover sheet.

Every N pages — automatically divide a long document into equal chunks. A 60-page report becomes three 20-page files. Useful for distributing portions of a large document to different reviewers.

Custom selection — specify pages in any combination (e.g., "1, 3, 7–10, 15") and extract them as a single output file. Useful for compiling a highlights summary from a long document.

How Page Extraction Works Technically

PDFs aren't linear — they're hierarchical containers. Each page is an individual object in the PDF's structure, linked to its fonts, images, and rendering instructions. Splitting doesn't cut the file like a document editor would; it selectively copies the relevant page objects and assembles a new, complete, self-contained PDF with only those pages.

The tool uses pdf-lib running entirely in your browser's JavaScript engine. It reads your PDF's cross-reference table to locate each requested page, copies the associated objects, resolves any internal naming conflicts, and writes a new valid PDF file — all within your browser's memory. Your original document remains unchanged.

Real-World Scenarios

Contract management: A 40-page master agreement includes supplier-specific schedules as appendices. You need to send each supplier only their own appendix — not the entire contract. Split and distribute.

Academic work: A digitized textbook is one enormous file. Splitting into chapters dramatically improves reading performance on tablets and e-readers, and lets you annotate specific chapters without affecting the rest.

Legal submissions: Court exhibits are numbered individually. A lawyer extracting Exhibit 7 from a comprehensive case bundle to file separately can do it in seconds without rekeying a single character.

Sensitive data compartmentalization: A financial report contains department-specific data across sections. Finance splits the report so each department head receives only their own section — no exposure to other divisions' figures.

Publishing workflow: An editor receives a full print-ready PDF from a designer. They split it into individual chapters or sections to send to reviewers, who only see what they need to review.

Best Practices

Verify page numbers against the visual content. A PDF's internal page numbering doesn't always match the printed page numbers on the document. "Page 45" in the tool may correspond to "page 43" as printed at the bottom of the page. Use the thumbnail preview to confirm you're extracting the right content.

Name your output files immediately. Renamed files are easier to work with later than split_output_1.pdf and split_output_2.pdf.

Compress extracted sections if sharing them. A single extracted chapter from a densely illustrated textbook can still be large. Run extracted files through PDF Compressor before emailing.

For a different arrangement (not extraction), use Page Reorder. If you want to reorganize a document's page sequence rather than extract a subset, use PDF Page Reorder instead.

Limitations

Encrypted PDFs cannot be split. Password protection scrambles the internal page structure, making it unreadable to the extraction engine. Remove the password first with Remove PDF Password, then split.

Interactive forms may not work correctly after splitting. Fillable PDF forms sometimes contain fields that reference other pages in the document for calculation logic. Splitting can break these connections, producing forms where auto-calculated fields stop working. For purely read-only extraction this is fine.

Content that visually crosses page boundaries can't be reassembled. If a table starts at the bottom of page 8 and continues at the top of page 9, there's no way to extract a single "complete table" — you'll get the portions as they appear on each page.

Very large files may be slow in the browser. Processing a 500-page, 150MB PDF in-browser takes more time than smaller files. Split in batches if you're working with very large documents on lower-spec hardware.

Related PDF Tools

• Merge PDF — Combine split sections back together or with other files
• PDF Compressor — Reduce the size of extracted sections before sharing
• PDF Page Reorder — Rearrange pages within a single document
• Remove PDF Password — Unlock protected PDFs before splitting
• PDF Page Number Adder — Add page numbers to extracted sections

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