PDF Split Tool

PDF Split and Merge — Organise Your Documents Without Desktop Software

Two of the most common PDF document tasks — splitting a large PDF into individual sections, and merging multiple separate PDFs into a single document — have traditionally required paid desktop software or risky file uploads to online tools. Both operations can now be done entirely in your browser using the pdf-lib library with no server uploads, no file size costs, and no subscription.

These tools are particularly useful in Pakistani contexts where government offices, universities, banks, and employers frequently request documents as single PDF submissions. Assembling your CNIC, degree certificates, experience letters, and reference letters into a single, properly ordered PDF is a 60-second task with this tool — versus 20+ minutes of hunting for the right desktop app or risking a sensitive document upload to a random online service.

PDF Split: Common Scenarios

• Extract a single page — pull one page from a 50-page bank statement to share one specific transaction record
• Split by range — separate pages 1–10 from pages 11–20 of a combined report, creating two focused documents
• Extract every page as separate files — convert each page of a scanned multi-page document into individual PDFs for sorting and organisation
• Remove confidential pages — extract all pages except the ones containing sensitive information before sharing

PDF Merge: Common Scenarios

• Job application package — merge CV + degree certificate + experience letter + CNIC scan into one professionally ordered document
• University application — combine all required certificates and supporting documents into a single submission file
• Tax documentation — merge monthly invoices or receipts into a single annual PDF for FBR records
• Compiled reports — assemble separate chapter PDFs, table of contents, and appendices into a single publication-ready document
• Legal bundles — compile court filings, evidence, and supporting documents in required page order

How the Split Algorithm Works

1. Your PDF is loaded into pdf-lib in the browser memory
2. You specify the split points (page range, specific pages, or "every page")
3. pdf-lib creates a new PDFDocument object for each output section
4. Pages are copied from the source document to the appropriate output document using copyPages() — this preserves fonts, images, annotations, and formatting from the original
5. Each output document is serialised to bytes and downloaded as a separate PDF file

The merge process works in reverse: each source document's pages are copied into a single target PDFDocument in the order you specify, then serialised and downloaded.

Tips for Best Results

• Check page count first — use the page thumbnail view to confirm page numbers match what you expect before splitting
• Password-protected PDFs — if a PDF requires a password to open, enter it before splitting/merging; the output documents will not be password-protected by default
• Merge order matters — drag to reorder source documents before merging; the order in the thumbnail list becomes the order in the final PDF
• Scanned PDFs vs. text PDFs — both are supported, but scanned PDFs will be larger files since each page is a high-resolution image rather than vector text

Frequently Asked Questions