PDF Merger
A PDF merger is a free online tool that combines two or more PDF files into a single PDF document, preserving page order and quality.
How to use PDF Merger
- Select PDFs β Choose two or more PDF files from your device.
- Merge β Click Merge PDFs to combine them in order.
- Download β Save the combined PDF to your device.
Key features
- Merge unlimited PDFs
- Preserves page order
- No upload β 100% private
- No watermarks or limits
- Fast browser-based processing
Why Merge PDFs?
PDF merging is one of the most common document tasks. Combine scanned pages into a single PDF, merge invoices for a client, assemble a report from multiple sources, or organize receipts for tax filing. Instead of printing, scanning, and re-scanning, a PDF merger does the job in seconds.
How Our PDF Merger Works
Our tool uses pdf-lib, a JavaScript library, to read each PDF's structure and copy its pages into a new document β all inside your browser using WebAssembly. This means faster processing than server-based tools, no uploads, and no risk of your documents being intercepted or stored.
PDF Merging vs. Compression
Merging combines files without changing their contents β the output may be larger than any single input. Compressing reduces file size by re-encoding content. If your merged PDF is too large to email, use a PDF compressor afterward. Our tools are designed to work together.
ShopBill Pro's Document Tools
For businesses managing invoices, quotes, and receipts, document workflow matters. ShopBill Pro's flagship software generates GST invoices directly as PDFs, eliminating the need for manual merging. For one-off tasks, this free tool handles everything.
Pro tips
- Rename files before merging for clear output naming
- For scanned documents, use high DPI for readable output
- If final PDF is too large, compress it after merging
- Keep original files as backup before merging
Common use cases
- Combining scanned documents into one PDF
- Merging invoices for a monthly client statement
- Assembling reports from multiple sources
- Organizing receipts for tax filing
- Preparing submissions and applications
Frequently asked questions
Is my PDF uploaded?+
No, everything runs in your browser. Files never leave your device.
Is there a size limit?+
No hard limit, though very large files may take longer.
Can I merge PDFs in a specific order?+
Yes β files merge in the order you select them.
Does it preserve quality?+
Yes, PDF pages are copied as-is without re-encoding.
Is it free?+
Yes, completely free with no limits.
Need invoicing, billing & inventory?
Try ShopBill Pro β the full business software. Free plan available.