Merge PDFs
Combine multiple PDF files into one document. Drag to reorder pages, then merge with a single click.
Drop files here, browse
Drop PDFs to merge
Max file size: 100 MB · Multiple files supported
Reorder Files
Use the arrows to reorder PDFs before merging — the final document follows your order.
Private
Merging uses pdf-lib running 100% in your browser. Your documents never leave your device.
Any Size
No page count or file size limits. Merge large books or hundreds of documents.
How to merge PDFs
- Drop two or more PDF files onto the tool above.
- Use the arrow buttons to reorder PDFs as desired.
- Click Merge PDFs and download the combined document.
When to merge PDFs
Merging PDF files is useful when you need to submit multiple documents as a single file — for example, a job application with separate resume and cover letter, a contract with multiple addendums, or a set of invoices combined for accounting purposes.
ConvertForge preserves all pages from every source PDF in the order you specify. There are no page count or file size limits.
Privacy — your files stay on your device
Whenever possible, ConvertForge processes files directly in your browser so your files stay on your device. PDF merging uses pdf-lib running 100% in your browser — your documents are never uploaded to any server.
Frequently Asked Questions
Is merging PDFs free?
Yes, completely free. No account, no watermark, and no limit on how many times you can merge.
Are my PDF files uploaded to a server?
No — merging runs entirely in your browser using pdf-lib. Your files never leave your device.
How many PDFs can I merge?
There is no hard limit. You can merge as many PDFs as your browser memory allows. Dozens of documents work without issue on modern devices.
In what order are pages added?
Pages are added in the order you arrange the files in the list. Use the up and down arrows to reorder before merging.