Merge PDF
Upload PDF or Office documents, arrange the order, and download one combined PDF — no sign-up required.
Drop PDF or Office files to merge
Upload multiple PDF, DOC, DOCX, XLS, XLSX, PPT, or PPTX files and we'll prepare them for a visual merge workspace.
or drag files here
PDF files open directly. Office documents are converted to PDF on the server for editing.
Supported formats
Merge queue
Drag file cards to reorder them before merging.
Your merge queue is empty
Upload two or more PDF or Office files to see file cards, reorder them visually, and prepare the final merged document.
Page preview
Review how pages will flow in the final merged document.
No pages to preview yet
Upload PDF or Office files and their pages will appear here as visual cards.
Start with your files
Upload PDF, DOC, DOCX, XLS, XLSX, PPT, or PPTX files to preview them, arrange the order, and merge everything in one clean flow.
Queue summary
Frequently Asked Questions
How do I merge PDF files online for free?
Upload two or more PDF files to UsePDF.io, arrange their order if needed, and click Merge. Download the combined PDF instantly — no sign-up required.
How many PDF files can I merge at once?
You can merge as many files as needed in one session. Each file can be up to 50 MB.
Can I merge Word or Excel files into a PDF?
Yes. UsePDF.io automatically converts DOC, DOCX, XLS, XLSX, PPT, and PPTX files to PDF before merging them.
Can I change the order of pages before merging?
Yes. After uploading, you can drag and drop files to reorder them before merging.
Is the merged PDF kept private?
Yes. All uploaded files are deleted from our servers immediately after the merged PDF is ready for download.