Free Online Tool
Merge PDF
Combine multiple PDF files into one document, arrange their order, and download the merged PDF directly from your browser.
Limit: maximum 50 PDF files, each 50 MB or smaller
Loading PDF library…
PDF Files Queue
Drag files to reorder them, or use the Up, Down, and Remove controls. The merged PDF follows this order.
How to Merge PDF Files
Select two or more PDF documents from your device.
Drag files or use Up and Down to set the final order.
Create and download one combined PDF document.
Why Use This Merge PDF Tool
Combine chapters, assignments, invoices, reports, scanned pages, and other multi-part PDF documents into one organized file.
Common Errors and Quick Fixes
Merge button stays disabled: add at least two readable PDF files.
Wrong page order: arrange the file queue before starting the merge.
A file cannot be read: it may be damaged, encrypted, or password-protected.
Large files are slow: browser processing speed depends on file size and available device memory.
Privacy and File Handling
PDF files are processed locally in your browser. The merge does not upload or store your documents on our server.
Related Tools
Extract pages with Split PDF, create images with PDF to JPG, or reduce the finished file with PDF Compressor.
Frequently Asked Questions
How many PDF files can I merge?
You can add up to 50 PDF files, each no larger than 50 MB.
Can I reorder files before merging?
Yes. Drag file cards or use their Up and Down buttons.
Can I remove one file from the queue?
Yes. Use the Remove button before starting the merge.
Are bookmarks or forms preserved?
Pages and their visible content are copied, but document-level features such as bookmarks may not be preserved.
Can I merge password-protected PDFs?
No. Unlock protected PDFs before selecting them.
Does this work on mobile?
Yes, but large files may exceed the memory available on some mobile devices.
Are my files uploaded or stored?
No. Files are processed locally in your browser.
Is this tool free?
Yes. The Merge PDF tool is free to use.