PDF Merge Tool
Combine multiple PDF files into a single document. Drag to reorder before merging. All processing happens in your browser.
About PDF Merge Tool
Combining multiple PDFs into a single document comes up constantly in office work — assembling contract pages from different signatories, joining scanned receipts for an expense report, consolidating chapters of a manual, or stitching together evidence for a legal filing. This PDF merge tool lets you select multiple PDF files, reorder them via drag-and-drop, and produce a single merged file ready to download.
Because the merging happens entirely in your browser using PDF-lib, your documents — which often contain sensitive personal, financial, or legal information — never get uploaded to a third-party server. Useful for HR teams compiling onboarding paperwork, professionals organizing client documents, and anyone who needs to combine PDFs without paying for premium PDF software.
How to Use
Click 'Add PDFs' to select PDF files (you can add more later).
Rearrange the order using the up/down arrows if needed.
Click 'Merge PDFs' to combine them into one document.
Download the merged PDF.
Frequently Asked Questions
Is there a limit on file size or number of files?
Since everything runs in your browser, the limit depends on your device's memory. Most devices can handle 10-20 PDFs or up to 100 MB total without issues.
Are my PDFs uploaded to a server?
No. All merging happens entirely in your browser using pdf-lib. Your files never leave your device.
Can I reorder pages from different PDFs?
You can reorder the entire PDFs before merging. All pages from each PDF are included in order. For individual page reordering, use the PDF Split tool first, then merge the specific pages.
Will the merge preserve bookmarks and links?
The merge preserves page content, images, and text. Some advanced features like bookmarks, form fields, or JavaScript may not be preserved in all cases.
PDF Merge Tool Online: Combine Multiple PDFs into One (Free)
Merging PDFs shouldn't require uploading sensitive contracts to a third-party site. Our free PDF merger works entirely in your browser — fast and private.
Read the full guide