Upload multiple PDFs, drag to set the order, and download a single merged file — all in your browser. Your files never leave your device.
Upload multiple PDFs, then drag rows to reorder before merging
Click to choose PDFs, or drag & drop multiple files here
PDF files only · Multiple files accepted · Processed entirely in your browser
Click the upload zone or drag multiple PDF files onto the page at once. Files are read locally — nothing is sent to a server.
Drag the rows up or down to arrange files in the order you want them to appear in the final merged document.
Click Merge PDFs and your combined file downloads instantly. No waiting, no server, no watermarks, no signup.
Most online PDF mergers require you to upload your files to a remote server. That means your documents — contracts, reports, medical records, tax forms — are transmitted over the internet and stored temporarily (sometimes permanently) on someone else's infrastructure. This tool uses pdf-lib, a pure-JavaScript PDF library, to combine your files entirely within your browser tab.
Click the upload zone or drag and drop multiple PDF files onto the page. Each file appears as a row showing the filename and page count. Drag rows up or down to set the order you want. When ready, click Merge PDFs to combine them and download the result instantly.
There is no server-imposed file size limit because all processing happens in your browser. The practical limit is your device's available memory. Most modern computers can merge dozens of PDFs totalling hundreds of megabytes without issue.
Yes — completely. Your PDF files are read locally on your device and are never uploaded to any server. All merging happens in your browser tab's memory and the final file downloads directly to your computer. Nothing is transmitted or stored anywhere.
You can reorder the files by dragging rows in the list. All pages within each PDF are included in their original order. To reorder individual pages across documents, use the Extract Pages tool to create PDFs containing only the pages you need, then merge them here in the desired order.
Looking for more PDF utilities? Try the Extract Pages from PDF tool to pull specific pages from a single PDF, or the Remove Pages from PDF tool to delete unwanted pages. All tools are free, in-browser, and require no signup.