Organize PDF
Combine multiple PDFs into one document in seconds — secure, private, and free.
Drag & drop PDF files here
Drag and drop or browse to select the PDF files you want to combine.
Drag files into your preferred order using the handles on each item.
Hit the Merge button and the tool combines all pages into one document.
Your merged PDF downloads automatically — ready to share or archive.
This tool uses pdf-lib, an open-source JavaScript library that runs inside your browser. When you click Merge, the library reads each PDF's binary data from memory, copies every page into a new document, and saves the result — all without any network requests. Your files stay in your browser's memory and are released once processing is complete.
Yes, your files never leave your browser. All merging happens locally using JavaScript, so no data is uploaded to any server. Your documents remain completely private.
No hard limit. The tool processes files using your browser's available memory, so it can handle most typical documents. Extremely large files may be slower depending on your device.
Yes, after uploading your files you can drag and drop them into any order you like. The merged document will follow your chosen sequence.
Yes, the tool is fully responsive and works on phones and tablets. You can select files from your device and merge them on the go.
There is no set limit. You can merge as many PDFs as your browser can handle. Add files one batch at a time or all at once.