How to merge PDF files into one
To merge PDF files, open the Merge PDF tool, add two or more PDFs, drag them into the order you want, and click Merge to download one combined document. The files are concatenated in your browser, so they are never uploaded.
Step by step
Open Merge PDF and drop in every file you want to combine. Each appears as a draggable tile.
Drag the tiles into the final page order, then click Merge PDFs. The download is your single, combined document.
Reordering and trimming first
The tile order becomes the page order of the output, so arrange them before merging.
If a file has pages you don't want in the result, remove them first with Remove Pages or pull out just the pages you need with Split, then merge.
Tools mentioned in this guide
Frequently asked
- Can I merge PDFs without uploading them?
- Yes. PDFER merges files entirely in your browser using WebAssembly and JavaScript, so the documents never leave your device.
- Is there a limit on how many PDFs I can merge?
- No fixed limit — you can merge as many as your device's memory allows. There is no account or watermark.