How to Merge PDF Files Into One (Free, on Any Device)
Open a browser-based PDF merger, add your PDF files, drag them into the order you want and click Merge. You get one PDF containing every page of every file. With a tool that runs locally, your documents are never uploaded.
Steps
- Open Merge PDF.
- Click “Choose PDF files” and select all the files (hold Ctrl or Cmd to pick several).
- Drag the file cards into the right order – on a phone, use the arrow buttons.
- Click “Merge PDFs” and then “Download”.
Need to fine-tune the result?
- Pages in the wrong order or sideways? Use Reorder & Rotate PDF on the merged file.
- File too large to email? Run it through Compress PDF.
- Only need some pages from each file? Extract them first, then merge.
Why merge in the browser?
Many online mergers upload your files to a server. Browser-based tools use JavaScript on your device instead, which is faster for large files on slow connections and means sensitive documents such as contracts or IDs stay with you.
Password-protected PDFs cannot be merged until they are unlocked with their password in a PDF reader.
Questions and answers
Is there a limit to how many PDFs I can merge?
No fixed limit. The practical limit is your device’s memory; dozens of normal-sized files work on most phones and computers.
Does merging change the quality of my PDFs?
No. Pages are copied as they are, so text stays selectable and images keep their resolution.