How to combine multiple PDFs into one file on Linux
You don't need special software to combine multiple PDFs into one file on Linux. FernPDF runs entirely in Firefox or Chrome on Linux: open the tool, drop your file, download the result. The merged file is assembled in your browser's memory and downloads instantly. It never touches a server.
On Linux, you drag it into the drop zone from your file manager, or click to open the browser's native file picker. Once the combined document is ready, it downloads to your ~/Downloads folder, or wherever your browser's settings point downloads, the same as any other file it saves.
The picker's exact look depends on your desktop environment (GNOME, KDE, Xfce), but the underlying behaviour is identical: it's a standard browser file input, not a custom uploader that behaves differently across distributions.
No hunting for the right CLI flags or building tools from source. A browser is the only dependency, on any distribution.
Step by step
- 1Open the Merge PDF tool in Firefox or Chrome on Linux. No install, no account.
- 2Add two or more PDFs: drag it into the drop zone from your file manager, or click to open the browser's native file picker.
- 3Drag the file cards into the order you want; optionally turn on page numbers or form flattening.
- 4Click “Merge PDF” and download the combined document. It lands in your ~/Downloads folder, or wherever your browser's settings point downloads, the same as any other file it saves.
Common questions
Every FernPDF tool processes files in your browser: read how the privacy model works, or verify it yourself in your network tab.