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.
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. No account, no install.
2Drop two or more PDF files into the workspace.
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.
No upload · no account · no watermark
FAQ
Common questions
Yes, FernPDF is a web app, so it runs in Firefox or Chrome on Linux with no installation. All processing happens on your device using WebAssembly.
Yes. Every core FernPDF tool is free, with no account, no watermark, and no trial limits.
Yes. FernPDF stitches your PDFs together locally using WebAssembly. The combined file is assembled in memory on your device and never sent anywhere.
Drag any file card to reorder it. The number badge shows the final sequence. You can also remove a file with the × button without re-uploading the rest.