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Add files, drag pages into order, then download one PDF.
Pick two or more files. You can add more later.
Runs on your device. Nothing uploaded.
Or drop files anywhere on this page.
Merging joins two or more PDFs into a single document. Foldline shows every page of every file as a thumbnail, so you can fix the order before you save instead of merging blind and starting over.
When you choose a PDF, your browser reads it into memory and the code on this page edits it there. The file is never sent to Foldline’s servers or to anyone else; you can confirm this by watching the network tab in your browser’s developer tools.
Foldline sets no limit of its own. Because everything happens on your device, very large files are bounded by your browser’s available memory. If a big merge feels slow or fails, try fewer files at a time.
No. Pages are copied into the new document as they are, so text stays selectable and images keep their original quality.
Yes. Remove the pages you don’t want in the thumbnail view before downloading, or use Split & extract to pull a few pages out first.
No. Foldline opens and edits your PDFs with code that runs inside this browser tab. The file is read into your device’s memory, processed there, and handed back to you as a download. Nothing is sent to a server, and closing the tab discards it.
Yes. If a PDF needs a password, Foldline asks for it as soon as you open the file, then works on an unlocked copy inside your browser. You need to know the password: Foldline cannot guess or recover a forgotten one. Use the Remove password tool if you want to save an unlocked copy.