The Helpdf PDF merger joins several PDF documents into a single file while keeping their original quality, links and text. Reorder the files with the arrows before merging. Because everything runs inside your browser, your invoices, contracts and personal documents stay on your computer.
How to merge PDF files
Select your file
Click the button or drag and drop your file into the box.
Choose your options
Adjust the settings if needed — the defaults work for most files.
Download the result
Your new file is created instantly in your browser. Click Download.
Frequently asked questions
Is there a limit on the number of files?
No fixed limit. You can merge dozens of PDFs; the only limit is your device’s memory.
Are my files safe?
Yes. With Helpdf, your files stay on your device. They are never sent to our servers, nobody else can see them and nothing is stored.
Is Helpdf free?
Yes, every tool is completely free with no sign-up and no watermark. The site is funded by advertising.
Does it work on phone?
Yes. Helpdf works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. Very large files may be slower on older phones.