How it works
Add PDFs
Drop two or more PDF files into the box above. They are read locally — nothing is uploaded.
Set the order
Use the up/down arrows to arrange your files. The top file becomes the first pages of the merged PDF.
Download
Hit Merge PDFs and download one clean document with all your pages in order. No watermark, ever.
Tips
- Order matters. Double-check the list before merging — fixing the order afterwards means merging again.
- Quality is untouched. Pages are copied as-is, so text stays selectable and images keep full quality.
- Big files are fine. Merging happens on your device, so even hundred-page documents usually merge in seconds on a modern phone or laptop.
- Need it smaller? Run the result through Compress PDF if the merged file is too big to email.
Frequently asked questions
How do I merge PDF files into one?
Add two or more PDF files, arrange them in the order you want with the up/down arrows, then hit Merge PDFs. EzySize joins them into a single PDF in exactly that order and hands you the download.
Is there a limit on how many PDFs I can merge?
There is no fixed file-count limit — you can merge as many PDFs as your device's memory comfortably handles. Most phones and laptops handle dozens of files smoothly.
Will merging change my PDF quality?
No. Pages are copied as-is into the new document, so text stays selectable and images keep their original quality. Nothing is re-rendered.
Are my PDFs uploaded to a server?
No. The entire merge happens inside your browser with a local PDF library. Your files never leave your device, which is why the tool also works offline once the page has loaded.
Can I merge a password-protected PDF?
Password-protected PDFs need to be unlocked first — the merge tool cannot open them without the password. Use a PDF unlocker first, then merge the unlocked file.
Does the merged PDF have a watermark?
Never. EzySize adds no watermarks, no footers and no branding to your files. The output is a clean PDF made only of your pages.