What this tool does
When a form allows only one file but you have three PDFs, merge them. Choose the PDFs, set their order and get one combined PDF. All pages keep their original quality, and nothing leaves your device.
How to use it
- Choose two or more PDF files.
- Put them in order with the arrows.
- Tap Merge PDF.
- Download your combined file.
Why 123ToolBox
Your files stay with youEverything happens inside your browser. Nothing is uploaded to us or anyone else.
Free, no watermarkEvery tool is free. Your result has no logo or watermark.
No sign-upOpen the page and use it. No account, no email.
Made for phonesWorks on cheap Android phones as well as laptops.
FastNo upload or download wait. Small files finish in seconds.
Sharp pagesPages and photos keep their quality. Nothing is squashed unless you ask.
Questions people ask
How do I combine PDF files into one?
Choose all the PDFs, set the order and tap Merge PDF.
Is there a limit on files?
No fixed limit. Very large PDFs may be slow on older phones.
Can I merge password-protected PDFs?
Not yet. Remove the password first.
Are my files uploaded?
No. Merging happens on your device.