PDF Fox
Merge, split, sign, fill, compress, lock and convert PDFs on Android with no watermark stamped on the result. Files never leave your phone.
π¦ Edit a PDF on your phone without a watermark on the result
The usual Android PDF story: you merge two files, and the free version stamps its logo across every page. This one does the job and hands the file back clean, and it does it on the phone rather than on somebody else's server.
What it does
- Merge, split, rotate, reorder and delete pages.
- Sign a document and fill in form fields with a finger.
- Compress large files, and convert to and from Word and Excel.
- Lock a PDF with a password, or unlock one you have the password for.
- Everything happens on the device β nothing is uploaded.
Who it is for
Anyone who has to sign or merge something away from a computer, and anyone who does not want a contract passing through an unknown web converter.
What to check before a document goes into any PDF tool
Most free PDF tools are websites, and a website cannot edit your file without receiving it first. For a holiday itinerary that is fine. For a signed contract, a payslip or a passport scan it is a decision worth making deliberately rather than by habit.
- Does the file leave the device? If the tool is a web page, the answer is yes, whatever the landing page says about privacy. Something on the phone that works with flight mode on cannot be uploading anything.
- How long do they keep it? Services that delete after an hour are common and better than nothing, but it still means your document sat on someone else's disk.
- Is the result watermarked, or page-limited? Plenty of tools let you do the work and then stamp the output or cap it at three pages, which you discover after you have already handed over the file.
- Does signing mean anything here? Drawing your name on a page is an image of a signature. That is accepted for most everyday purposes, but it is not the same as a cryptographic digital signature, and it is worth knowing which one you have been asked for.
The simplest way to avoid all four questions is to do the work on the phone. If nothing is uploaded there is nothing to keep, nothing to leak and nobody to trust.
Questions people ask
How do I merge PDFs without a watermark?
Use a tool that does the work on the device and does not monetise by branding the output. Merge the files, then check page one and the last page of the result before you send it.
Do my files get uploaded?
No. Processing happens on the phone, which is why it also works with no connection.
Can I sign a PDF on Android?
Yes β draw the signature once, place it where it belongs, and export. The signature is drawn into the file, so it survives being emailed.