Marking a document as a draft, confidential, or branding it with your company logo usually means opening a desktop app. With PDF42 you can stamp a watermark across every page right from your Android phone.
Add a watermark in 4 steps
- Open Add WatermarkIn PDF42, open Tools and tap Add Watermark.
- Pick the PDFChoose the file you want to stamp.
- Set text or imageType a watermark like "DRAFT" or pick an image, then set its position and opacity.
- Save the watermarked fileSave or share the stamped PDF.
Many free watermarking tools stamp their own logo onto your document as the price of using them for free. PDF42 only adds the watermark you choose — on-device, with no upload and no PDF42 branding forced onto your file.
Watermark your PDF now
Your text or image only — on-device, no forced branding.
Get PDF42 on Google PlayCan I use my own logo image?
Yes. Alongside text watermarks, you can pick an image from your phone — a logo, stamp, or signature graphic — and place it on every page.
Can I control how visible the watermark is?
Yes. You can adjust opacity so the watermark sits subtly behind the content, or set it fully opaque if you want it to stand out clearly.