If you sell online on Facebook Marketplace, ikman.lk, Instagram or WhatsApp, you’ve probably seen your product photos turn up in someone else’s post. Copied photos make a shop look less trustworthy, and scammers use them to “sell” items they don’t have. A watermark, your name written on the photo, shows where the picture came from and makes copying much less attractive.
What should your watermark say?
- Your shop or page name, for example © Your Shop Name. It tells buyers where to find you and is hard to pass off as someone else’s.
- Or your website or page address, if it’s short.
- Avoid your phone number. Numbers change and invite spam calls, while your page name lasts.
- Keep it short. Two to four words are easy to read on a phone screen.
Where to put it
| Position | Good | Not so good |
|---|---|---|
| Bottom-right corner | Clean and professional, doesn’t cover the product | Easy to crop out |
| Centre (diagonal) | Hard to remove, still looks tidy | Covers part of the product |
| Repeated across the photo | Hardest to remove | Most distracting |
A good balance for product photos is a centre, diagonal watermark at about 25–40% opacity: buyers can still see the product clearly, but cropping it out is impossible. Save the repeated pattern for photos that are often stolen.
How to watermark many photos at once
- Open Watermark Image.
- Type your watermark text.
- Choose the position, direction, colour, size and opacity. The preview updates as you change them.
- Choose your photos. You can select many at once, and they all get the same watermark.
- Click Download. Several photos come together in one ZIP file.
Make it readable on any photo
- Use white text on dark photos and dark text on light photos.
- Make it big enough to read on a phone, but not so big that it hides the product.
- Use the same style on all your photos. It makes your shop look consistent and professional.
- Keep your original photos without a watermark, in case you need them later for printing or a different design.
Watermark copies of your ID before you send them
This is one of the most useful tricks for everyone, not just sellers. Before sending a copy of your NIC, passport or bank book, add a watermark that says what it’s for and when, for example “Only for ABC Bank account opening – 13/11/2026”. If the copy leaks, it’s much harder to reuse for a loan, SIM card or fake account. For PDF copies, use Watermark PDF.
Common questions
Will watermarking reduce my photo quality?
No. Photos keep their full size. JPG photos are saved at high quality, and PNG photos without any loss.
Can I add my logo as a watermark?
ToolNest adds text watermarks. Using © with your shop name works well and is clear at any size.
Are my photos uploaded?
No. The watermark is added inside your browser, so your photos never leave your device.
Can I watermark photos on my phone?
Yes. Open Watermark Image in your phone's browser, choose photos from your gallery, and the results are saved to your downloads.