# Image Watermark Tool — Text or Logo, in Bulk

> Stamp text or a logo across your images, one at a time or a whole batch.

To watermark images, add your photos, type the text or upload a logo, then choose where it sits and how transparent it should be. The size is set as a percentage of each image, so a batch of mixed dimensions gets a proportional mark rather than one that is huge on some and invisible on others. Everything is composited in your browser.

**URL:** https://convertto.tech/t/image-watermark
**Category:** Image Tools (https://convertto.tech/c/image-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Batch:** One watermark applied across any number of images at once
- **Privacy:** Photos are composited in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Select your images — the file stays on your device and is never uploaded.
2. Enter or paste your watermark text.
3. Select your logo image — the file stays on your device and is never uploaded.
4. Choose the position.
5. Set the size.
6. Set the opacity.
7. Set the rotation.
8. Pick the text colour.
9. Set the edge margin.
10. Turn "Drop shadow behind the text" on or off as needed.
11. Choose the output format.
12. Set the quality.
13. Press Run, then download the result when it is ready.

## FAQ

### Can a watermark be removed from my image?

Yes, by anyone determined enough — a corner watermark crops off in seconds and inpainting tools erase the rest. A tiled semi-transparent watermark across the whole frame is far harder to remove cleanly, which is why stock libraries use exactly that. Treat a watermark as a deterrent and an attribution, not as protection.

### Why is my watermark invisible on some photos?

White text at 45% opacity disappears over a bright sky. Switch on the drop shadow, which keeps light text readable over light backgrounds, or pick a colour with more contrast against the images you are actually marking.

### Does watermarking reduce image quality?

Only through re-encoding. Keeping the format as PNG or WebP is lossless; a JPG is decoded and re-encoded, which loses a little. Set quality to 95 or higher and the difference is not visible, or export as WebP to avoid the question.

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