# Watermark Tool Guide

Draw a text watermark onto a picture, choosing the corner, size, colour and opacity.

- Tool: https://ilham.dev/tools/watermark-tool/
- Guide URL: https://ilham.dev/guides/watermark-tool/
- Tool guides index: https://ilham.dev/guides/tools/
- Broader guide: Practical Image Tools (https://ilham.dev/guides/practical-image-tools/)

## What it does

Put a name, a site or a date onto a picture so it travels with the image. You choose a corner, a size as a share of the shorter side, a colour and an opacity, and the text is drawn into the pixels when you download.

## Use the tool

Open https://ilham.dev/tools/watermark-tool/, add the input the tool asks for, run it, and check the output before using it elsewhere.

## Input and output

- Input: text.
- Output: text.
- Category: Web.

## Privacy and processing
Processing happens locally in your browser. This tool does not upload the input to ilham.dev.

## Questions

### How large should the watermark be?

Four per cent of the shorter side is small enough to stay out of the way but large enough to read on a phone. Raise it toward ten per cent when the picture will be shown at a large size.

### Why is there a dark outline?

White text disappears on a bright sky and black text disappears in shadow. A thin dark stroke around the letters keeps them readable on either, and it can be turned off when the background is known.

### Can someone remove the watermark?

The text is part of the pixels rather than a separate layer, so removing it means editing the image. A determined person still can, which is why a watermark deters rather than prevents.