How to use Add Text to Image
Adding text to an image is one of the most common quick-edit tasks: a caption for a screenshot, a watermark on a photo, a title on a thumbnail, or a label on a diagram. This tool lets you type your text and place it anywhere on the image with live preview, adjusting the size as a percentage of the image width, the colour, and an optional dark outline that keeps light text readable over busy areas. Everything is drawn on a canvas in your browser at full resolution, so the download is pixel-sharp and your image never leaves your device.
- Drop an image onto the upload area or click to browse.
- Type your caption or watermark text.
- Set the size, colour, and position with the controls.
- Toggle the dark outline on for light text over busy areas.
- Click Download Image to save the result as a PNG.
Your data never leaves your device — 100% private processing.
Choosing size, colour, and placement
Because the text size is expressed as a percentage of the image width, the same setting looks consistent whether your image is 600px or 4000px wide — a 6% caption is always roughly proportional. For colour, pick a shade that contrasts with the area behind the text; white or black covers most cases, and the dark outline lets white text survive over a bright sky or busy crowd. Placement matters too: captions usually read best near the top or bottom edge, while watermarks are often tucked into a corner or stretched across the centre of the image so they cannot be cropped away easily.
| Goal | Size | Placement |
|---|---|---|
| Screenshot caption | 5–7% | Top or bottom centre |
| Corner watermark | 3–4% | Bottom-right |
| Thumbnail title | 10–18% | Centre or lower third |
Watermarks versus captions
A caption communicates information and is meant to be read clearly, so it sits in clean space with good contrast. A watermark is meant to claim ownership and resist removal, so it is often semi-deliberately placed over important detail and may use a subtle colour. This tool handles both: for a caption, keep the text small and tidy at an edge; for a watermark, increase the size, place it across the subject, and rely on the outline so it reads on any background. Either way the text is flattened into the pixels on download, so it becomes a permanent part of the image rather than a removable layer.
Worked examples
Photo watermark
Inputs: Photo · 4% · bottom-right
Result: Subtle ownership mark
Thumbnail title
Inputs: Image · 14% · centre
Result: Bold readable headline
Glossary
- Caption
- Readable text added to describe or label an image.
- Watermark
- Text or a mark placed on an image to claim ownership.
- Outline
- A contrasting stroke around text that aids legibility.
- Canvas
- The browser element where the text is drawn onto the image.
Related reading
Frequently Asked Questions
Why use Add Text to Image?
- Position the caption anywhere with horizontal and vertical sliders
- Size scales with the image so text looks right at any resolution
- Optional dark outline keeps light text legible over busy photos
- Renders and exports locally — the image is never uploaded
Common use cases
- Captioning a screenshot before sharing it in a chat or post
- Watermarking a photo with your name or website
- Adding a bold title to a YouTube or blog thumbnail
- Labelling a diagram or product photo with a short note
- Creating a simple quote graphic for social media
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