What is the Dummy Image Generator?#
The Dummy Image Generator creates placeholder images in any width and height, with a theme, a wireframe pattern, and a text label. A transparent background is also available. The image is drawn in your browser, so nothing is uploaded.
You can also pad the file to an exact size.
How to Use#
- Pick a preset or set the width and height.
- Choose a theme and a pattern, and turn on the transparent background if needed.
- Edit the label text if needed.
- Choose PNG, JPG, or WebP.
- Select a target file size if needed, then download the image.
The label starts as the image dimensions, such as "1200 × 630". Once you edit it, it stays as typed until you reset the settings.
Options#
- Size: presets for common uses, such as Social card (1200 × 630), Full HD (1920 × 1080), and Avatar (512 × 512), or a custom width and height from 1 to 4096 px.
- Theme: Choose from four themes. Each sets the background color, the label color, and the pattern line color. With the transparent background on, the background color is not drawn, and the label text and pattern lines keep their theme colors.
- Wireframe pattern: draws guide lines in the theme's line color. Choose Flat (no pattern), Diagonal, Grid, or Corner frame.
- Border: adds a frame inside the image edge in the theme's line color. It can be combined with any pattern.
- Label: the text in the center, up to 100 characters. It defaults to the image dimensions, and an empty field leaves the image without a label.
- Format: PNG, JPG, or WebP. JPG cannot store transparency.
- Target file size: None, presets from 500 KB to 10 MB, or a custom value between 0.1 MB and 50 MB. The file is padded to exactly that size.
Common Use Cases#
- Filling image slots in a mockup or prototype.
- Registering a placeholder in a CMS before the real photo is ready.
- Checking how an app behaves near an upload limit, such as a 2 MB cap or a 5 MB rejection.
- Serving a file of a known size for a network load test.
- Checking how a transparent PNG or WebP looks on a colored page.
FAQ#
Yes. The extra data is stored in a part of the file that image viewers skip, so the picture looks the same and opens as usual.
Yes. 1 MB counts as 1,048,576 bytes. If the image is already larger than the target, the tool keeps the original size and shows a warning instead.
Reduce the width and height, or select a larger target size. The encoded image is already bigger than the target, so there is no room to add data.
PNG or WebP. JPG cannot store transparency, so the transparent option is disabled while JPG is selected.
Notes#
- Padding changes only the file size. The width and height in pixels stay the same.
- Large images take longer to draw. If the image cannot be generated, try a smaller width and height.