🏞️ Image Placeholder Generator
Create custom placeholder images at any width and height — choose a background color, text color, and label, then download as PNG, JPEG, or WebP directly in your browser.
About
This tool uses the browser Canvas API to render a solid-color rectangle at the pixel dimensions you specify, then overlays a centered text label — defaulting to the image size, for example 800×600. You can pick any background color and text color via color pickers, type a custom label, and choose PNG, JPEG, or WebP as the output format. The result can be saved as a file or copied as a Base64 data URI for direct embedding in HTML or CSS. Because everything runs client-side, your data never leaves the browser and no account or server is needed.
How to use
- Enter the desired width and height in pixels (up to 4000 each).
- Choose a background color and a text color using the color pickers.
- Type a custom label, or leave it empty to display the image dimensions automatically.
- Select the output format — PNG, JPEG, or WebP — and check the live canvas preview.
- Click Download to save the image file, or copy the Base64 data URI to embed it directly in code.
FAQ
- What is a placeholder image?
- A placeholder image is a temporary stand-in graphic used during web or app development to reserve layout space before the real image is ready — common in wireframes, prototypes, and HTML templates.
- Is there a maximum image size?
- The generator supports up to 4000×4000 pixels. Beyond that, browser canvas memory limits may cause errors. For most development use cases 4000 px per side is more than enough.
- What is a Base64 data URI and when should I use it?
- A Base64 data URI encodes the image as a text string you can paste directly into an img src attribute or a CSS background-image value, eliminating the need for a separate image file. Best for small images in prototypes or emails.
- Which output format should I choose — PNG, JPEG, or WebP?
- Choose PNG for lossless quality and transparency support, JPEG for smaller file sizes when transparency is not needed, and WebP for the best balance of size and quality in modern browsers.
- Does this tool upload my data to a server?
- No. The image is generated entirely in your browser using the Canvas API and never transmitted to any server. No login, no upload, no data collection.