Generate Random Images
Create a random 24-bit BMP image file. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Generate Random Images
- 1. Set the image dimensions. Enter Width (px) and Height (px) to size the generated bitmap. Small sizes like 64x64 generate instantly, larger sizes take a bit longer to fill every pixel.
- 2. Choose noise or rectangles. Turn on Random rectangles instead of noise to get blocky random-colored shapes rather than per-pixel static, useful when you want a more structured-looking test image.
- 3. Download the BMP file. Click download to save the generated 24-bit BMP file to disk, then open it in an image viewer or feed it into whatever pipeline you are testing.
When to use Generate Random Images
Generate Random Images produces a 24-bit BMP file filled with either random pixel noise or random rectangles, useful whenever you need a throwaway image file without a camera or design tool. It runs entirely in your browser.
- Testing an image upload endpoint. You are testing a file upload API that accepts BMP images and need a quick file with real pixel data rather than an empty placeholder to confirm the upload handles it correctly.
- Stress-testing an image processing pipeline. You built a resizing or compression pipeline and want to feed it a batch of randomly sized noise images to check it handles unusual dimensions without crashing.
- Placeholder art for a UI mockup. A gallery layout needs filler thumbnails before real photos are ready. Generating small random rectangle images at consistent dimensions fills the grid quickly.
- Demonstrating BMP file structure. You are teaching how bitmap files store raw pixel data and want a small generated BMP to open in a hex editor alongside the visual result.
Examples
A 64×64 random noise BMP
Output
BMP file
A 128×128 random rectangles BMP
Output
BMP file
About the Generate Random Images tool
Generate Random Images runs as plain JavaScript in your browser tab, with no server behind it. Create a random 24-bit BMP image file. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Random Tools section, 120 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 3 settings, including Width (px), Height (px) and Random rectangles instead of noise, and the result refreshes the moment you change one. The finished file is put together in browser memory and saved with the Download button, so it never touches a server on the way to your disk. 2 worked examples further down the page show exactly what the tool produces for real inputs.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Generate Random Images free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Does the generator send anything to a server?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How do I get a different result?
Run the generator again. Each run is computed fresh on your device, and any options you change are applied to the next result immediately.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I save the output?
Click the Download button once the result is ready. The file is built in your browser's memory and handed straight to your downloads folder, without passing through a server.