Uwarp

Adjust options below to generate a random bitmap.

Image size: 320 × 320 px

Width (squares)
Height (squares)
Size of squares (px)
White adjust

Help Us Improve

—

(—)

Random bitmap generator online

Use this bitmap generator to create random pixel generator patterns in grayscale, black and white, or random color pixels. Preview and download PNG online.

What is a random bitmap?

A random bitmap is an image built from independent random values per grid cell. This page works as a bitmap generator and random pixel generator, filling each square with black/white, grayscale, or random color pixels, then scaling each cell to the pixel size you choose. Adjust white or channel sliders to bias toward lighter tones, click Generate again for a new pattern, and download PNG in your browser.

Random bitmap features

Procedural random pixel generator grids in the browser.

  1. Grid controls: Width and height in squares plus pixel size per cell.
  2. Greyscale or color: Black-and-white noise, grayscale static, or RGB random squares.
  3. Two or full range: Binary 2-value cells or all 256 levels per channel.
  4. Tone adjusts: White and per-channel sliders bias brightness.
  5. Generate again: Re-roll the random pattern without changing settings.
  6. PNG download: Save as random-bitmap.png.

How to create a random bitmap

Steps for online bitmap generator output.

  1. Set grid dimensions: Choose how many squares wide and tall, and how many pixels each square spans.
  2. Pick color mode: Greyscale for static noise; color for RGB random art.
  3. Tune adjusts: Raise white adjust for lighter noise; use channel adjusts in color mode.
  4. Download PNG: Export the grid for textures, placeholders, or glitch backgrounds.

Tips for random bitmaps

Better procedural bitmap generator grids.

  1. Start small: 32×32 squares at 10 px is a readable default before scaling up.
  2. Large squares: Fewer, bigger blocks read as mosaic tiles rather than fine static.
  3. 2 values for harsh noise: Binary mode mimics TV static or dithered black-and-white.
  4. Watch the size readout: Keep total pixels under 8192 per edge to avoid validation errors.
  5. Re-roll often: Use Generate again until the pattern fits your mockup.
  6. Export PNG: Lossless PNG preserves hard square edges.

When to use random bitmaps

Typical uses for procedural pixel grids.

  1. Placeholder textures: Quick noisy fills for mockups and loading states.
  2. Glitch aesthetics: Color or B&W blocks for retro UI backgrounds.
  3. Test patterns: Random grids to stress-test image pipelines.
  4. Pixel art seeds: Start from random color squares and edit further.
  5. Dither experiments: Binary 2-value mode for harsh black-and-white noise.
  6. Teaching randomness: Show how grid size changes the look of aleatory pixels.

Why use this bitmap generator

Benefits of browser-based random grids.

  1. No upload needed: Generate from settings only—no source photo required.
  2. Private: Pixels are created on your device.
  3. Free: Unlimited generations and downloads.
  4. Instant preview: See the grid as soon as options change.
  5. Crisp squares: Pixelated rendering keeps block edges sharp in preview.
  6. Honest scope: Uniform random cells—not Perlin noise or seamless tiles.

Technical details

How random bitmap generation works here.

  1. Grid model: Each cell shares one random RGB triplet across its square pixels.
  2. Randomness: Math.random() per cell; Generate again re-seeds by re-running.
  3. Adjust math: Linear blend of each channel toward 255 by adjust percent.
  4. Output cap: 8192 px maximum width or height.
  5. Rendering: Canvas ImageData fill with pixelated preview CSS.
  6. Browser support: Chromium, Firefox, Safari with Canvas 2D.

Frequently Asked Questions

Have questions? We have answers.

Related tools

More tools from Image & Conversion.

View all Image & Conversion