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Bitmap Pixelator

World's simplest bitmap tool
This is a free and fast online utility that adds pixelation to BMP (bitmap) images. You can use the configuration options below to choose the block size and select the bitmap region to pixelate. Extra options allow you to switch between rectangular and oval regions, reverse the coverage to affect the surrounding pixels, and rotate the area before exporting the BMP. Created by graphics designers from team Browserling.
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Click here to select an image from your device, press Ctrl+V to use an image from your clipboard, drag and drop a file from desktop, or load an image from any example below.
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Pixelation Region
Create blocky pixels inside a rectangular bitmap region.
Create blocky pixels inside an oval bitmap region.
Leave the chosen region clear and pixelate the rest of the BMP.
Pixel Block Size
Width and height of each pixelation block.
Increase the size to hide more detail with bigger bitmap blocks.
Pixelation Region Placement
Left offset.
Top offset.
Pixelation region width.
Pixelation region height.
Blank position starts at 0. Blank size reaches the bitmap edge.
Pixelation Region Rotation
Turn the selected region by this many degrees.

What is a Bitmap Pixelator?

learn more about this tool
This online program pixelates BMP (bitmap) images. It replaces fine image detail in the chosen region with larger square blocks of sampled color, creating a mosaic-like version of that part of the bitmap. This makes text, faces, labels, coordinates, signs, and other private visual details harder to recognize, while also giving bitmap photos a retro low-resolution style when used creatively. The pixel size controls how coarse the mosaic becomes: a small value creates a mild block effect, and a large value combines wider parts of the image into bigger square blocks. By default, pixelation is applied inside a rectangular region, but the region can also be oval. The left and top options place the region, the width and height set its size, and empty position or size fields let the region fill the available bitmap space. For exact placement, use the left, top, width, height, and rotation options; for visual editing, drag, resize, or rotate the region directly in the input preview. The outside-region option reverses how the region is used: instead of pixelating the region itself, it keeps that part of the BMP unchanged and pixelates everything around it. Bmp-abulous!

Bitmap Pixelator examples

Click to use
Hide a Beach Name on a Life Ring
In this example, we pixelate the writing on a beach life ring to hide the name of the beach location while keeping the photo itself easy to recognize. We use a rectangular pixelation region at position (84, 274), set its size to 89 by 48 pixels, and apply 20-pixel blocks. This covers the LIDO lettering with a compact mosaic while leaving the railing, sea view, cliffs, and life ring shape unchanged. (Source: Pexels.)
In this example, we pixelate the writing on a beach life ring to hide the name of the beach location while keeping the photo itself easy to recognize. We use a rectangular pixelation region at position (84, 274), set its size to 89 by 48 pixels, and apply 20-pixel blocks. This covers the LIDO lettering with a compact mosaic while leaving the railing, sea view, cliffs, and life ring shape unchanged. (Source: Pexels.)
In this example, we pixelate the writing on a beach life ring to hide the name of the beach location while keeping the photo itself easy to recognize. We use a rectangular pixelation region at position (84, 274), set its size to 89 by 48 pixels, and apply 20-pixel blocks. This covers the LIDO lettering with a compact mosaic while leaving the railing, sea view, cliffs, and life ring shape unchanged. (Source: Pexels.)
Required options
These options will be used automatically if you select this example.
Create blocky pixels inside a rectangular bitmap region.
Leave the chosen region clear and pixelate the rest of the BMP.
Width and height of each pixelation block.
Left offset.
Top offset.
Pixelation region width.
Pixelation region height.
Turn the selected region by this many degrees.
Mask a Cat's Eye Area
In this example, we pixelate the eye area in a cat photo to hide the cat's facial expression and make it hard to tell whether the eyes are open or closed. We use large pixelation blocks that are 30 pixels wide and tall. The effect is applied inside a rectangular region, and we rotate this region by 66 degrees so it follows the diagonal line across the cat's face. (Source: Pexels.)
In this example, we pixelate the eye area in a cat photo to hide the cat's facial expression and make it hard to tell whether the eyes are open or closed. We use large pixelation blocks that are 30 pixels wide and tall. The effect is applied inside a rectangular region, and we rotate this region by 66 degrees so it follows the diagonal line across the cat's face. (Source: Pexels.)
In this example, we pixelate the eye area in a cat photo to hide the cat's facial expression and make it hard to tell whether the eyes are open or closed. We use large pixelation blocks that are 30 pixels wide and tall. The effect is applied inside a rectangular region, and we rotate this region by 66 degrees so it follows the diagonal line across the cat's face. (Source: Pexels.)
Required options
These options will be used automatically if you select this example.
Create blocky pixels inside a rectangular bitmap region.
Leave the chosen region clear and pixelate the rest of the BMP.
Width and height of each pixelation block.
Left offset.
Top offset.
Pixelation region width.
Pixelation region height.
Turn the selected region by this many degrees.
Hide a Sports Car Photo Location
In this example, we use inverted pixelation to hide the shooting location in a street photo. The bright blue sports car is the stylish subject we want to show, but because the photo was taken near home, the storefronts, sidewalk, and street details around it should be harder to identify. We place an oval region around the car, rotate it by 15 degrees, and enable the outside-region mode. With a 5-pixel block size, the car stays sharp while the surrounding location turns into a pixelated mosaic. (Source: Pexels.)
In this example, we use inverted pixelation to hide the shooting location in a street photo. The bright blue sports car is the stylish subject we want to show, but because the photo was taken near home, the storefronts, sidewalk, and street details around it should be harder to identify. We place an oval region around the car, rotate it by 15 degrees, and enable the outside-region mode. With a 5-pixel block size, the car stays sharp while the surrounding location turns into a pixelated mosaic. (Source: Pexels.)
In this example, we use inverted pixelation to hide the shooting location in a street photo. The bright blue sports car is the stylish subject we want to show, but because the photo was taken near home, the storefronts, sidewalk, and street details around it should be harder to identify. We place an oval region around the car, rotate it by 15 degrees, and enable the outside-region mode. With a 5-pixel block size, the car stays sharp while the surrounding location turns into a pixelated mosaic. (Source: Pexels.)
Required options
These options will be used automatically if you select this example.
Create blocky pixels inside an oval bitmap region.
Leave the chosen region clear and pixelate the rest of the BMP.
Width and height of each pixelation block.
Left offset.
Top offset.
Pixelation region width.
Pixelation region height.
Turn the selected region by this many degrees.
All bitmap tools
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Base-64 Encode a Bitmap
Quickly convert a BMP file to the base-64 encoding.
Base-64 Decode a Bitmap
Quickly convert base-64 encoding to a BMP file.
Create a Transparent Bitmap
Quickly convert an opaque bitmap to a transparent bitmap.
Change Bitmap Colors
Quickly substitute one color for another in a bitmap.
Convert a Bitmap to Grayscale
Quickly turn a color bitmap into a grayscale bitmap.
Blur a Bitmap
Quickly blur an area of a bitmap.
Sharpen a Bitmap
Quickly sharpen an area of a bitmap.
Pixelate a Bitmap
Quickly pixelate an area of a bitmap.
Draw a Random Bitmap
Quickly create a bitmap file from random colorful pixels.
Resize a Bitmap
Quickly change the width/height of a bitmap.
Animate Bitmap Sprites
Quickly animate a bitmap sprite sheet.
Coming soon These bitmap tools are on the way
Edit and Draw Bitmaps
Create and edit bitmaps in your browser.
Compress a Bitmap
Make a bitmap smaller in size.
Uncompress a Bitmap
Convert a compressed bitmap to a raw RGB pixel bitmap.
Convert RGB Bitmap to BGR Bitmap
Convert BMP colors in RGB order to BGR order
Convert BGR Bitmap to RGB Bitmap
Convert BMP colors in BGR order to RGB order
Change Bitmap Depth
Change the number of bits per pixel of a bitmap.
Swirl a Bitmap
Create a swirl of any radius in a bitmap.
Make Bitmap Black and White
Reduce all bitmap colors to just black and white.
Merge Bitmaps
Join two or more bitmaps together.
Overlay Bitmaps
Place two or more bitmaps on top of each other.
Split a Bitmap
Split a bitmap into multiple independent bitmaps.
Extract a Bitmap Fragment
Extract one or more selected areas from a bitmap.
Duplicate a Bitmap
Make copies of bitmaps and paste them together.
Rotate a Bitmap
Rotate a bitmap by any angle.
Crop a Bitmap
Select a region from a bitmap.
Skew a Bitmap
Skew a bitmap by an arbitrary angle.
Shift a Bitmap
Shift a bitmap to the left or right.
Add a Border to a Bitmap
Add a border around or inside of a bitmap.
Remove a Border from a Bitmap
Delete a border that surrounds a bitmap.
Flip a Bitmap Vertically
Turn a bitmap upside-down.
Flip a Bitmap Horizontally
Make a mirror copy of a bitmap.
Extract Bitmap Color Palette
Find all colors in a bitmap and extract them.
Convert Bitmap to Byte Array
Create a byte array from a BMP image.
Convert Byte Array to Bitmap
Create a BMP from a byte array.
Convert Bitmap to Webp
Convert a BMP to a Webp.
Convert Webp to Bitmap
Convert a Webp to a BMP.
Convert Bitmap to PNG
Convert a BMP to a PNG.
Convert PNG to Bitmap
Convert a PNG to a BMP
Convert Bitmap to JPEG
Convert a BMP to a JPG.
Convert JPEG to Bitmap
Convert a JPG to a BMP.
Convert Bitmap to BPG
Convert a BMP to a BPG.
Convert BPG to Bitmap
Convert a BPG to a BMP.
Convert GIF to Bitmap
Save GIF frames as BMP images.
Convert BMP to GIF
Convert a bitmap to a single-frame GIF.
Convert Bitmap to Data URI
Create a Data URL scheme of a bitmap.
Convert Data URI to Bitmap
Convert a Data URL scheme back to a bitmap image.
BitBlt Bitmaps
Bit Blit two or more BMPs.
Replace Bitmap Color Index
Put a new color table in a BMP.
Print Bitmap Color Index
Extract the color table of a BMP.
Print Raw Bitmap Pixels
Extract raw RGB pixels from a BMP and print them out as text.
Convert Raw RGB to BMP
Create a bitmap image from raw RGB pixels.
Randomize Bitmap Color Index
Randomly rearrange colors in the BMP color table.
Optimize a Bitmap
Reduce a BMP's memory footprint.
Destroy a BMP
Destroy parts of a bitmap and make it glitchy.
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@browserling
We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling our mission is to make developers' lives easier, so we created this collection of online bitmap tools. Unlike many other tools, we made our tools free, without ads, and with the simplest possible user interface. Our online bitmap tools are actually powered by our programming tools that we created over the last couple of years. Check them out!
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