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Bitmap Color Replacer

World's Simplest Bitmap Tool

This is a free and fast online utility that changes one color into another in BMP images. You can use the configuration options (below) to choose the original color and set the replacement color. Extra options allow you to adjust how closely nearby color tones should be matched, preserve light and dark details, smooth recolored pixel edges, and preview the matched pixels before saving the B. Created by graphics designers from team Browserling.

Bitmap Color Replacer

World's Simplest Bitmap Tool

This is a free and fast online utility that changes one color into another in BMP images. You can use the configuration options (below) to choose the original color and set the replacement color. Extra options allow you to adjust how closely nearby color tones should be matched, preserve light and dark details, smooth recolored pixel edges, and preview the matched pixels before saving the B. Created by graphics designers from team Browserling.

Tool Options

Colors to Replace

Bitmap color that should be replaced. You can also click a pixel in the input BMP preview.
New color that should replace the selected bitmap color.
Include nearby tones of the old color. Higher values match more shadows and highlights.

Color Detail

Preserve each matched pixel's brightness so texture and shading remain visible after recoloring.

Pixel Boundary

Blend pixels along the border between replaced and unchanged bitmap areas.
Boundary smoothing radius in pixels.

Color Preview

Preview the pixels selected for replacement. Black means matched and white means unchanged.

What Is a Bitmap Color Replacer?

This free online browser-based program changes colors in BMP (bitmap) images. It looks through every pixel in the bitmap, finds the color you want to replace, and repaints those pixels with the new color you choose. The old and new colors can be entered as simple color names, hex values, or RGB values, and you can also click directly on a pixel in the input bitmap to copy its color into the tool settings. If the color in your BMP is not perfectly flat, use the similarity percentage to include nearby tones as well. For example, replacing blue with green can also catch dusty blue, pale blue, navy shadows, and other bluish pixels when the percentage is increased. If light and dark areas define the shape, depth, or texture of the object, the option that keeps color details can preserve this visual information during recoloring. It keeps the original brightness of each matched pixel, so shadows, highlights, rounded edges, and surface details are carried into the new color. If small old-color specks remain around the border of the recolored region, enable boundary smoothing and set a small radius to blend the edge pixels. The preview mask option shows the matched pixels in black and the unchanged pixels in white, which makes it easy to tune the color and similarity before saving the final BMP. Additionally, this mask can be imported into Photoshop or GIMP and used for further editing, masking, or cleanup. Bmp-abulous!

What Is a Bitmap Color Replacer?

This free online browser-based program changes colors in BMP (bitmap) images. It looks through every pixel in the bitmap, finds the color you want to replace, and repaints those pixels with the new color you choose. The old and new colors can be entered as simple color names, hex values, or RGB values, and you can also click directly on a pixel in the input bitmap to copy its color into the tool settings. If the color in your BMP is not perfectly flat, use the similarity percentage to include nearby tones as well. For example, replacing blue with green can also catch dusty blue, pale blue, navy shadows, and other bluish pixels when the percentage is increased. If light and dark areas define the shape, depth, or texture of the object, the option that keeps color details can preserve this visual information during recoloring. It keeps the original brightness of each matched pixel, so shadows, highlights, rounded edges, and surface details are carried into the new color. If small old-color specks remain around the border of the recolored region, enable boundary smoothing and set a small radius to blend the edge pixels. The preview mask option shows the matched pixels in black and the unchanged pixels in white, which makes it easy to tune the color and similarity before saving the final BMP. Additionally, this mask can be imported into Photoshop or GIMP and used for further editing, masking, or cleanup. Bmp-abulous!


Bitmap Color Replacer Examples

Click to try!
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Change a Bouquet Background

In this example, we give a yellow flower bouquet a new bitmap background. We click the pale background in the input image to pick rgba(251, 244, 238, 255) as the color to replace, set the color sensitivity to 15%, and enter rgb(210, 177, 233) as the replacement color. We also smooth the boundary with a 1-pixel radius, which gently blends the tiny edge pixels into the new lavender background. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Bitmap color that should be replaced. You can also click a pixel in the input BMP preview.
New color that should replace the selected bitmap color.
Include nearby tones of the old color. Higher values match more shadows and highlights.
Preserve each matched pixel's brightness so texture and shading remain visible after recoloring.
Blend pixels along the border between replaced and unchanged bitmap areas.
Boundary smoothing radius in pixels.
Preview the pixels selected for replacement. Black means matched and white means unchanged.
click me

Turn a Red Card Suit Black

In this example, we recolor the red suit on a bitmap playing card. The input image contains a red ace of hearts, and the tool replaces its bright heart color with black. A 50% sensitivity value also catches the nearby red antialiasing pixels, so the heart symbol and the letter A become black while the white card faces stay unchanged. (Source: Vecteezy.com.)

Required options
These options will be used automatically if you select this example.
Bitmap color that should be replaced. You can also click a pixel in the input BMP preview.
New color that should replace the selected bitmap color.
Include nearby tones of the old color. Higher values match more shadows and highlights.
Preserve each matched pixel's brightness so texture and shading remain visible after recoloring.
Blend pixels along the border between replaced and unchanged bitmap areas.
Boundary smoothing radius in pixels.
Preview the pixels selected for replacement. Black means matched and white means unchanged.
click me

Make a 3D Smiley Magenta

In this example, the bitmap contains two glossy smiley balls, one blue and one yellow. We choose the yellow smiley's base color rgba(164, 173, 18, 255), and change it to magenta with 40% sensitivity. To keep the smiley looking round and three-dimensional, we enable the option that preserves light and dark color details. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Bitmap color that should be replaced. You can also click a pixel in the input BMP preview.
New color that should replace the selected bitmap color.
Include nearby tones of the old color. Higher values match more shadows and highlights.
Preserve each matched pixel's brightness so texture and shading remain visible after recoloring.
Blend pixels along the border between replaced and unchanged bitmap areas.
Boundary smoothing radius in pixels.
Preview the pixels selected for replacement. Black means matched and white means unchanged.

All Bitmap Tools

Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!
Quickly convert an opaque bitmap to a transparent bitmap.
Quickly substitute one color for another in a bitmap.
Quickly find all colors in a bitmap and extract them.
Quickly change the number of bits used by every BMP pixel.
Quickly turn a color bitmap into a grayscale bitmap.
Quickly animate a bitmap sprite sheet.
Quickly convert an animation into a bitmap sprite sheet.
Quickly blur an area of a bitmap.
Quickly sharpen an area of a bitmap.
Quickly pixelate an area of a bitmap.
Quickly create a bitmap file from random, colorful pixels.
Quickly change the width/height of a bitmap.
Quickly select a region from a bitmap.
Quickly rotate a bitmap by any angle.
Quickly flip a bitmap image horizontally.
Quickly flip a bitmap image vertically.
Quickly add a border around or inside a bitmap.
Quickly delete a border that surrounds a bitmap.
Quickly create a byte array from a BMP image.
Quickly create a BMP image from a byte array.
Quickly convert RGB bitmap colors to BGR channel order.
Quickly convert BGR bitmap colors to RGB channel order.
Quickly create a BMP image by mapping text symbols to colored pixels.
Quickly convert a BMP file to the base-64 encoding.
Quickly convert base-64 encoding to a BMP file.

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.

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.

Skew a Bitmap

Skew a bitmap by an arbitrary angle.

Shift a Bitmap

Shift a bitmap to the left or right.

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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Created with love by

We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling, we love to make people's lives easier, so we created this collection of online bitmap tools. Our BMP tools have the simplest possible user interface and work directly in your browser without downloads or installations. You can use them to edit bitmap images, change BMP bit depth and colors, resize bitmaps, create transparent BMPs, work with bitmap pixels and byte arrays, and much more. Behind the scenes, our bitmap tools are powered by our web developer tools that we've created over the years. Check them out!

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