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Bitmap Border Remover

World's simplest bitmap tool
This is a free and fast online utility that removes borders from BMP (bitmap) images. You can use the configuration options (below) to set a removal width for the left, right, top, and bottom sides, or adjust the border boundary directly in the preview. Extra options allow you to select a rectangular or round border shape, choose the background color around a circle or oval, and send the result back for another border-removal pass. 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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Border Widths
Pixels from the left.
Pixels from the right.
Pixels from the top.
Pixels from the bottom.
Border Shape
Trim a rectangular or square frame around the bitmap.
Trim a circular or oval rim around the bitmap.
Fill the corners outside the round picture with this color.
Removal in Stages
Unlock the "Trim border again" button. It returns the borderless BMP to the input side for one more edge adjustment.

What is a Bitmap Border Remover?

learn more about this tool
This free online browser-based program removes borders from BMP images by trimming pixels from the left, right, top, and bottom edges. Enter the number of pixels to remove from each side, and the tool keeps the remaining area as a new BMP. Each side is controlled independently, so you can remove an even frame, uneven scanner margins, narrow sidebars, or a decoration that appears along only one edge. Leave a side empty or set it to zero when no trimming is needed there. You can also adjust the border removal directly in the input preview by moving and resizing the selection. Use a rectangular shape to remove a straight-sided frame around a square or rectangular picture. Use a round shape when the inner picture is circular or oval. In round mode, the curved crop exposes the four canvas corners, which can be filled with the selected background color. For wide or irregular borders, enable another trimming pass and click "Remove Border Again" to return the current result to the input side for further adjustment. To add a new frame instead, open our Add a Border to a Bitmap tool. Bmp-abulous!

Bitmap Border Remover examples

Click to use
Remove Padding from a Pastel Painting
This example removes the white padding around an abstract painting in soft pink, blue, and violet colors. The padding is 30 pixels wide on every side, so we set all four widths to 30 and use the rectangular shape. The output canvas ends exactly at the edges of the pastel artwork. (Source: Pexels.)
This example removes the white padding around an abstract painting in soft pink, blue, and violet colors. The padding is 30 pixels wide on every side, so we set all four widths to 30 and use the rectangular shape. The output canvas ends exactly at the edges of the pastel artwork. (Source: Pexels.)
This example removes the white padding around an abstract painting in soft pink, blue, and violet colors. The padding is 30 pixels wide on every side, so we set all four widths to 30 and use the rectangular shape. The output canvas ends exactly at the edges of the pastel artwork. (Source: Pexels.)
Required options
These options will be used automatically if you select this example.
Pixels from the left.
Pixels from the right.
Pixels from the top.
Pixels from the bottom.
Trim a rectangular or square frame around the bitmap.
Remove a Margin from a Flower Photo
In this example, we remove a dark semi-transparent margin from a BMP photo of purple anemone flowers. The margin is located inside the image and is overlaid directly on top of its pixels, so the flower photograph remains faintly visible through it. Its width is uneven: the left and right sections are 20 pixels wide, while the top and bottom sections are 40 pixels wide. We use the rectangular shape to cut off the overlaid edge areas and keep the clear inner part of the BMP. (Source: Pexels.)
In this example, we remove a dark semi-transparent margin from a BMP photo of purple anemone flowers. The margin is located inside the image and is overlaid directly on top of its pixels, so the flower photograph remains faintly visible through it. Its width is uneven: the left and right sections are 20 pixels wide, while the top and bottom sections are 40 pixels wide. We use the rectangular shape to cut off the overlaid edge areas and keep the clear inner part of the BMP. (Source: Pexels.)
In this example, we remove a dark semi-transparent margin from a BMP photo of purple anemone flowers. The margin is located inside the image and is overlaid directly on top of its pixels, so the flower photograph remains faintly visible through it. Its width is uneven: the left and right sections are 20 pixels wide, while the top and bottom sections are 40 pixels wide. We use the rectangular shape to cut off the overlaid edge areas and keep the clear inner part of the BMP. (Source: Pexels.)
Required options
These options will be used automatically if you select this example.
Pixels from the left.
Pixels from the right.
Pixels from the top.
Pixels from the bottom.
Trim a rectangular or square frame around the bitmap.
Remove a Border from a Round Bitmap
In this example, we remove the dark teal border around a round BMP photograph of an ocean wave. The border is 13 pixels wide on every side, so we enter 13 for all four widths and select the round shape. We also set the background to white, which fills the four corners outside the circular photo. (Source: Pexels.)
In this example, we remove the dark teal border around a round BMP photograph of an ocean wave. The border is 13 pixels wide on every side, so we enter 13 for all four widths and select the round shape. We also set the background to white, which fills the four corners outside the circular photo. (Source: Pexels.)
In this example, we remove the dark teal border around a round BMP photograph of an ocean wave. The border is 13 pixels wide on every side, so we enter 13 for all four widths and select the round shape. We also set the background to white, which fills the four corners outside the circular photo. (Source: Pexels.)
Required options
These options will be used automatically if you select this example.
Pixels from the left.
Pixels from the right.
Pixels from the top.
Pixels from the bottom.
Trim a circular or oval rim around the bitmap.
Fill the corners outside the round picture with this color.
Remove Empty Space Above a Building
This example removes a large area of empty sky above a geometric building. We cut 150 pixels from the top of the BMP and leave the left, right, and bottom sides unchanged. This turns the 300-by-450-pixel portrait image into a compact 300-by-300-pixel square. (Source: Pexels.)
This example removes a large area of empty sky above a geometric building. We cut 150 pixels from the top of the BMP and leave the left, right, and bottom sides unchanged. This turns the 300-by-450-pixel portrait image into a compact 300-by-300-pixel square. (Source: Pexels.)
This example removes a large area of empty sky above a geometric building. We cut 150 pixels from the top of the BMP and leave the left, right, and bottom sides unchanged. This turns the 300-by-450-pixel portrait image into a compact 300-by-300-pixel square. (Source: Pexels.)
Required options
These options will be used automatically if you select this example.
Pixels from the left.
Pixels from the right.
Pixels from the top.
Pixels from the bottom.
Trim a rectangular or square frame around the bitmap.
All bitmap tools
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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.
Extract Bitmap Color Palette
Quickly find all colors in a bitmap and extract them.
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.
Crop a Bitmap
Quickly select a region from a bitmap.
Rotate a Bitmap
Quickly rotate a bitmap by any angle.
Add a Border to a Bitmap
Quickly add a border around or inside a bitmap.
Remove a Border from a Bitmap
Quickly delete a border that surrounds a bitmap.
Animate Bitmap Sprites
Quickly animate a bitmap sprite sheet.
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.
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.
Skew a Bitmap
Skew a bitmap by an arbitrary angle.
Shift a Bitmap
Shift a bitmap to the left or right.
Flip a Bitmap Vertically
Turn a bitmap upside-down.
Flip a Bitmap Horizontally
Make a mirror copy of a bitmap.
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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