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Bitmap Border Maker

World's Simplest Bitmap Tool

This is a free and fast online utility that adds borders to BMP (bitmap) images. You can use the configuration options (below) to place the border inside, outside, or across the edge of the bitmap, set a separate width for each side, and choose the border color. Extra options allow you to round the frame corners and fill the exposed corner areas with a custom background color. Created by graphics designers from team Browserling.

Bitmap Border Maker

World's Simplest Bitmap Tool

This is a free and fast online utility that adds borders to BMP (bitmap) images. You can use the configuration options (below) to place the border inside, outside, or across the edge of the bitmap, set a separate width for each side, and choose the border color. Extra options allow you to round the frame corners and fill the exposed corner areas with a custom background color. Created by graphics designers from team Browserling.

Tool Options

Border Placement

Draw the border beyond the BMP edge and enlarge the canvas.
Put one half of the border inside and the other half outside.
Draw the border over the edge pixels without resizing the BMP.

Border Width

Border pixels on the left.
Border pixels on the right.
Border pixels at the top.
Border pixels at the bottom.
Set a side to 0 to leave that bitmap edge unchanged.

Border Color

Set the color for the bitmap border.
Use a color name, hex code, RGB value, or palette color.

Border Shape

Set a separate radius for each border corner.
Top-left radius.
Top-right radius.
Bottom-left radius.
Bottom-right radius.
Set the color outside the rounded border corners.

What Is a Bitmap Border Maker?

This free online browser-based program draws a customizable border on a BMP image. The border can sit outside the bitmap, run through its edge, or cover pixels just inside it. An outside border leaves the original picture untouched and expands the canvas by the amount entered for each side. A centered border divides every side width between the existing bitmap and the added canvas. An inside border paints over edge pixels and keeps the BMP at its original dimensions. The left, right, top, and bottom widths are controlled independently, so the frame can be even, asymmetrical, or limited to just one or two edges. Enter zero for any side that should remain borderless. The border color accepts a color name, hex code, RGB value, or a selection from the attached palette. You can also round each of the four border corners separately by entering an individual radius for the top-left, top-right, bottom-left, and bottom-right corners. When the border corners are rounded, the exposed canvas corners are filled with white by default, but you can use the background option to choose a different color. To undo an existing frame instead, use our Remove a Border from a Bitmap tool. Bmp-abulous!

What Is a Bitmap Border Maker?

This free online browser-based program draws a customizable border on a BMP image. The border can sit outside the bitmap, run through its edge, or cover pixels just inside it. An outside border leaves the original picture untouched and expands the canvas by the amount entered for each side. A centered border divides every side width between the existing bitmap and the added canvas. An inside border paints over edge pixels and keeps the BMP at its original dimensions. The left, right, top, and bottom widths are controlled independently, so the frame can be even, asymmetrical, or limited to just one or two edges. Enter zero for any side that should remain borderless. The border color accepts a color name, hex code, RGB value, or a selection from the attached palette. You can also round each of the four border corners separately by entering an individual radius for the top-left, top-right, bottom-left, and bottom-right corners. When the border corners are rounded, the exposed canvas corners are filled with white by default, but you can use the background option to choose a different color. To undo an existing frame instead, use our Remove a Border from a Bitmap tool. Bmp-abulous!


Bitmap Border Maker Examples

Click to try!
click me

Add a Retro TV-style Border

In this example, we add a thick, rounded border that resembles the frame of an old television. The alpine cow appears to be looking at us through the curved TV screen, turning an ordinary animal photo into a playful retro scene. The semi-transparent border is 20 pixels wide and uses center mode. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Put one half of the border inside and the other half outside.
Border pixels on the left.
Border pixels on the right.
Border pixels at the top.
Border pixels at the bottom.
Set the color for the bitmap border.
Set a separate radius for each border corner.
Top-left radius.
Top-right radius.
Bottom-left radius.
Bottom-right radius.
Set the color outside the rounded border corners.
click me

Add Padding for an Art Frame

This example adds padding inside the bitmap and preserves its original dimensions. The pale frame makes a slightly funny photograph of a cat wearing a cabbage leaf look like a unique framed work of art. The square padding is 36 pixels wide. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Draw the border over the edge pixels without resizing the BMP.
Border pixels on the left.
Border pixels on the right.
Border pixels at the top.
Border pixels at the bottom.
Set the color for the bitmap border.
Set a separate radius for each border corner.
Set the color outside the rounded border corners.
click me

Add Margin with a Decorative Shape

In this example, we add a decorative margin with an unusual shape, uneven side widths, and asymmetrical corner rounding. The corner fill matches the background of the cactus photo, making the margin blend into the scene and form a distinctive ornamental edge. Its widths vary between 10 and 20 pixels, with alternating corner radii. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Draw the border beyond the BMP edge and enlarge the canvas.
Border pixels on the left.
Border pixels on the right.
Border pixels at the top.
Border pixels at the bottom.
Set the color for the bitmap border.
Set a separate radius for each border corner.
Top-left radius.
Top-right radius.
Bottom-left radius.
Bottom-right radius.
Set the color outside the rounded border corners.
click me

Add Empty Space for a Location Caption

This example adds an empty area (40 pixels) below a mountain BMP photograph without changing its other edges. The new space can later be used to identify the photo location or write the name of the snow-covered mountain. (Source: Pexels.)

Required options
These options will be used automatically if you select this example.
Draw the border beyond the BMP edge and enlarge the canvas.
Border pixels on the left.
Border pixels on the right.
Border pixels at the top.
Border pixels at the bottom.
Set the color for the bitmap border.
Set a separate radius for each border corner.
Set the color outside the rounded border corners.

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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