DIB to BMP Converter

What happens when you convert DIB to BMP

• DIB and BMP are the same format with different extensions, so nothing is re-encoded. The file is copied byte for byte and saved with a .bmp extension.
• Because the bytes are identical, the BMP has exactly the same quality, dimensions and size as the DIB.

How to convert DIB to BMP online

1. Press "Choose DIB files" and select one or more files, or drag them onto the box. You can add files of any size your device can hold in memory.
2. Adjust the settings if you need to. The output is lossless, so there is no quality setting to worry about.
3. Press "Convert to BMP". Images convert in a second or two each.
4. Save each BMP with its download button. Close the tab and every trace of the files is gone from memory.

Why convert DIB to BMP?

DIB files usually come from Windows programs, the clipboard and some older graphics software. People convert them to BMP because BMP is read by almost every Windows program, embedded display and old piece of software.

In short, DIB is good at what it was made for, and BMP is the more practical choice when the file has to open, upload or print somewhere else. Windows Photos and Paint open DIB; browsers show it once it is renamed .bmp, while BMP opens in browsers and every Windows image tool.

How to convert DIB to BMP on Windows, Mac, iPhone and Android

On Windows

Open this page in Chrome, Edge or Firefox, drag your DIB files in from File Explorer, and press Convert. Each BMP is saved to your Downloads folder. Paint can also re-save an image as BMP with Save as, provided Windows can open the DIB in the first place.

On a Mac

Safari, Chrome and Firefox all work. Drag the DIB files from Finder onto the drop zone and the BMP files land in Downloads.

On iPhone and iPad

Open the page in Safari and tap Choose DIB files. You can pick from Photos or from the Files app. The converted BMP appears in Files, in the Downloads folder; to put it in your photo library, open it there, tap Share and choose Save Image.

On Android

Open the page in Chrome, tap Choose DIB files and pick them from Files or your gallery. The BMP is saved to the Download folder, where any file manager can find it.

DIB vs BMP: the differences

About DIB and BMP files

What is a DIB file?

DIB stands for device-independent bitmap, the pixel layout inside every BMP, and Windows uses it for pictures on the clipboard. A .dib file is almost always an ordinary BMP with a different extension, which is why renaming it to .bmp usually works.

What is a BMP file?

BMP usually stores pixels with no compression at all, so a 12 megapixel photo is about 36 MB. That size is the price of being readable by almost any program ever written for Windows.

DIB to BMP not working? Common problems

• Colours look slightly different. Browsers convert images to the standard sRGB colour space when they decode them, so wide-gamut and CMYK images can shift a little.
• A phone photo comes out upright even though it looked sideways elsewhere. That is correct: the rotation stored in the photo is applied during conversion, so the BMP is always the right way up.
• The file is bigger than expected. It is not: the BMP is the same size as the DIB, byte for byte.

Convert DIB to BMP from the command line

If you work in a terminal, ImageMagick converts DIB to BMP in one line:

magick input.dib output.bmp

To convert every DIB in a folder at once, use magick mogrify -format bmp *.dib. The converter on this page does the same job without installing anything.