What is a BMP file?
A .BMP file is a Bitmap Image file developed by Microsoft. It stores digital images as a grid of colored pixels. The format is mostly uncompressed. This means it creates high-quality images, but the file sizes are large compared to compressed formats like .JPG or .PNG.
How to open BMP files?
Most operating systems can open .BMP files natively. On Windows, you can use Microsoft Paint or Microsoft Photos. On macOS, Apple Preview opens them. However, a .BMP file might contain a different internal format. Some files are actually misnamed .JPEG or .PNG files, or specific UI elements for navigation software. If your image viewer fails to open the file, viewer.online/bmp analyzes .BMP files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Software and tools
You can view and edit .BMP files with major image editors like Adobe Photoshop, GIMP, and CorelDRAW. If you work on a command line, tools like ImageMagick can inspect and process these files. If you need a smaller file size for web use or email, we recommend converting your file. You can easily change your image to a smaller format like .JPG or .PNG on convert.guru.
Best practices and troubleshooting
Because .BMP files are large, they are not ideal for websites. They make web pages load slowly. If your file does not open, the file extension might be wrong. The file might contain compressed .PNG or .JPG data instead of standard uncompressed bitmap data. Use an analysis tool to check the true file type.
Summary
viewer.online/bmp directly opens and previews .BMP files in the browser, eliminating the need to install software or troubleshoot compatibility issues.