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How to Convert PNG to BMP - Step by Step Guide

Step 1

Upload Your PNG Image

Start by uploading your PNG (Portable Network Graphics) image:

Click to upload: Click the upload area or "Upload" button to select your PNG file
Drag and drop: Drag your PNG image directly into the upload area
Try the sample: Click "Sample" to see demo conversion
Privacy guaranteed: Processing happens in your browser - files never uploaded
Step 2

Preview Your Image

Once uploaded, you'll see a preview of your PNG image. The converter will display:

Image preview: Visual preview of your PNG image
File information: Original file name and size
Image dimensions: Width and height in pixels
Transparency check: If your PNG has transparency, note that BMP doesn't support it
Step 3

Automatic Conversion

The conversion happens automatically and instantly after upload using the HTML5 Canvas API. No convert button needed!

Instant decompression: PNG converted to uncompressed BMP
Quality maintained: Pixel-perfect conversion
Transparency handling: Transparent areas become white background
Local processing: Everything happens on your device

Understanding BMP Format

BMP (Windows Bitmap) characteristics as explained by MDN Web Docs:

Uncompressed: Stores raw pixel data without compression
Large files: Typically 10-20× larger than PNG
Windows native: Native format for Windows Paint
No transparency: Cannot store alpha channel
Step 4

Download Your BMP

Once conversion is complete (automatic!), you have these options:

Download as BMP: Click "Download" to save your uncompressed image
Copy to clipboard: Click "Copy" for quick usage
Edit in Paint: Open directly in Windows Paint for modifications
Convert more: Use "Clear" button to process another PNG

⚠️ File Size Warning

BMP files will be much larger than PNG:

1920×1080 PNG:0.4 MB
Same as BMP:6.2 MB
File increase:1550% larger!

Only convert to BMP if you specifically need it for Windows applications or editing in Paint.

Frequently Asked Questions

Why would I convert PNG to BMP?

The main reasons are: editing in Windows Paint (BMP is its native format), compatibility with legacy Windows software, or needing uncompressed raw pixel data. For most modern uses, PNG is better. Learn more about PNG format specifications.

What happens to transparent PNG areas?

BMP doesn't support transparency, so any transparent areas in your PNG will be converted to a solid white background. If you need to preserve transparency, keep your image in PNG format or consider converting to formats that support transparency as detailed on Can I Use.

Will the BMP file be much larger?

Yes, dramatically! BMP files are typically 10-20 times larger than PNG because BMP stores uncompressed pixel data while PNG uses lossless compression. A 400 KB PNG might become a 6 MB BMP. Only convert if you specifically need BMP format.

Can I edit BMP in Windows Paint?

Yes! BMP is the native format for Windows Paint, making it perfect for quick edits. However, modern versions of Paint also support PNG, so you may not need to convert at all. After editing in Paint, you can use our BMP to PNG converter to compress it again.

Is any quality lost when converting PNG to BMP?

No, the conversion is lossless and pixel-perfect. Both PNG and BMP can store the same color data. The only difference is that PNG compresses the data while BMP doesn't. The visual quality remains identical according to W3C graphics standards.

Should I use BMP for websites?

No, never! BMP files are far too large for web use and will slow down your site dramatically. Always use PNG, WebP, or JPG for web images. BMP is only suitable for Windows desktop applications, Paint editing, or legacy software compatibility. Check browser support to see why BMP is unsuitable for modern web development.