Convert PNG to BMP online

To convert PNG to BMP, upload the PNG file, start the conversion and download the result: Converter.now writes an uncompressed 24-bit BMP. BMP has no transparency, so transparent areas are filled with white.

◈ Encrypted transfer◷ Short retention⊘ No watermark◎ Works on every device

PNG to BMP at a glance

Converts: Portable Network Graphics → BMP raster image
Output: An uncompressed 24-bit BMP
Compression: PNG: lossless → BMP: uncompressed
Engine: Pillow (with ImageMagick fallback)
Privacy: Private download link; files are deleted after 6 hours. No account needed.

Transparency flattening and image encoding: How PNG becomes BMP

The PNG pixel canvas is decoded, its alpha composited against an opaque background, and the result encoded as BMP. Edge color must be judged against the actual destination background because transparency cannot be recovered afterward. PNG decoding combines filtered scanlines with declared color type, bit depth, palette or full alpha, color-profile chunks, and optional ancillary metadata. The BMP writer commits one rectangular pixel surface with explicit row order and color depth; it is aimed at simple bitmap interchange, not layered or multi-resolution artwork.

Decoded canvas - Losslessly encoded pixels with full alpha transparency. Written image - A plainly structured bitmap with minimal compression that most software can read.

Not quite the pair you need? Browse more ways to convert PNG files or the BMP converter hub for every route into and out of BMP.

If you want the reasoning behind this PNG to BMP route, why the file you keep differs from the file you send explains which copy to preserve and which to share.

PNG

Portable Network Graphics

Used for lossless images and transparency.

Family: Images
MIME: image/png

→

BMP

BMP raster image

Designed for pixel-based artwork, scans, and photographs.

Family: Images
MIME: image/bmp

When to actually choose PNG to BMP

Choose BMP when its particular balance of compatibility, alpha, animation, and file size matches the destination better than PNG.

What changes between the PNG model and the BMP deliverable

BMP has no transparency, so transparent areas are filled with white.
Metadata handling differs between PNG and BMP; do not assume every application-specific field carries across untouched.

What the PNG source carries and the BMP output demands

What can fail when Portable Network Graphics is interpreted

PNG is inefficient for many photographs, and indexed optimization can reduce a smooth palette even without JPEG-style loss.

What BMP raster image cannot safely promise

A BMP derivative is typically far larger than a web-oriented image, and row order or alpha handling can differ between the apps that read it.

How the BMP writer handles this route

a plainly structured bitmap with minimal compression that most software can read is what gets written, labeled as image/bmp. Whether that actually opens depends on the receiving application, not on the file extension.

How to confirm the converted BMP actually works

Record the PNG evidence before conversion

Inspect transparent edges, gradients, exact dimensions, color, and small text at 100%.

Test the BMP file in its receiving workflow

Check the dimensions, color depth, and orientation, and confirm whether the app you're using actually reads BMP transparency.