What BMP to PNG conversion does

Convert BMP (bitmap) images into PNG for everyday use, editing, and sharing — without installing desktop software.

How to convert BMP to PNG

1. Choose a .bmp file.
2. Select Convert & download.
3. Save the .png file from your browser downloads.

Dimensions and lossless output

The output PNG keeps the same pixel dimensions as the source BMP. PNG encoding here is lossless, so there is no quality slider.

Transparency

Most BMP files have no transparency at all. Transparency is kept in the PNG output only when the browser decodes an alpha channel from the source BMP — this tool does not claim to preserve transparency that the source file or your browser's decoder does not actually provide.

Privacy and local processing

• Processing occurs locally in the browser.
• Files are not uploaded to Looty Tools for conversion.
• Converted images remain on your device.

Limits and known issues

• Inputs: BMP (.bmp) only, up to 25.0 MB and 8,192 px per side.
• Decoding uses your browser's built-in image support. Unusual or corrupted BMP variants may fail to decode.
• Metadata is not preserved in the downloaded PNG.

Related tools

• JPG to PNGConvert JPG images to PNG when you need lossless quality.
• HEIC to PNGConvert HEIC photos to PNG for editing and transparency workflows.
• BMP to JPGConvert BMP images to JPG to reduce file size.
• Image ConverterConvert HEIC, HEIF, JPEG, PNG, WebP, and other supported image formats to JPEG or PNG directly in your browser.
• Images to PDFConvert JPG, PNG, WebP, and HEIC images into a single PDF.

BMP to PNG FAQ

Are my files uploaded?

No. Conversion runs locally in your browser using native browser image decoding. Your file is not uploaded to Looty Tools servers for this workflow.

Is the conversion lossless?

Yes. PNG uses lossless compression, so no image detail is discarded during conversion.

Does BMP to PNG preserve transparency?

Transparency is kept only when the browser decodes an alpha channel from the source BMP. Most BMP files have no transparency at all, so the output is typically fully opaque.

What BMP files are accepted?

Files with a .bmp extension and a valid BMP header ("BM" signature) are accepted. Renamed or corrupted files are rejected before decoding.

Are image dimensions preserved?

Yes. The output PNG keeps the same pixel dimensions as the source BMP.

Why did conversion fail?

Unusual or corrupted BMP variants may not decode in every browser. Try re-exporting the file, or use a current version of Chrome, Edge, Firefox, or Safari.