BMP to PNG Converter

Convert uncompressed Windows Bitmap (BMP) images into compressed PNG files.

How to Use

Upload BMP

Select a .bmp file.

Compress

Re-encode Bitmap array to PNG DEFLATE container.

Download PNG

Save compressed PNG file.

Convert Uncompressed Windows Bitmap (BMP) to PNG

Windows Bitmap (.BMP) files store raw, uncompressed pixel arrays, producing multi-megabyte files for basic graphics. Converting BMP images to PNG applies DEFLATE compression, shrinking file sizes by 70% to 90% while keeping 100% lossless visual quality.

Convert legacy BMP files to PNG locally in your web browser tab without server uploads.

Real-World Examples & Use Cases

Legacy Windows Graphic Optimization

Compress large BMP screenshots and MS Paint graphics into web-friendly PNG files.

Industrial & Medical Imaging Workflows

Convert raw BMP scanner and microscope outputs into lossless PNGs for compact storage.

Email Attachment Size Reduction

Shrink multi-megabyte BMP files into lightweight PNG attachments.

Private Document Privacy

Convert sensitive BMP scans with local browser processing.

How It Works

BMP Pixel Array -> Canvas -> PNG DEFLATE Compression

Frequently Asked Questions

Why are BMP files so large compared to PNG files?▼

BMP files store raw uncompressed pixels without compression, whereas PNG applies lossless DEFLATE compression.

Is converting BMP to PNG lossless?▼

Yes! 100% of original pixel color values are preserved exactly.

Are my BMP files uploaded to a server?▼

No. Conversion runs 100% locally inside your web browser.

How much space will I save by converting BMP to PNG?▼

Converting BMP to PNG typically reduces file size by 70% to 90%.

Can I view PNG files on any device?▼

Yes! PNG is supported natively across 100% of computers and mobile devices.

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