BMP to PNG Converter

Create compact, lossless PNG files from supported Windows bitmaps.

Drop BMP files here

Hover here and press Ctrl+V to paste

Up to 50 MB each · 50 files per batch

Files stay on your deviceLocal browser processing

No signup or watermarkDownload clean results

Controlled batch conversionUp to 30 at once · 3 at 50 MB

Replace bulky, uncompressed bitmap files with compact PNG files that retain sharp interface graphics and work naturally on websites.

Why PNG is usually smaller than BMP

PNG uses lossless compression instead of storing every bitmap row nearly raw. Screenshots, icons, diagrams, and other flat-color BMP images often shrink substantially while keeping the same decoded pixels and dimensions.

How to convert BMP to PNG

Select supported 24-bit or 32-bit BMP files.
Review the detected pixel dimensions before processing.
Export lossless PNG results without sending the bitmaps to a server.

When this converter is useful

Publish old Windows screenshots on the web.
Reduce storage used by flat-color BMP interface assets.

Supported files and limitations

Uncompressed 24-bit and 32-bit BMP only
Maximum input size is 50 MB; decoded-memory limits also apply

BMP to PNG questions

Does BMP to PNG reduce image quality?

PNG encoding is lossless, so supported BMP pixels are preserved while the file will usually become much smaller.

Do these files leave my device?

No. Supported files are inspected and converted in this browser tab. Up to 50 files can be queued; up to 30 smaller files or three 50 MB files can be processed at once.