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BMP to PNG converter

This BMP to PNG converter shrinks large BMP files into PNG images with the same pixels, so they are easier to store, send and use on the web.

Width × height (px)

How to convert BMP to PNG

  1. Choose or drop one or more BMP files above.
  2. Conversion starts right away. Resize first if you need different dimensions.
  3. Download each PNG, or save them all as a ZIP.

Why convert BMP to PNG?

BMP stores every pixel without any compression, so files are huge. PNG compresses the picture without losing anything. You get exactly the same image in a much smaller file, which opens in far more places, including browsers and document tools.

How much smaller will it be?

Simple graphics, screenshots and icons often shrink by 90 percent or more. Photos shrink less, because they contain more detail, but the PNG is still usually a fraction of the BMP. Nothing is lost, so this is a safe way to cut size.

PNG or JPG?

  • PNG keeps every pixel and supports transparency. It suits screenshots, graphics and anything you will edit.
  • JPG is smaller for photos but loses a little detail.

Related tools

Want the smallest file for a photo? Use BMP to JPG. To go the other way, see PNG to BMP. The PNG converter handles many formats in one place.

Privacy, speed and file names

Every BMP file is opened and saved as PNG inside your browser, so nothing is uploaded and conversion starts right away. Speed depends on your device, not your connection. Results are named after the original with “-tech9pros” added, so your originals are never overwritten. The picture stays exactly the same, only the file gets smaller.

Converting many files

Select up to 30 files at once and download them one by one or as a single ZIP. If you change a setting, the files are converted again with the new value, so you can try a different quality without adding them again.

If something goes wrong

If a file will not open, it may use an unusual BMP variant. Open it in Paint, save it again as BMP, and retry.

Frequently asked questions

Does converting BMP to PNG lose quality?

No. PNG is lossless, so the picture is identical. Only the file size changes.

Why is my BMP so large?

BMP stores every pixel at full size with no compression, so the file grows with the pixel count.

Does it keep transparency?

Standard BMP files from most programs have no transparency. If yours does, the PNG keeps it.