BMP to PNG Converter In your browser, nothing uploaded
EXIF metadata is removed. Decoding and redrawing the image carries no GPS coordinates, camera model or timestamp across, so the file you download has none of it. If you need that data kept, copy the originals instead.
Drag & drop images here
or click to browse — HEIC, AVIF, WebP, PNG, JPG, GIF, BMP, TIFF
How to Convert BMP to PNG
- Drag and drop your BMP files into the converter above, or click to browse.
- The converter automatically outputs PNG format. Adjust quality if needed.
- Click download to save your converted PNG files. For multiple files, use "Download All as ZIP."
What is PNG?
PNG is a lossless raster format standardised in 1996. Nothing left in circulation fails to support it. Its compression pairs DEFLATE with per-row prediction filters that exploit a simple fact about real images: neighbouring pixels tend to look like each other, and a filter that predicts one from its neighbour leaves very little for DEFLATE to store. Nothing is discarded. A PNG reproduces its source pixel for pixel. It carries a full 8-bit alpha channel, handles everything from 1-bit line art to 16 bits per channel of colour, and is the default choice for screenshots, diagrams, logos and any image with text in it.
What is a BMP File?
BMP (Bitmap) is an uncompressed image format developed by Microsoft. BMP files are very large because they store every pixel without compression. Converting BMP to modern formats dramatically reduces file size while preserving quality.
BMP vs PNG
This is the conversion where you genuinely give up nothing. BMP writes pixels out raw. Its size tracks the image's dimensions and ignores the content entirely. PNG compresses those same pixels losslessly and rebuilds the original image exactly on decode. Same image, much smaller file. Commonly 50 to 90 percent smaller, and far more than that for screenshots and flat graphics — the row filters have long runs of similar pixels to work on. There is no quality trade-off to weigh here, which is the difference from converting to JPG. PNG also keeps an alpha channel, if the bitmap happened to carry one, which JPG cannot.
Why Convert BMP to PNG?
- 50 to 90 percent off, typically.
- 90 percent and more is ordinary for a screenshot, where flat colour regions compress beautifully under PNG and go to pieces under JPG, which spatters ringing along the edge of every letter.
- Zero pixels change, so you can open the file, edit it and save it again as many times as the job takes without ever accumulating generation loss.
- 32-bit BMP alpha survives into the PNG file, where JPG would flatten it to black.
- Not one significant website serves BMP, while PNG is a first-class web format more or less everywhere.
Frequently Asked Questions
Does this conversion lose any quality?
None at all. PNG compression is mathematically lossless. The decoded PNG is pixel for pixel identical to the source bitmap. BMP to JPG is the other story, and it gets small by discarding detail permanently. When exactness matters, PNG is the correct destination, and that covers scanned documents, screenshots, technical drawings and anything you intend to edit further.
How much smaller will the PNG be?
It varies with the content rather than the dimensions, which is exactly the point. Screenshots, UI captures, diagrams and flat graphics will often shrink by 90 percent or more. Detailed photographs shrink less, perhaps 30 to 60 percent, because there is more genuine variation in them to encode and less for the prediction filters to guess right. Either way the PNG comes out much smaller and identical in content.
Should I convert to PNG or JPG?
PNG if the image has text, sharp edges, flat colour areas or transparency in it. Screenshots, scans, logos, charts. JPG if it is a photograph and you want the smallest file going. For photographs JPG beats PNG substantially on size. For anything graphical PNG usually wins on both size and appearance, because JPG's compression leaves visible ringing around the hard edges those pictures are made of.
Why is BMP so much larger in the first place?
Because it stores pixels essentially uncompressed. The format dates from the late 1980s, when writing bytes straight into video memory mattered more than saving disk space, and it makes no attempt to exploit the similarity between neighbouring pixels that every modern codec is built on. A plain white 4000x3000 BMP therefore takes roughly the same space as a detailed photograph of the same dimensions — as a PNG the blank one would be a few kilobytes.