Convert PNG to BMP
Both PNG and BMP store pixels losslessly, so this is the rare conversion where nothing about the image is degraded. What changes is the packaging, and the price is size: PNG compresses, BMP essentially does not. A 24 bit BMP always costs three bytes per pixel plus a 54 byte header, so a 1920 x 1080 image lands at 6,220,854 bytes every single time, whether it is a screenshot of a blank document or a dense photograph. The same picture as a PNG might be 80 KB or 2 MB depending on what is in it.
Drop your PNG files below and download BMP in seconds. Free, unlimited and completely private: the conversion runs inside your browser, so your files never leave your device and are never uploaded to a server.
No upload. Works with your network switched off. Check it yourself, or read what actually happens to your file.
Why convert PNG to BMP?
You would only accept that trade when something on the other end demands it. BMP turns up in legacy Windows software, in embedded and industrial equipment that drives a display or a label printer, in scientific and lab tooling, and in programming exercises where the whole point is to read pixel bytes without a decoding library. If the destination will take PNG, keep the PNG. If it will only take BMP, this is the conversion.
PNG stores every pixel exactly as it was saved, which makes it the safe choice whenever detail matters more than file size. It supports a full alpha channel, so logos and UI elements keep clean, soft edges on any background. The tradeoff is that photos saved as PNG can get large.
BMP stores pixels with little or no compression, which makes files huge but trivially simple to read. It is mostly seen in legacy Windows workflows, screenshots from older tools and some scientific software. Converting to a compressed format usually shrinks a BMP by 90 percent or more.
Note that BMP does not support transparency, so any transparent areas in your PNG files will be filled with a solid background after conversion.
What this converter does to your PNG file
The PNG is decoded and rewritten as an uncompressed 24 bit BMP with bottom-up row order and a 2835 pixels-per-metre (72 DPI) resolution field, which is the plain BITMAPINFOHEADER variant legacy Windows tooling reads without complaint. Every colour value survives the trip exactly, because neither format compresses lossily. The one thing that does not survive is transparency: 24 bit BMP has no alpha channel, so a PNG with a cut-out background is flattened onto white before encoding, and soft anti-aliased edges are baked against that white.
PNG vs BMP at a glance
| PNG | BMP | |
|---|---|---|
| Full name | Portable Network Graphics | Bitmap image |
| Compression | Lossless | Uncompressed |
| Transparency | Yes | No |
| Best for | Logos, screenshots and graphics with transparency | Legacy Windows software and raw pixel data |
What changes when you convert PNG to BMP
| What happens | |
|---|---|
| Image quality | Identical. Both formats are lossless, so every pixel colour survives the trip exactly. |
| Transparency | Lost. BMP cannot store an alpha channel, so transparent areas are filled with solid white. |
| EXIF and GPS | Removed. The conversion goes through a pixel buffer, so camera data and location are not carried into the BMP file. |
| Colour profile | Not carried across. The image is handled in sRGB, which is right for the web and wrong for colour-managed print work. |
| Animation | Not applicable. PNG files here are single images. |
| File size | Much larger. A 24 bit BMP costs three bytes per pixel regardless of content, so the file size is fixed by the dimensions alone. |
How to convert PNG to BMP
- Drop one or more PNG files into the box above, or click to browse.
- ImageConvert converts each file to BMP right on your device.
- Download a single file, or grab everything at once as a zip.
Frequently asked questions
Does converting PNG to BMP lose any quality?
No. PNG is lossless and the BMP written here is uncompressed, so every pixel colour comes through unchanged. The only loss is the alpha channel, which a 24 bit BMP cannot store.
Why is the BMP so much bigger than the PNG?
Because BMP stores raw pixels. A 24 bit BMP is fixed at three bytes per pixel regardless of content, while PNG applies filtering and DEFLATE compression that can shrink a flat graphic by 95 percent. Growing from kilobytes to megabytes is normal and is not a fault in the conversion.
What happened to my transparent background?
It was filled with white. The BMP written here is 24 bit and has no alpha channel, so transparency cannot be represented and is flattened onto a solid white background during conversion.
What is a PNG file?
PNG is a lossless format with transparency support, ideal for graphics, logos and screenshots.
What is a BMP file?
BMP is an uncompressed Windows bitmap that keeps full pixel detail at a large file size.
Is it free to convert PNG to BMP?
Yes. There are no limits, no watermarks and no account needed. Convert as many PNG files as you like.
Are my files private?
Completely. Your PNG files never leave your browser and are never uploaded to a server, so your images stay on your device.