PNG to BMP converter
This makes a BMP out of the PNG you already have. BMP stores a picture as plain rows of pixels with nothing squeezed out, which makes it easy for old Windows software and simple devices to read. Your file never leaves your computer.
Need the other direction? Convert BMP to PNG
How to convert PNG to BMP
- 1 Drop your PNG .png file onto the page, or click to browse for it.
- 2 Check the options. Nothing is thrown away on the way to BMP, so there is no quality dial to set.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the BMP, or add more files and do the whole set in one go.
Why convert PNG to BMP
- Nothing is squeezed, so there is nothing to go wrong and nothing to unpack.
- Simple enough that almost any program can read it.
- Embedded devices and firmware that cannot afford a decoder.
- PNG: photos come out far larger than they would as JPG or WebP.
PNG compared with BMP
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | PNG | BMP |
|---|---|---|
| File extension | .png | .bmp |
| Compression | Lossless | Uncompressed |
| Colour depth | Up to 16 bits per channel, 48-bit colour | 1, 4, 8, 16, 24 or 32 bits per pixel |
| Typical file size | Larger | Largest |
| Browser support | Every browser | All current browsers |
| Introduced | 1996 | 1986 |
| Developed by | PNG Development Group / W3C | Microsoft |
| Standard | Open | Proprietary |
Quality and what changes
Both sides are lossless, so every pixel survives the trip intact and converting back returns the same image. What changes is the size and what the file can carry: BMP stores the data without compression, so expect a much larger file.
- One BMP limitation to keep in mind: barely any support for colour management or file details.
Questions about PNG to BMP
Is my PNG file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your PNG is read straight from your own disk, converted on your machine and handed back as a BMP. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several PNG files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate BMP downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.