How do I convert BMP to PNG?

Add your BMP file to the upload area above, then press Convert. The PNG file downloads straight to your device. You do not need an account, and there is no watermark.

Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can even disconnect from the internet after the page loads and it will still work.

Does converting to PNG reduce quality?

No. PNG is a lossless format, so the conversion preserves exactly what is in your BMP file. Note that it cannot recover detail that was already discarded when the BMP was first created — a lossless container does not undo earlier compression.

How large a file can I convert?

Up to 120 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large videos may run out of memory on a phone — those are better converted on a laptop.

ImageLosslessRuns in your browser

BMP to PNG Converter

Turn BMP files into PNG in a couple of clicks. Uncompressed raster bitmap. Large but simple. Lossless image format with full alpha transparency. The conversion is lossless — every pixel, sample or byte in the source is preserved.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

BMP files (.bmp, .dib) · up to 120 MB each

or paste files from your clipboard

Ready when you are

Drop a BMP file above and FileTools360 will turn it into PNG — right here on your device, without uploading anything.

⌘K to search converters

How to use it

1
Add your BMP files
Drag them onto the upload area, choose them from your device, or paste them from your clipboard. You can queue several at once.
2
Adjust the settings if you want to
The defaults suit most people. Open Advanced to control dimensions, rotation and metadata removal.
3
Convert and download
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

BMP and PNG explained

BMP stores pixels essentially raw, with little or no compression. A 1920×1080 BMP is around 6 MB regardless of what the picture contains, because every pixel takes the same space whether it is part of a gradient or a flat colour.

PNG is a lossless raster format built to replace GIF. It stores every pixel exactly as given and supports a full 8-bit alpha channel, which means genuine partial transparency rather than the single transparent colour GIF offers.

Where BMP files come from: Legacy Windows software, some scientific and industrial imaging tools.
Where PNG is used: Screenshots, exported logos and UI assets, and anything designed rather than photographed.

BMP vs PNG

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

BMP compared with PNG
Property	Source	Target
Compression	Uncompressed	Lossless
Transparency	No	Yes
Animation	No	No
Introduced	1990	1996
Browser support	Broad, though rarely the best choice today.	Universally supported.

BMP is stronger at: Trivially simple to read and write. No compression artefacts whatsoever. Still readable by very old software.
PNG is stronger at: Completely lossless — re-saving never degrades the image. Full alpha transparency, including soft edges and shadows. Sharp text and hard edges stay sharp.

Why convert BMP to PNG?

People make this switch when they run into the limits of BMP: almost always — PNG gives you the same lossless fidelity in a fraction of the space. PNG is the better fit when the image has transparency, text, screenshots, logos, or you need an exact pixel-for-pixel copy.

There is also a size argument: BMP stores data with little or no compression, so the PNG version is normally dramatically smaller for the same content.

BMP limitations that prompt the switch: Enormous files. No standard support for transparency in most variants. Effectively unusable on the web.
What you give up: Much larger than JPEG or WebP for photographic content. No animation in practice (APNG exists but support is inconsistent).

Does converting BMP to PNG reduce quality?

Both formats store the content without discarding data, so this conversion preserves it exactly. The file size may change because the two formats compress differently, but the content itself is unaffected.

Converting a JPEG to PNG does not improve its quality. It freezes the image exactly as it already is, artefacts included, in a larger file.