Can I convert BMP to PPM / PNM on iPhone, Android, Mac or Windows?

Yes. ConvertPixels works in Safari, Chrome, Edge and Firefox on any device, so you can convert BMP to PPM / PNM on your phone or computer without installing an app.

Is there a free BMP to PPM converter with no sign-up?

Yes, this one. Converting BMP to PPM on ConvertPixels is free, with no sign-up, no watermark and no daily cap. Convert up to 30 files per batch, each up to 50 MB.

Can I convert BMP to PPM without losing quality?

Yes. PPM is a lossless format, so your converted file is pixel-for-pixel the same as the BMP. (It can't add back detail the original never had.)

Can I batch convert BMP to PPM?

Yes. Add up to 30 BMP files and convert them in one batch. You can even choose a different output format for individual files, then download them separately or together as a ZIP.

Is it safe to upload BMP files to ConvertPixels?

Yes. Uploads use an encrypted connection and are processed automatically - nobody views them. Your originals are deleted straight after conversion and the results within an hour, or instantly if you click "Delete from server now".

Convert

BMP to PPM / PNM Converter

Convert BMP images to PPM / PNM online in seconds - free, with no sign-up and no watermark. Batch convert up to 30 files and download them together as a ZIP.

Free
No sign-up
No watermark
Private by design

Choose filesor drag and drop files hereUp to 30 files · 50 MB each

Image Converter

How to use it

1
Drop your BMP files onto the converter
2
Press Convert to turn them into PPM / PNM
3
Download your PPM / PNM images one by one or as a ZIP

BMP to PPM / PNM

Why convert BMP to PPM?

BMP and PPM are both lossless formats. PPM is the usual choice for simple uncompressed images for scientific and developer tools.

Where PPM works best

PPM is ideal for simple uncompressed images for scientific and developer tools. Converting gives you a file that works in the apps and websites that ask for PPM.

BMP vs PPM / PNM: what's the difference?

Property	BMP	PPM / PNM
Compression type	Lossless (exact pixels, larger files)	Lossless (exact pixels, larger files)
Transparent background	No	No
Animation	No	No
Where it opens	Most browsers, rarely used on the web	None
Used for	Legacy Windows software (files are very large)	Simple uncompressed images for scientific and developer tools

What is a BMP file?

BMP (bitmap) is Microsoft's original Windows image format. It stores pixels with little or no compression, so it's simple and lossless but very large - a 12-megapixel photo can top 35 MB.

BMP is mainly found in older Windows software, some industrial and embedded systems, and scanner output. For almost every other use, PNG gives the same quality at a fraction of the size.

How to open a BMP file

Windows Photos and Paint open BMP files, as does Mac Preview. Most browsers can display them too. Convert to PNG for a lossless copy that's much smaller, or JPG for photos.

Extensions: .bmp, .dib
Compression: None (usually)
Transparency: Rarely supported
Best for: Legacy Windows software

What is a PPM / PNM file?

PPM, PGM, PBM and PNM are the Netpbm formats: deliberately simple, uncompressed image files from the 1980s. They store pixels as plain numbers, which makes them easy for programs to read and write.

You'll mostly meet them in scientific computing, image-processing scripts and developer tools - rarely in everyday use.

How to open a PPM / PNM file

GIMP, IrfanView, XnView and Photoshop open Netpbm files, as do Linux image viewers. Windows Photos and browsers can't, so convert to PNG for a lossless, much smaller copy.

Extensions: .ppm, .pgm, .pbm, .pnm
Compression: None
Best for: Scientific and developer tools
Family: Netpbm