Convert BMP to PGM

Tested on Windows 11, 24 October 2026

Convert BMP images to PGM on your Windows PC. Filoshi converts with ImageMagick and lets you resize, crop or remove location and camera data first. Convert one file or hundreds at once; nothing is uploaded.

Get Filoshi · $29One-time purchase, for Windows 10 and 11.

BMP to PGM with the Filoshi app

This conversion uses ImageMagick, which is built into the app. It runs on your Windows PC, offline, and the file never leaves it.

  1. Drop your BMP files on the Filoshi window, or paste them with Ctrl+V.
  2. Pick PGM for one file or for all of them.
  3. Press Convert all. Each PGM file appears next to its original, which is never changed.
Get Filoshi · $29

For Windows 10 and 11 · no subscription

Source format

What is BMP?

Bitmap Image (.bmp). BMP is Microsoft's bitmap format, normally uncompressed: every pixel is stored as it is, so files are large. Almost every Windows program reads it, but it is rarely used for sharing today.

Common use: Older Windows programs, simple uncompressed images

Output format

What is PGM?

Portable Graymap (.pgm). PGM is the greyscale member of the Netpbm family: simple and uncompressed, easy for programs to read and write. It shows up in computer vision, scientific imaging and command-line image tools.

Common use: Computer vision and scientific images

Questions about BMP to PGM

Is converting BMP to PGM free?
BMP to PGM needs the Filoshi desktop app for Windows, a one-time purchase of $29. There is no subscription and no per-file fee.
Does converting BMP to PGM lose quality?
No. Both BMP and PGM store images without loss, so the converted file holds exactly the same pixels; it may be larger, because PGM is uncompressed.
Is my BMP file uploaded anywhere?
No. Filoshi converts on your PC with its built-in engines (FFmpeg, ImageMagick, Pandoc, PDFium, pdfcpu and 7-Zip). Your BMP file never leaves your computer.
Has BMP to PGM been tested?
Yes. BMP to PGM is one of the 1,841 conversions that passed Filoshi's automated test matrix on Windows 11.
Can I convert many BMP files at once?
Yes, in the desktop app. Drop as many BMP files as you like on the window, pick PGM once for all of them, and each file shows its own progress. The new files appear next to the originals, which are never changed.

Related conversions

Other BMP conversions

BMP to JPGBMP to JPEGBMP to PNGBMP to WEBPBMP to AVIFBMP to GIFBMP to TIFFBMP to TIF

Convert to PGM

PNG to PGMJPG to PGMJPEG to PGMWEBP to PGMAVIF to PGMJXL to PGMGIF to PGMTIFF to PGM