Portable Graymap .pgm
A Netpbm image format storing grayscale samples. It is useful for exchanging monochrome intensity data between image-processing programs.
Color input becomes grayscale. Tested output is binary P5.
PGM file format guidePGM to PBM converter
Convert Portable Graymap (.pgm) to PBM for free. Choose files, review the available settings and download your results. No account needed.
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Portable Bitmap .pbm
A Netpbm image format for black-and-white bitmaps. Each pixel represents one of two values rather than a color or a shade of gray.
Color and gray levels are reduced to black and white. Tested output is binary P4.
PBM file format guideHow to convert PGM to PBM
- Select PGM files from your device or drag them into the converter.
- Check the PBM output. Open conversion settings if you want to make adjustments.
- Convert, compare the original and result, then download your files.
Quality, compatibility and file limits
Choose dimensions and image quality before converting. Still-image exports keep one frame. Unedited GIF, WebP, AVIF, JPEG XL and MNG conversions can retain animation. Animated edits use a GIF intermediate with a limited color palette. Canvas editing uses browser display precision and does not preserve original EXIF, HDR, or scientific image data.
Processing uses your device when possible and our servers when required. Browser files are limited to 256 MB each; server conversions to 64 MB; browser spreadsheets to 32 MB. Previews show supported content and do not guarantee identical rendering in every application.