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PNM PNG
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Convert PNM to PNG

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Verified by Adam B.· reviewed by FE Editorial ·updated Aug 4, 2026
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Is it possible to convert PNM to PNG?
Yes - PNM converts to PNG.

You can do it right here with our free converter - no sign-up, and your file is deleted right after.

Upload your .pnm file to the converter above and download the PNG instantly - it is free and your file is deleted after converting. No quality is lost because both PNM and PNG are lossless; the only change is that the PNG file will be significantly smaller thanks to compression.

Also to PNG: QOI · APM · PBM

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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PNM → PNG converterFREE
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Why convert PNM to PNG?

PNM (Portable Anymap) stores raw, uncompressed pixel data, making files very large and unreadable by most modern software. Converting to .PNG keeps every pixel intact while applying lossless compression, producing a file that is a fraction of the size and opens in any image viewer, browser, or editor. PNM is an umbrella format covering PBM (black-and-white), PGM (grayscale), and PPM (color), and all three convert cleanly to PNG.

How to convert PNM to PNG

Command line - ImageMagick CLI

Run magick input.pnm output.png to convert a single file.

GIMP FREE

Open your .pnm file in GIMP and use File > Export As to save it as .png - GIMP reads PBM, PGM, and PPM variants natively.

XnView / XnView MP FREE

Open the .pnm file in XnView and choose File > Export As PNG; the Batch Convert tool handles entire folders at once.

About these formats

.PNM Portable Anymap

A PNM file is a Portable Anymap - a simple, uncompressed raster image covering three sub-formats: PBM (black & white), PGM (grayscale), and PPM (color). Open it with GIMP, IrfanView, or…

Open .PNM details →
.PNG Portable Network Graphics

A PNG (Portable Network Graphics) is a lossless raster image format. Every modern OS, browser, and image app opens PNGs natively - just double-click. The most common questions are not about…

Open .PNG details →

Quality & what to watch

  • No pixels are changed - PNM and PNG are both lossless, so you can convert back to PNM later with identical image data.
  • PNG compression cuts file size dramatically: a binary PPM at 1920×1080 is roughly 6 MB, while the equivalent PNG is often under 1 MB.
  • PNM carries no metadata or color profile, so the PNG output will also have none - add a color profile separately if your workflow requires it.

Frequently asked questions

Does converting PNM to PNG lose quality?
No. Both formats are lossless, so every pixel is preserved exactly and the image looks identical.
Why is the PNG so much smaller than my PNM file?
PNM stores raw, uncompressed pixel data. PNG applies lossless compression to the same data, shrinking the file significantly without changing any pixels.
Can I convert PBM, PGM, and PPM files the same way?
Yes - PNM is an umbrella term for all three sub-formats, and the tools above handle each one automatically.
How do I batch-convert many PNM files to PNG?
Use ImageMagick's magick mogrify -format png *.pnm command, or the built-in Batch Convert tool in XnView MP.