How do I convert PNM to PGM?

Drop your PNM file onto the converter above, make sure PGM is selected, and click Convert. When it's done, download the PGM file — it usually takes a few seconds.

Is it safe to convert PNM to PGM here?

Yes. PNM to PGM conversion happens entirely inside your browser using WebAssembly, so your file is never uploaded to any server.

Is the PNM to PGM converter free?

Yes — free with no watermark. Signed-out visitors can convert 25 files a day, and a free account raises that to 250.

Will converting PNM to PGM reduce quality?

No — PGM preserves the content of your PNM file as faithfully as the format allows.

Can I convert multiple PNM files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.

Can I convert PGM back to PNM?

Yes — use our PGM to PNM converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.

PGM→PNM PNM→PNG PNG→PGM PNM→JPG JPG→PGM PNM→WebP WebP→PGM PNM→JPEG HEIC→PGM PNM→PDF JPEG→PGM PNM→GIF PNM→AVIF PNM→ICO PNM→TIFF PNM→BMP PNM→PSD PNM→EPS PNM→JXL PNM→TGA PNM→DDS PNM→EXR PNM→HDR PNM→JP2 PNM→CUR PNM→PPM PNM→QOI PNM→PCX PNM→PBM PNM→XPM GIF→PGM AVIF→PGM SVG→PGM ICO→PGM TIFF→PGM BMP→PGM HEIF→PGM PSD→PGM EPS→PGM AI→PGM JXL→PGM CR2→PGM NEF→PGM DNG→PGM CR3→PGM ARW→PGM TGA→PGM DDS→PGM EXR→PGM PNG→JPG JPG→PNG PNG→WebP JPG→WebP WebP→PNG WebP→JPG HEIC→PNG HEIC→JPG MP4→MP3 PNG→JPEG JPG→JPEG JPEG→PNG JPEG→JPG PNG→PDF JPG→PDF PDF→PNG PDF→JPG HEIC→WebP MP4→WebP PDF→DOCX DOCX→PDF JPEG→WebP WebP→JPEG PNG→GIF JPG→GIF GIF→PNG GIF→JPG MP4→MOV MOV→MP4 WebP→PDF HEIC→JPEG WebP→GIF GIF→WebP HEIC→PDF MP3→WAV WAV→MP3 JPEG→PDF PDF→JPEG SVG→PNG SVG→JPG HEIC→GIF MOV→MP3 MP4→GIF GIF→MP4 JPEG→GIF GIF→JPEG PNG→AVIF JPG→AVIF AVIF→PNG AVIF→JPG MP3→M4A M4A→MP3 GIF→PDF SVG→PDF PNG→SVG JPG→SVG PDF→SVG SVG→WebP MOV→WebP MP4→WAV MP4→WebM WebM→MP4 WebP→AVIF AVIF→WebP WebP→SVG SVG→JPEG MP4→MKV MKV→MP4 HEIC→AVIF MP4→M4A JPEG→AVIF AVIF→JPEG JPEG→SVG MOV→GIF GIF→MOV WebM→MP3 AVIF→PDF MP3→FLAC FLAC→MP3 MP4→AVI AVI→MP4 MKV→MP3 GIF→AVIF AVIF→GIF SVG→GIF GIF→SVG WebM→WebP MOV→WAV XLSX→PDF CSV→PDF EPUB→PDF PDF→EPUB MOV→WebM WebM→MOV MKV→WebP PNG→ICO JPG→ICO ICO→PNG ICO→JPG MP3→AAC WAV→M4A AAC→MP3 M4A→WAV MP4→FLAC AVI→MP3 MOV→MKV MKV→MOV MOV→M4A DOCX→EPUB EPUB→DOCX CSV→DOCX

PNMPGM

Convert PNM to PGM

Free, fast and private. Your PNM files are converted right in your browser — nothing is uploaded.

Runs in your browser
No watermark
Batch & ZIP download

How to convert PNM to PGM

1
Add your PNM files
Drag and drop PNM files onto the converter, paste them, or click to browse. You can add several at once.
2
Choose PGM
PGM is already selected. Open Options if you want to change quality, size or metadata.
3
Convert
Click Convert. Your files are converted right in your browser in seconds.
4
Download your PGM
Download each PGM file, or everything at once as a ZIP.

PNM vs PGM

From

PNM · Portable Anymap

PNM is the umbrella name for the Netpbm PBM, PGM and PPM formats.

Type: Image
Extension: .pnm
MIME: image/x-portable-anymap
Best for: image processing pipelines

Lossless

All PNM conversions →

PGM · Portable Graymap

PGM is the grayscale member of the Netpbm family: uncompressed, simple and easy to parse.

Type: Image
Extension: .pgm
MIME: image/x-portable-graymap
Best for: grayscale image processing

Lossless

All PGM conversions →

Need it the other way around? Convert PGM to PNM.

PNM to PGM: frequently asked questions

Free, private and in your browser