PBM to PGM converter
Convert PBM to PGM in seconds, free and unlimited. No upload, no sign-up, no watermark: your image never leaves your device.
Last updated
Quick answer: To convert PBM to PGM, add the PBM file to the iHateFiles PBM to PGM converter and press Convert. The conversion runs in your browser, so the file is never uploaded, and it is free with no sign-up, watermark or size limit. A straight swap between two raster formats, at full resolution.
Should you convert PBM to PGM?
A safe conversion: PBM and PGM are both lossless, so this is a change of container rather than a change to the picture.
Nothing is discarded
PBM and PGM are both lossless, so every pixel survives the move intact. Convert back and forth as often as you like; the image does not degrade.
PBM and PGM side by side
| PBM | PGM | |
|---|---|---|
| Compression | Lossless | Lossless |
| Transparency | No | No |
| Animation | No | No |
| Written here | Yes | Yes |
What usually goes wrong
About the PBM. Converting a photograph to PBM produces something closer to a stencil than a picture. That is the format working correctly, not a fault.
About the PGM. Converting a colour image to PGM throws the colour away for good. Keep the original if you might want it back.
How to convert PBM to PGM
- Add your PBM file. It is read from your disk and stays there.
- Check the settings. The output format is already set to PGM.
- Press convert and the PGM file is saved back to your device.
Questions
How do I convert PBM to PGM?
Open this page, add your PBM file, and press convert. The file is decoded and re-encoded by your own browser and saved back to your device. Nothing is uploaded.
Is this PBM to PGM converter free?
Yes, completely. There is no account, no sign-in, no watermark and no daily limit, because there is no server doing the work. Your own device does it.
Are my files uploaded anywhere?
No. There is no upload endpoint. The conversion runs inside this browser tab, so your file never leaves your device. You can open your browser's network panel and watch: nothing carrying your file is sent.
Is there a file size limit?
No fixed limit. Because the work happens on your machine there is no server quota. The only ceiling is your own device's memory, which for video means very large files may be slow.
Will converting to PGM lose quality?
PGM compresses without loss, but it first reduces the image to greyscale, discarding all colour. Flat colour and line art come through unchanged; a photograph will band and lose subtlety.
Can I convert several PBM files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.