PGM to PBM converter
Convert PGM to PBM in seconds, free and unlimited. No upload, no sign-up, no watermark: your image never leaves your device.
Last updated
Quick answer: To convert PGM to PBM, add the PGM file to the iHateFiles PGM to PBM 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 PGM to PBM?
A safe conversion: PGM and PBM are both lossless, so this is a change of container rather than a change to the picture.
Nothing is discarded
PGM and PBM are both lossless, so every pixel survives the move intact. Convert back and forth as often as you like; the image does not degrade.
PGM and PBM side by side
| PGM | PBM | |
|---|---|---|
| Compression | Lossless | Lossless |
| Transparency | No | No |
| Animation | No | No |
| Written here | Yes | Yes |
What usually goes wrong
About the PGM. Converting a colour image to PGM throws the colour away for good. Keep the original if you might want it back.
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.
How to convert PGM to PBM
- Add your PGM file. It is read from your disk and stays there.
- Check the settings. The output format is already set to PBM.
- Press convert and the PBM file is saved back to your device.
Questions
How do I convert PGM to PBM?
Open this page, add your PGM 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 PGM to PBM 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 PBM lose quality?
PBM compresses without loss, but it first reduces the image to one bit per pixel, pure black and white. Flat colour and line art come through unchanged; a photograph will band and lose subtlety.
Can I convert several PGM files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.