How to convert JPG to PBM
To convert JPG to PBM, upload your JPG file, choose PBM as the output format and press Convert. The finished PBM file is ready to save to your phone or computer in seconds, free, with no watermark and no sign-up. Your file is deleted from our server about 30 minutes after the conversion.
This free online converter changes JPG images into PBM files in seconds, with no software to install and no watermark. You can convert several files at once, resize them and choose the quality for formats that support it. Metadata such as location tags is removed from the output for privacy.
What you get with JPG to PBM
- Simplest possible image format
- Tiny for line art
- Easy for scripts to handle
- Works with: GIMP, ImageMagick, Netpbm and most scientific tools
What to expect from this conversion
- JPG is lossy and PBM is not, so the file will usually get larger. Converting cannot bring back detail that JPG compression already removed.
- PBM is pure black and white, so every pixel becomes either black or white and photographs lose their tones.
- Browsers do not display PBM files, so use it in editors, print workflows or development tools rather than on a web page.
JPG vs PBM
| Property | JPG | PBM |
|---|---|---|
| Full name | Joint Photographic Experts Group | Portable Bitmap |
| Released | 1992, JPEG committee | 1988, Jef Poskanzer (Netpbm) |
| Compression | Lossy | None (uncompressed) |
| Transparency | No | No |
| Animation | No | No |
| Bit depth | 8-bit | 1-bit |
| Shown in browsers | Yes | No |
| Best for | photographs; website images | line art and scans; fax-style documents |
Steps to convert JPG to PBM
- Drop your JPG image file onto the converter, or click to choose it.
- Check that PBM is selected as the target and adjust the options if you want.
- Press Convert, then download your new PBM file when it finishes.
Tips for the best result
- Use quality 80 to 90 for photos: it is visually close to the original at a much smaller size.
- Set a width if the image will be shown on a small screen, which also reduces the file size.
- Choose a background colour before converting transparent images to a format without transparency.
Frequently asked questions
How do I convert JPG to PBM?
Drop your JPG files on the converter, confirm that PBM is the target and press Convert. Download each file or the whole batch as a ZIP.
Is the JPG to PBM converter free?
Yes. It is free with no watermark, no sign-up and no limit on how many images you convert. The site is supported by ads.
Does converting JPG to PBM reduce quality?
JPG is lossy and PBM is not, so the file will usually get larger. Converting cannot bring back detail that JPG compression already removed. The quality slider only affects formats that use lossy compression.
Will transparency be kept when I convert JPG to PBM?
JPG images do not contain transparency, so there is nothing to lose. PBM does not support it either.
Which programs open PBM files?
PBM files open in GIMP, ImageMagick, Netpbm and most scientific tools.
How many images can I convert at once?
Up to 20 images per batch, each up to 60 MB. Files are deleted from the server about 30 minutes after conversion.