How to convert PNG to PPM
To convert PNG to PPM, upload your PNG file, choose PPM as the output format and press Convert. The finished PPM 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 PNG images into PPM 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.
Why convert PNG to PPM?
- Trivial to read and write
- No compression artefacts
- Perfect for scripts and teaching
- Works with: GIMP, ImageMagick, Netpbm, OpenCV and Python imaging libraries
What to expect from this conversion
- Both formats store the pixels without loss, so the picture stays identical. Only the file size and compatibility change.
- PPM has no transparency, so transparent areas are filled with a background colour. White by default, and you can choose another colour in the options.
- Browsers do not display PPM files, so use it in editors, print workflows or development tools rather than on a web page.
PNG vs PPM
| Property | PNG | PPM |
|---|---|---|
| Full name | Portable Network Graphics | Portable Pixmap |
| Released | 1996, PNG Development Group / W3C | 1988, Jef Poskanzer (Netpbm) |
| Compression | Lossless | None (uncompressed) |
| Transparency | Yes | No |
| Animation | No | No |
| Bit depth | 8-bit or 16-bit | 8 or 16-bit |
| Shown in browsers | Yes | No |
| Best for | screenshots and UI graphics; logos with transparent backgrounds | computer-vision and graphics classes; scripting pipelines |
Steps to convert PNG to PPM
- Drop your PNG image file onto the converter, or click to choose it.
- Check that PPM is selected as the target and adjust the options if you want.
- Press Convert, then download your new PPM 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 PNG to PPM?
Drop your PNG files on the converter, confirm that PPM is the target and press Convert. Download each file or the whole batch as a ZIP.
Is the PNG to PPM 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 PNG to PPM reduce quality?
Both formats store the pixels without loss, so the picture stays identical. Only the file size and compatibility change. The quality slider only affects formats that use lossy compression.
Will transparency be kept when I convert PNG to PPM?
PPM does not support transparency, so transparent areas are filled with your chosen background colour (white by default).
Which programs open PPM files?
PPM files open in GIMP, ImageMagick, Netpbm, OpenCV and Python imaging libraries.
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.