.pbm PBM image
Images
| MIME type | image/x-portable-bitmap |
|---|---|
| Description | PBM image |
| Acronym | PBM – Portable BitMap |
| Category | Images |
| Signature (magic bytes) | 50 31 (P1)50 34 (P4) |
| Based on | image/x-portable-anymap |
Frequently asked questions
What is a .pbm file?
A .pbm file is a “PBM image” (MIME type image/x-portable-bitmap). PBM stands for Portable BitMap.
How do I open a .pbm file?
With any image viewer that supports the format – the Photos app on Windows, Preview on macOS, Eye of GNOME or GIMP on Linux. For unusual formats a converter such as ImageMagick helps.
How can you tell a genuine .pbm file?
By the bytes at the start of the file, the signature (magic bytes): 50 31 (P1) and 50 34 (P4). On Linux and macOS, file --mime-type example.pbm checks the real type regardless of the extension.
Which format is .pbm based on?
Technically a .pbm file is a subtype of “PNM image” (image/x-portable-anymap), so programs for that base format can often read it too.
Which MIME type belongs to .pbm?
The MIME type is image/x-portable-bitmap. In the Apache web server: AddType image/x-portable-bitmap .pbm; in nginx: types { image/x-portable-bitmap pbm; }.