ImageText-based

`image/x-portable-bitmap`

PBM (Portable Bitmap)

Reference for image/x-portable-bitmap, the MIME type for PBM monochrome bitmap images in the Netpbm family.

MIME Type Detector

Drop a file to detect its MIME type — no upload, runs in your browser

📄

Drop any file here or click to choose

Expected extensions: .pbm

HTTP Content-Type Header

HTTP Header

Content-Type: image/x-portable-bitmap; charset=utf-8

Associated File Extensions

.pbm

Quick Facts

MIME Type	image/x-portable-bitmap
Category	Image
Type	Text-based (human-readable)
Extensions	.pbm

Common Usage

PBM stores black-and-white (1-bit) images in a minimal text or binary format. It is used in OCR preprocessing, document scanning, fax systems, and as a simple format for academic image processing exercises.

Code Examples

HTML

<!-- Link or embed with explicit type -->
<link rel="stylesheet" href="file.pbm" type="image/x-portable-bitmap">

<!-- Or for script/media elements -->
<script type="image/x-portable-bitmap" src="file.pbm"></script>

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('image/x-portable-bitmap');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'image/x-portable-bitmap' });

nginx

# nginx.conf — add to types block or use default
types {
    image/x-portable-bitmap  pbm;
}

# Or set for a specific location
location /api/ {
    default_type image/x-portable-bitmap;
}