PGM to XBM Converter
Processing entirely on your device — large files may take a moment.
PGM is netpbm's grayscale format — 8 or 16-bit samples, ASCII or binary, zero compression. Computer-vision research and image-processing courses live on it. Convert XBM icons to PNG for viewing, or emit XBM when embedded firmware/Unix code needs a compiled-in bitmap.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How PGM compares to XBM
| PGM | XBM | |
|---|---|---|
| Structure | P2 (ASCII) / P5 (binary) header + samples | C #defines + hex byte array |
| Types / schema | 8/16-bit grayscale | 1-bit, X11 bit order |
| Compatibility | netpbm, OpenCV, MATLAB | X11, C compilers, GTK |
| Best for | Research pipelines, raw luminance | Compiled-in cursors and icons |
How to convert PGM to XBM
- 1
Select your files
Drag & drop your PGM files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to XBM". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted XBM file individually, or grab everything at once as a ZIP archive.
About the PGM format
PGM is netpbm's grayscale format: a two-line text header, then raw 8 or 16-bit luminance samples with no compression and no metadata. That raw honesty made it the default exchange format of computer-vision research, image-processing coursework and any pipeline where "what you read is exactly the pixel value" matters.
Converting PGM to PNG or JPG just normalizes it for humans; converting back down preserves every value bit-exactly when the pipeline needs numbers, not pictures.
+ Strengths
- ✓Bit-exact pixel values, no color management surprises
- ✓16-bit depth support
- ✓Trivially parseable
! Limitations
- −No compression — large files
- −Grayscale only
- −No embedded metadata
About the XBM format
XBM is the most honest image format ever shipped: the "file" is a C source array of hex bytes, compiled straight into X11 applications as cursor and icon bitmaps. Rendered, it is 1-bit black and white — the ancestors of every pixel-art cursor you still use.
Because it compiles, XBM never died: firmware UIs, embedded icons and retro Unix tooling still want it. Converting a PNG down to XBM gives embeddable, compilable art; the other direction previews what the C array actually draws.
+ Strengths
- ✓Compiles directly into C/C++ programs
- ✓Zero-payload format — text only
- ✓Still required by embedded and Unix tooling
! Limitations
- −1-bit black & white only
- −Human-hostile representation
- −X11 bit order trips up hand-rolled decoders
Why convert PGM to XBM?
Converting makes sense where the strengths of XBM meet what PGM cannot give you. Compiles directly into C/C++ programs Meanwhile No compression — large files One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this PGM to XBM converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Will I lose quality converting PGM to XBM?
No — XBM is a lossless format, so every pixel of the converted image matches your original PGM file. You can also adjust the quality/size balance before converting when the target format supports compression.
Will transparent areas survive the conversion to XBM?
Transparency is kept whenever XBM actually supports an alpha channel. If the target format has none (like JPG), transparent areas are flattened onto a white background — that is a property of the format, not of this tool.
Can I convert several PGM files at once?
Yes — drop as many files as you like into the tool and they are converted in one batch. When more than one file comes out, everything is bundled into a ZIP for a single download.