XBM to PBM Converter
Processing entirely on your device — large files may take a moment.
X BitMap and Portable Bitmap exist for different jobs: XBM is a bitmap stored as C source code — literally an array of hex bytes that a C compiler includes. It was the original X11 icon format, and it still compiles. Convert PBM bitmaps to PNG or JPG for viewing, or emit PBM when a fax/printer pipeline demands it.
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 XBM compares to PBM
| XBM | PBM | |
|---|---|---|
| Structure | C #defines + hex byte array | P1 (ASCII) / P4 (binary) header + bits |
| Types / schema | 1-bit, X11 bit order | 1-bit black & white |
| Compatibility | X11, C compilers, GTK | netpbm, GIMP, ImageMagick |
| Best for | Compiled-in cursors and icons | Print/fax pipelines, 1-bit art |
How to convert XBM to PBM
- 1
Select your files
Drag & drop your XBM 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 PBM". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted PBM file individually, or grab everything at once as a ZIP archive.
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
About the PBM format
PBM is the 1-bit extreme of the netpbm family: every pixel is a single bit, black or white, stored as ASCII digits or packed bytes. Born as part of Jef Poskanzer's Pbmplus toolkit in 1988, it remains the zero-ambition format of choice for fax pipelines, print queues and anything that must never break.
There is nothing inside a PBM to lose: converting to PNG or JPG is a pure expansion, and converting black-and-white art back down to PBM is the standard way to feed old print systems.
+ Strengths
- ✓Trivially parseable — the entire spec fits in a paragraph
- ✓Perfect for 1-bit print and fax pipelines
- ✓Zero patents, zero compression surprises
! Limitations
- −Black and white only — no gray, no color
- −ASCII variant is enormous
- −No alpha channel
Why convert XBM to PBM?
Converting makes sense where the strengths of PBM meet what XBM cannot give you. Trivially parseable — the entire spec fits in a paragraph Meanwhile 1-bit black & white only One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this XBM to PBM 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 XBM to PBM?
No — PBM is a lossless format, so every pixel of the converted image matches your original XBM file. You can also adjust the quality/size balance before converting when the target format supports compression.
Can I convert several XBM 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.
What happens to EXIF data and other metadata?
Conversions here re-encode the image, and re-encoding generally does not carry the original metadata over. If the EXIF data of your XBM files matters (camera model, GPS, timestamps), keep the original file as the master and treat the converted copy as the shareable version.