XPM to WebP Converter
Processing entirely on your device — large files may take a moment.
XPM (X11 Pixmap) is an image written as C source code — plain ASCII text that compilers and editors ingest directly, the classic icon format of Linux desktops and legacy X11 apps. WebP is the go-to format for fast websites: smaller files mean quicker pages, lower bandwidth and better SEO scores.
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 XPM compares to WebP
| XPM | WebP | |
|---|---|---|
| Compression | None (ASCII text) | Lossy and lossless modes |
| Transparency | Single transparent color | Supported (alpha) |
| Animation | Not supported | Supported |
| Metadata | Not supported | EXIF, ICC embeddable |
| Best for | Linux icons, X11 themes | Web images and bandwidth savings |
How to convert XPM to WebP
- 1
Select your files
Drag & drop your XPM 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 WebP". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted WebP file individually, or grab everything at once as a ZIP archive.
About the XPM format
XPM (X11 Pixmap) is an image format that is literally C source code: pixels are listed as character-to-color mappings inside an ASCII array. Compilers, text editors and version control all treat it as plain text, which is why Linux desktop icons and legacy X11 application assets have used it for decades.
XPM is limited to 256 colors per image and stores no alpha beyond a designated transparent character, so it is a niche target: mainly icon themes, window-manager decorations and retro programming projects.
+Strengths
- ✓Plain text — diffs and greps
- ✓Compiles straight into C programs
- ✓Tiny for small flat icons
!Limitations
- −256 colors maximum
- −Poor alpha (one transparent color)
About the WebP format
WebP is Google's image format, released in 2010 and built on the VP8 video codec. In lossy mode it typically produces files 25–35% smaller than JPG at the same visual quality, and it also has a true lossless mode that beats PNG. Crucially, one format covers what used to require two: lossy photos with transparency, and even animation, all in a single container.
Browser support is no longer the barrier it once was: Safari added WebP in iOS 14 (2020), and every modern browser now decodes it. The remaining friction is with older desktop software and a hard dimension limit of 16383×16383 pixels, which rules out very large panoramas and print masters.
+Strengths
- ✓25–35% smaller than JPG at equal visual quality
- ✓Transparency and animation built into the same format
- ✓Supported by every current browser and most CDNs
- ✓Has a genuine lossless mode that out-compresses PNG
!Limitations
- −Hard limit of 16383×16383 pixels per image
- −Older photo apps and OS image viewers may not open it
- −Encoding is more CPU-intensive than JPG
Why convert XPM to WebP?
Think of it as moving your file to the container that fits the job. 256 colors maximum WebP works differently: 25–35% smaller than JPG at equal visual quality If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this XPM to WebP 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 converting XPM to WebP reduce quality?
WebP uses lossy compression, so a small amount of recompression is unavoidable. The quality slider lets you choose between maximum fidelity and smallest file size — the default is visually indistinguishable for photos.
Will transparent areas survive the conversion to WebP?
Transparency is kept whenever WebP 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.
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 XPM files matters (camera model, GPS, timestamps), keep the original file as the master and treat the converted copy as the shareable version.