RAS to WEBP Converter
Convert a Sun Raster bitmap to a compact WEBP. Drop a RAS file below — conversion happens locally on your device, so the file never leaves your computer.
Drop files, or click to browse
RAS files only — any size, any number of files
Frequently asked questions
Is this RAS to WEBP converter really free?+
Yes. There's no file limit, no watermark, and no account required. Because the conversion runs in your browser instead of on a server, there's no processing queue to pay for.
Is my file uploaded anywhere?+
No. Orbfile decodes and re-encodes the image locally using ImageMagick compiled to WebAssembly, running entirely inside your browser tab. The bytes never leave your device.
Will converting to WEBP lose quality?+
There's a quality slider so you can balance file size against visual quality. At high quality settings the difference is usually invisible.
Can I convert more than one file at once?+
Yes — drop as many files as you like and download them individually or as a single ZIP.
Is there a maximum file size?+
There's no fixed upload limit — Orbfile isn't uploading anything. The practical ceiling is your device's own memory, which comfortably handles even large, high-resolution photos.
How do I convert RAS to WEBP?+
Drop your RAS file into the box above — it's automatically converted to WEBP and a download link appears in seconds. No settings are required, though you can adjust quality if the tool offers a slider.
About RAS and WEBP
What is RAS?
RAS (Sun Raster) is the native bitmap format of Sun Microsystems' SunOS/Solaris workstations from the 1980s and 90s.
Full RAS format guide →What is WEBP?
WEBP is Google's web-focused image format, offering both lossy and lossless modes plus transparency in one file type.
Full WEBP format guide →People usually reach for this conversion because WEBP offers typically 25–35% smaller than JPG at equal quality, sidestepping a real RAS weak spot: no transparency support. It's especially useful for web pages that want faster load times.
How it works
- 1
Drop your file in
Drag your image onto the box above, or click it to browse — there's no account to create and no upload to wait on.
- 2
Pick your settings
The output format is already set for this page — just adjust any extra options shown, if there are any.
- 3
Download the result
Your browser processes everything locally and hands you a download link the moment it's done — nothing was ever sent to a server.
Is it private?
Everything happens locally, inside this browser tab. Your image is read from disk, processed with WebAssembly running on your own device, and handed back to you as a download — it's never transmitted anywhere, so there's nothing to intercept and nothing stored on a server.
Common use cases
- Web pages that want faster load times
- Replacing PNG for graphics with transparency
- Preparing images for a website or online store
- Attaching a photo to an email with a size limit
Supported formats
This is one of many pairings the image toolkit handles. In total it covers:
Related conversions
Format details
About RAS files+
RAS (Sun Raster) is the native bitmap format of Sun Microsystems' SunOS/Solaris workstations from the 1980s and 90s.
Sun Raster was the default way SunOS and early Solaris systems stored screen captures and bitmap images, defined in Sun's own rasterfile.h header in 1989. A file opens with a fixed 32-byte header carrying its magic number, dimensions, and bit depth, optionally followed by a color palette and then the pixel data itself, either stored raw or run-length encoded. It supports 1-, 4-, 8-, 24-, and 32-bit depths but no transparency, and while it was genuinely common on Unix workstations in its day, it's now almost exclusively encountered when working with archived files from that era.
How to open a RAS file
Opens readily in For real editing, use GIMP, IrfanView, ImageMagick.
Modern operating systems have no built-in viewer for RAS — a converter or an editor with RAS support is needed.
Good for
- simple, well-documented header — easy for tools to parse
- supports both raw and RLE-compressed pixel data
Watch out for
- no transparency support
- obsolete outside legacy Unix/Solaris archives
About WEBP files+
WEBP is Google's web-focused image format, offering both lossy and lossless modes plus transparency in one file type.
Google introduced WebP in 2010 to tackle a specific problem: the average web page was (and still is) dominated by image weight, and neither JPEG nor PNG alone could losslessly compete on both photos and graphics. WebP borrows compression techniques from video codecs to squeeze photographic images noticeably smaller than JPEG at the same visual quality, while its lossless mode competes with PNG for graphics — all while still supporting transparency and even simple animation in one container. Adoption was slow at first, but every major browser now supports it natively, which is why so many websites quietly serve WebP images today to cut load times.
How to open a WEBP file
Opens readily in Any modern web browser, Windows Photos and macOS Preview (recent versions). For real editing, use GIMP, Affinity Photo, Photoshop (with a plugin on older versions).
Good for
- typically 25–35% smaller than JPG at equal quality
- supports transparency like PNG
- supported by every modern browser
Watch out for
- a handful of older tools and legacy CMSes still don't open it directly
Need a different format? Try the full Image Converter, or explore all image tools.