JPG to RAS Converter
Convert a JPG into the legacy Sun Raster bitmap format. Drop a JPG file below — conversion happens locally on your device, so the file never leaves your computer.
Drop files, or click to browse
JPG files only — any size, any number of files
Frequently asked questions
Is this JPG to RAS 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 RAS 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 JPG to RAS?+
Drop your JPG file into the box above — it's automatically converted to RAS and a download link appears in seconds. No settings are required, though you can adjust quality if the tool offers a slider.
About JPG and RAS
What is JPG?
JPG (or JPEG) is the format most cameras and phones save photos in by default — it uses lossy compression tuned for photographic detail.
Full JPG format guide →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 →The short version: RAS gives you simple, well-documented header — easy for tools to parse, which helps once you run into JPG's biggest limitation: no transparency. It's a natural move when your image is headed toward opening or converting old Sun workstation screen captures and bitmap files.
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
- Opening or converting old Sun workstation screen captures and bitmap files
- Preparing images for a website or online store
- Attaching a photo to an email with a size limit
- Getting a screenshot ready to share or document
Supported formats
This is one of many pairings the image toolkit handles. In total it covers:
Related conversions
Format details
About JPG files+
JPG (or JPEG) is the format most cameras and phones save photos in by default — it uses lossy compression tuned for photographic detail.
JPEG (Joint Photographic Experts Group) works by discarding image detail the human eye is least likely to notice, which is why it can shrink a photo to a fraction of its uncompressed size while still looking sharp at normal viewing sizes. That efficiency, combined with support baked into virtually every camera, phone, browser, and operating system since the early 1990s, made it the default photo format for the web and for personal photo libraries alike. The tradeoff is that JPEG is lossy: every time a file is re-saved, a little more detail is discarded, and it has no support for transparency, so it's a poor fit for logos or graphics that need to sit on any background.
How to open a JPG file
Opens readily in Any web browser, Your operating system's default photo viewer. For real editing, use Adobe Photoshop, GIMP, Affinity Photo.
Good for
- small file sizes for photos
- supported by literally every image viewer, browser, and app ever made
Watch out for
- no transparency
- visible artifacts if compressed too aggressively
- re-saving repeatedly degrades quality
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
Need a different format? Try the full Image Converter, or explore all image tools.