RAS to HEIC Converter

Easily convert RAS to HEIC online for free

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Quick Turnaround

Get your HEIC output within seconds of uploading RAS data. Cloud processing keeps conversions fast even for larger inputs.

Works Everywhere

Desktop, tablet, or phone — the converter runs on any device with a web browser. No platform restrictions for RAS to HEIC conversion.

Batch Uploads

Queue multiple RAS inputs and convert them all to HEIC in one session. Batch processing saves time when you have many files to handle.

How to convert RAS to HEIC

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose heic or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your heic file right afterwards

About formats

RAS (Sun Raster) is a raster image format developed by Sun Microsystems for their SunOS and Solaris Unix workstations, dating to approximately 1982. Sun Raster files store 2D bitmap images with support for 1-bit monochrome, 8-bit indexed color (with a color map), 24-bit true color (BGR byte order), and 32-bit XBGR (with an unused alpha byte). The format uses a 32-byte header containing a magic number (0x59a66a95), width, height, bit depth, data length, raster type (indicating compression), color map type, and color map length, followed by the optional color map data and the pixel data. RAS supports three encoding modes: standard (uncompressed, with each scanline padded to a 16-bit boundary), byte-encoded (run-length encoded using a simple escape-code scheme), and RGB (uncompressed with RGB rather than BGR byte order). Sun Raster was the native image format for Sun's window system and later the OpenWindows desktop environment, serving as the standard format for screenshots, icons, backgrounds, and application graphics on Sun workstations throughout the 1980s and 1990s. One advantage is the format's representation of Unix workstation computing heritage: Sun Raster files from the SunOS/Solaris era document the visual culture of an important computing platform that drove advances in networking, multiprocessing, and graphics workstation design. The format's straightforward structure is another practical strength — the 32-byte header and simple encoding make RAS files easy to parse and convert, even with custom code. RAS files are supported by ImageMagick, GIMP, XnView, and other image processing tools.
Developer: Sun Microsystems
Initial release: 1982
HEIC (High Efficiency Image Container) is Apple's branded implementation of the HEIF (High Efficiency Image File Format) standard that uses HEVC (H.265) as its image compression codec. Apple adopted HEIC as the default photo format on iPhones and iPads starting with iOS 11 in September 2017, replacing JPEG for newly captured images. HEIC files store photographs compressed with the intra-frame coding mode of the HEVC video codec, which applies sophisticated prediction, transform, and entropy coding techniques that achieve roughly 50% better compression than JPEG at equivalent visual quality. The ISOBMFF (ISO Base Media File Format) container supports multiple images in a single file, enabling Live Photos (a still plus a short video clip), burst sequences, depth maps from dual-camera systems, and HDR gain maps that allow compatible displays to render extended dynamic range. HEIC also stores alpha channels, auxiliary images for computational photography features (portrait mode depth data, semantic segmentation masks), and comprehensive EXIF/XMP metadata. One advantage is storage efficiency: iPhones shooting HEIC use roughly half the storage of equivalent JPEG captures with no visible quality loss, a significant benefit on devices where storage is finite and photos accumulate rapidly. The format's integration with Apple's ecosystem is another key strength — HEIC files are natively supported across macOS, iOS, iPadOS, and iCloud Photos, and automatic JPEG transcoding during file sharing ensures compatibility when sending photos to non-Apple devices. HEIC can also be opened by Windows 10/11 (with codec), GIMP, ImageMagick, and Adobe Lightroom.
Developer: MPEG / Apple
Initial release: 2015

Frequently Asked Questions

Why convert RAS to HEIC?

Sun Raster files date back to the SunOS era and few modern tools open them. HEIC brings your image into a widely supported format.

What programs open HEIC files?

HEIC files can be opened in iOS/macOS natively, Windows 10+ (with HEVC codec), Photoshop, and GIMP.

What makes HEIC a good target format?

HEIC offers modern Apple format, excellent compression, HEVC-based. It gives your raw RAS data a proper structure that any image viewer or editor can handle.

How long does RAS to HEIC conversion take?

Most conversions finish within seconds. Processing time depends on your data size and server load, but results are typically ready almost instantly.

How does Convertio protect my uploaded data?

Your RAS data is encrypted during transfer and deleted after processing. Converted HEIC outputs are purged from servers within 24 hours.

Can I convert multiple RAS data at once?

Yes — Convertio supports batch uploads. Queue several RAS inputs and convert them all to HEIC in a single session to save time.