SUN to RICH Text Format conversion is the process of transforming a SUN raster image (Sun Rasterfile, often with a .sun or .ras extension) into an editable RTF (Rich Text Format) document by embedding or converting the image content into an RTF-compatible format. This conversion preserves the visual image while packaging it inside an RTF container so it can be opened and distributed by word processors that support RTF images and OLE/embedded graphics.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
Learn how to convert photos for social media the right way. This guide covers the best image format for Instagram, Facebook, LinkedIn, and X, common social media image sizes, handling HEIC from iPhone, sRGB color, aspect ratios, and how to resize photos for social so your uploads stay sharp.
Read guide →Choosing between image file formats affects quality, speed, compatibility, privacy, and long-term storage. This guide explains JPG vs PNG vs WebP, when newer formats like AVIF and HEIC make sense, and how to pick the best image format for photos, screenshots, logos, ecommerce images, print files, archives, transparency, animation, and everyday conversion workflows.
Read guide →Product photos are rarely ready for every marketplace the moment they leave a camera or design tool. Shopify, Etsy, Amazon, eBay, and WooCommerce each have different expectations for file type, dimensions, background, compression, and zoom quality. This guide explains how to convert product images cleanly, choose the right ecommerce formats, preserve detail, and prepare reliable batches for faster listings.
Read guide →Drag your .SUN file from your computer or use the browse function.
Confirm .rtf as the selected destination format.
Click "Convert" and download your converted .RTF file once ready.
The SUN file format typically uses the MIME type application/x-sun and is often used in specialized document storage systems. RTF files have the MIME type application/rtf, supporting cross-platform text document exchange. Conversion involves decoding SUN codecs and re-encoding content to the widely supported RTF structure.
The RICH Text Format (.RTF) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like SUN.
While specific technical details aren't available here, RICH Text Format files generally serve the purpose of storing image effectively within their domain.
Easily convert your SUN files to RICH Text Format (RTF) using our reliable online SUN to RTF converter. Our tool ensures fast, secure, and accurate conversion, allowing you to edit and share your documents in a widely supported format without installing any software.
SUN files are specialized and less supported across software applications, while RICH Text Format is widely compatible and editable. Converting SUN to RTF improves accessibility and usability in everyday applications without losing formatting. RTF offers a balance between file size and rich text features compared to SUN format.
Keep individual SUN source files under 10–50 MB for fastest, trouble-free uploads; very large rasters can slow processing or exceed memory limits.
To preserve visual quality, choose PNG as the embedded image format inside RTF (lossless) and set DPI to match the original image resolution.
For batch conversion, zip multiple SUN files before upload or use a batch API endpoint to process many files and receive a zipped set of RTF outputs.
Be aware that RTF is a document format, not a native image format: text-based editing will not convert raster image pixels into editable text or vector shapes.
This SUN converter made my workflow so much easier.
James L.
Editor
Quick and accurate SUN to RTF conversion every time.
Anna M.
Teacher
Reliable tool with no installation needed.
Mark D.
Developer
Start your free SUN to RTF conversion now.
Drag your file here to to upload.
Up to 250MB
Some legacy word processors may have limited support for certain embedded image encodings; if compatibility is required, use PNG embedded as hexadecimal in the RTF for widest support.