RAF Image to OTB conversion is the process of transforming Fujifilm RAW files (RAF) — which contain unprocessed sensor data, metadata and high dynamic range — into the OTB container format used for tiled and optimized image storage. This conversion extracts the image data, applies any chosen demosaic and compression settings, and repackages the result into an OTB file suitable for efficient viewing, tiling, or archival.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
WebP has quietly become the default image format of the modern web, delivering 25-35% smaller files than JPG and PNG with universal browser support. This 2026 guide covers current adoption stats, browser compatibility, WordPress integration, conversion workflows, and when to choose WebP over AVIF for optimal Core Web Vitals performance.
Read guide →Not sure whether to save your image as PNG or JPG? This detailed comparison covers compression, transparency, file size, web performance, and real-world use cases so you can pick the right format every time — with conversion links when you need to switch.
Read guide →Learn how to convert HEIC to JPG for maximum compatibility. This guide explains what HEIC is, why iPhones use it, the key differences between HEIC and JPG, and walks through every conversion method including online tools, iPhone settings, Windows, and Mac.
Read guide →Drag your .RAF file from your computer or use the browse function.
Confirm .otb as the selected destination format.
Click "Convert" and download your converted .OTB file once ready.
RAF files use the image/raf MIME type and typically contain raw sensor data encoded with Fujifilm's proprietary codecs. OTB files usually have the image/otb MIME type and are designed for efficient storage and faster access in specific imaging applications. RAF is common in professional photography, whereas OTB supports streamlined workflows requiring compact files.
The OTB (.OTB) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like RAF Image.
While specific technical details aren't available here, OTB files generally serve the purpose of storing image effectively within their domain.
Our online RAF to OTB converter allows you to easily convert your RAF Image files into the OTB format without any hassle. Whether you need OTB for better compatibility or specific applications, our tool delivers fast, reliable results directly in your browser.
RAF Image files are raw images captured directly from Fujifilm cameras, containing unprocessed sensor data. OTB is a specialized file format optimized for faster rendering and smaller file sizes. While RAF preserves maximum image detail for editing, OTB is better suited for quick viewing and sharing.
Keep original RAF files backed up: always keep the source RAF to preserve full raw data and original metadata.
Preserve quality: for best results choose lossless OTB or high-quality compression; aggressive compression can remove subtle color and tonal information captured in RAF files.
Optimal file sizes: complete RAF frames commonly range from 20–80MB; converting to OTB with lossless compression will often be similar or slightly smaller, while lossy OTB can reduce sizes by 2–10x depending on quality settings.
Batch conversion: convert multiple RAFs in batches to save time; use presets for consistent quality and compression across a set of images.
Converting my RAF images to OTB online saved me so much time.
John M.
Photographer
The RAF Converter is simple and produces excellent results every time.
Emma R.
Graphic Designer
I love how quick and secure the RAF to OTB conversion process is here.
David L.
Content Creator
Start your free RAF to OTB conversion now.
Drag your file here to to upload.
Up to 250MB
Format limitations: OTB is a storage/tiling container and may not retain some RAW-only capabilities (like full raw development parameters or camera-specific sensor transforms); further RAW editing should be done on the RAF before conversion when possible.