Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your RAF images to WEBP format. This tool works for both professionals and casual users. Convert your images to WEBP in seconds.
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Fujifilm RAW
The unique raw format for Fujifilm's X-Trans sensors.
RAF is the raw image format used by Fujifilm cameras. While it serves the same purpose as other raw formats, RAF files from Fuji's X-Series cameras are special because they contain data from the unique 'X-Trans' sensor array. Unlike standard sensors that use a Bayer pattern (2x2 grid), X-Trans uses a complex 6x6 pixel grid to reduce moiré without an optical low-pass filter. This means RAF files require specialized demosaicing algorithms to process correctly, making software choice more critical for Fuji users than for any other brand.
RAF files store the raw sensor data, a JPEG preview, and metadata. Fuji offers 'Uncompressed' and 'Lossless Compressed' options. The Lossless Compressed option is highly efficient, reducing file sizes significantly with no penalty. Because of the X-Trans pattern, RAF files can sometimes exhibit 'worm' artifacts when sharpened aggressively in Adobe Lightroom. This has led many Fuji users to prefer Capture One or Iridient Developer, which handle the X-Trans demosaicing better.
Fuji has used the RAF extension for decades, from their early FinePix DSLRs to the modern GFX medium format monsters. The format gained prominence with the release of the X-Pro1 in 2012, which introduced the X-Trans sensor.
WebP
Google's versatile format that does it all—transparency, animation, and superior compression.
WebP is a modern image format developed by Google specifically to speed up the web. It is a 'swiss army knife' format that combines the best features of JPEG (lossy compression), PNG (lossless compression and transparency), and GIF (animation) into a single, efficient package. WebP lossless images are typically 26% smaller than PNGs, while WebP lossy images are 25-34% smaller than comparable JPEGs. This significant size reduction helps websites load faster and consume less bandwidth, which is why it is strongly recommended by Google's PageSpeed Insights. After years of partial browser support, WebP is now universally supported across all modern browsers (Chrome, Firefox, Safari, Edge), making it the default choice for delivering optimized images on the web today.
WebP is based on the VP8 video codec (part of the WebM project). **Lossy WebP** uses predictive coding to encode an image, similar to how video keyframes are compressed. It predicts the values of pixels based on their neighbors and only encodes the difference (residual). It operates in the YUV color space. **Lossless WebP** uses advanced techniques like dedicated entropy codes for different color channels, 2D locality of backward reference distances, and a color cache of recently used colors. It operates in the RGBA color space. Uniquely, WebP supports 'lossy with transparency'—a feature JPEG lacks. This allows for transparent images that are significantly smaller than PNGs by applying lossy compression to the RGB channels while keeping the alpha channel sharp (or compressed).
Google announced WebP in September 2010 as a new open standard for lossy true-color graphics. It was derived from the VP8 video codec technology Google acquired from On2 Technologies. In 2011, Google extended the format to support lossless compression, transparency (alpha channel), and animation, effectively positioning it as a replacement for JPEG, PNG, and GIF simultaneously. Adoption was initially slow outside of the Chrome ecosystem. Firefox added support in 2019, and the final major holdout, Apple's Safari, added support in September 2020 (iOS 14 / macOS Big Sur). This universal support marked the turning point where WebP became safe to use as a primary format.
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