RAF to BMP Converter
Convert RAF to BMP in your browser. The JPEG preview is converted, and it already carries the Film Simulation (Provia, Velvia, Classic Chrome and so on) chosen in camera. No raw development happens here. You get an uncompressed 24-bit BMP, or 32-bit with alpha when the image has transparency. Nothing is uploaded.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
RAW expected · other image formats also work
How to use RAF to BMP
- 1
Add your RAF files: drop them here, choose them, or paste from the clipboard.
- 2
There is nothing to tune: the BMP is written uncompressed. Resizing and rotating are under More options if you need them.
- 3
Click Convert. Each file is decoded and encoded in a background thread on this device.
- 4
Download the .bmp files one at a time or together as a ZIP.
Why use Aback Images for raf to bmp
Where the BMP goes next
BMP opens in every operating system and browser.
BMP next to RAF
The BMP stores the camera preview's pixels uncompressed, so it can be as large as the 20 to 60 MB raw file, or larger, depending on the preview's resolution.
No new artefacts
The preview inside the RAF is a camera JPEG; the BMP stores its decoded pixels uncompressed, so this step adds no compression damage of its own.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
RAF vs BMP
What changes from RAF to BMP
Encoding: the RAF uses uncompressed or lossless compressed sensor data in Fujifilm's own container; BMP uses usually none; RLE for some 4 and 8-bit files, and the download is an uncompressed 24-bit BMP, or 32-bit with alpha when the image has transparency.
Bit depth: 12 to 16 bits per channel depending on the camera in the RAF; BMP allows 1, 4, 8, 16, 24 or 32 bits per pixel, and the BMP written here has 24 or 32 bits per pixel. The sensor's 12 to 16 bits are not used: the 8-bit camera preview is converted.
Colour: camera RGB from an X-Trans 6×6 or Bayer 2×2 mosaic in the RAF; BMP supports RGB or an indexed palette, written here as 8-bit sRGB.
Metadata: the RAF can carry EXIF and Fujifilm maker notes, including the Film Simulation; BMP can carry nothing beyond the header's resolution fields (and a colour profile in rare V5 headers), but nothing is copied across.
About RAF
RAF is the raw format of Fujifilm cameras, from the X series to the medium-format GFX. Most X-series bodies use an X-Trans sensor with a 6×6 colour filter pattern instead of the usual Bayer 2×2.
RAF is not TIFF at the top level: it opens with the text 'FUJIFILMCCD-RAW', then a header with the camera model and offsets to three blocks: a JPEG preview near the start of the file, a header describing the sensor layout, and the sensor data.
RAF files usually come from Fujifilm X-T, X-H, X-S, X-E, X100 and GFX cameras.
About BMP
BMP stores raw, uncompressed pixels. Files are huge but trivially simple, which is why some legacy Windows software, embedded displays and printers still ask for it.
A BMP is a 14-byte file header ('BM' and the offset to the pixels), a DIB header (40 bytes, or 108 and 124 bytes in the V4 and V5 versions that add colour masks and alpha), an optional palette, then pixel rows padded to 4 bytes and normally stored bottom-up.
When converting RAF to BMP makes sense
BMP is the better choice for legacy software and embedded systems that require it, while RAF suits editing Fujifilm photos in a raw developer.
BMP strengths: No compression artifacts; Read by very old and very simple software. Drawbacks to weigh: Enormous files; Poor support for transparency; No metadata.
Limitations
- X-Trans sensor data is never demosaiced here, so none of the artefacts some raw developers produce from it appear.
- A BMP is uncompressed, about 3 bytes per pixel, or 4 with transparency, so expect a large file.
- Some older programs ignore the alpha channel of a 32-bit BMP and show transparent areas as black or white.
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Frequently asked questions
Does converting RAF to BMP lose quality?
BMP is written uncompressed, so the pixels are stored exactly as decoded. Those pixels come from the camera's JPEG preview, so its compression stays, but nothing new is lost. The sensor's 12 to 16 bits are not used: the 8-bit camera preview is converted.
Which apps open BMP files?
Every operating system and browser.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.