SRF to BMP Converter
FileFlip converts SRF to BMP entirely inside your browser, using ImageMagick compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert an SRF file to BMP?#
- Drop your SRF file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to BMP and the conversion starts on its own. FileFlip downloads 14.1 MB of WebAssembly the first time and nothing after that, then runs ImageMagick on your own machine.
- Save the BMP file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting SRF to BMP lose quality?#
No. Converting SRF to BMP writes the data out again without discarding any of it, so nothing that was in the SRF file is lost on the way. What changes is the size of the file, not what is inside it.
Is it safe to convert SRF files online?#
Yes, because nothing is uploaded. FileFlip converts SRF files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What SRF to BMP actually does to the file#
Converting SRF to BMP runs on ImageMagick, downloads 14.1 MB of WebAssembly the first time and nothing after that, writes the data out again without discarding any of it.
| Engine | ImageMagick |
|---|---|
| Conversion path | One step: SRF → BMP |
| Downloaded to your browser | 14.1 MB, once, then cached by your browser |
| Quality | Lossless |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
Worth knowing before you start:
- camera raw is demosaiced with ImageMagick's defaults, which will not match the camera's own rendering
- some cameras write lossily compressed raw, so the source is not always a complete sensor record
What is an SRF file?#
An SRF file stores raw sensor data from an early Sony Cyber-shot camera such as the DSC-F828, with parts of the file encrypted so that, originally, only Sony's own software could fully decode the white balance and color data.
SRF only exists as the format an old Cyber-shot camera such as the DSC-F828 already wrote; there's no reason to choose it today.
Convert SRF files to DNG or JPEG, since current raw processors have far better support for those than for Sony's original encrypted raw format.
What is a BMP file?#
A BMP file holds a device-independent bitmap: a pixel grid stored with a Microsoft-defined header and, in the overwhelming majority of BMP files in the wild, no compression at all.
Use BMP when a Windows-native application, printer driver, or legacy tool specifically expects it, or when pixel data has to be stored with zero encoding overhead for a processing pipeline.
Convert BMP to PNG or JPEG for anything leaving that pipeline, since both produce a far smaller file and PNG matches BMP's lossless, generation-safe quality.
SRF to BMP questions people ask#
What Sony camera creates SRF files?
SRF files come from early Sony Cyber-shot cameras, most notably the DSC-F828, which was among the first Sony cameras to offer raw capture. Sony moved on to the SR2 and later ARW formats within a few years.
Why do colors look wrong when I open an SRF file?
SRF files from Sony's early Cyber-shot cameras have parts of the file encrypted, including white balance and color data, so software that hasn't worked around that encryption can decode the image but not its correct color rendering.
Can current raw software open SRF files?
Some can. Adobe Camera Raw and Lightroom Classic retain legacy support for SRF, and open-source tools like darktable and RawTherapee decode it through libraries that reverse-engineered Sony's encryption, but support is far thinner than for Sony's current ARW format.
Why are BMP files so much bigger than JPEG or PNG?
Most BMP files store every pixel's color value directly with no compression, so a BMP is close in size to the raw uncompressed image data. JPEG and PNG both apply compression, lossy in JPEG's case and lossless in PNG's, which is why the same photo saved as either is a fraction of the size of a BMP.