SRF to FB2 Converter
FileFlip converts SRF to FB2 entirely inside your browser, using ImageMagick, MuPDF and Pandoc 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 FB2?#
- 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 FB2 and the conversion starts on its own. FileFlip downloads 79.9 MB of WebAssembly the first time and nothing after that, then runs ImageMagick, MuPDF and Pandoc on your own machine.
- Save the FB2 file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting SRF to FB2 lose quality?#
No. The SRF picture is placed into the FB2 document at its full resolution, so every pixel reaches it intact. What you give up is that it becomes a picture inside a document rather than text.
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 FB2 actually does to the file#
Converting SRF to FB2 runs on ImageMagick, MuPDF and Pandoc, downloads 79.9 MB of WebAssembly the first time and nothing after that, places the picture into the document at full resolution.
| Engine | ImageMagick, MuPDF and Pandoc |
|---|---|
| Conversion path | 3 steps: SRF → PNG → HTML → FB2 |
| Downloaded to your browser | 79.9 MB, once, then cached by your browser |
| Quality | Pixels preserved |
| 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
- the picture is placed in the document as a picture; no text is recognised out of it
- the file passes through HTML on the way, so anything HTML cannot express does not survive
- 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 an FB2 file?#
An FB2 file is a single XML document that holds an entire book's text, metadata and base64-encoded cover images, in the FictionBook format that originated in the Russian-language ebook scene.
Keep a book as FB2 when it is sourced from a Russian-language ebook library and the reader is FB2-native, such as FBReader or a PocketBook device.
Convert FB2 to EPUB to read the book on a device or app outside the small set of readers that understand FictionBook directly.
SRF to FB2 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.
What is an FB2 file?
An FB2 file is an ebook in the FictionBook format, a single XML document that holds the full text, metadata and any cover image in one file rather than the zipped archive EPUB uses. It was created in 2004 and is most common in Russian-language ebook collections.