3FR to AVIF Converter
FileFlip converts 3FR to AVIF 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 a 3FR file to AVIF?#
- Drop your 3FR 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 AVIF 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 AVIF file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting 3FR to AVIF lose quality?#
Yes, once. 3FR keeps everything and AVIF does not, so this is the first time the file meets a lossy encoder. At high quality the difference is hard to see, and it is worth keeping the 3FR original, because every later re-save of the AVIF loses a little more.
Is it safe to convert 3FR files online?#
Yes, because nothing is uploaded. FileFlip converts 3FR 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 3FR to AVIF actually does to the file#
Converting 3FR to AVIF runs on ImageMagick, downloads 14.1 MB of WebAssembly the first time and nothing after that, encodes a lossless source with a lossy encoder for the first time.
| Engine | ImageMagick |
|---|---|
| Conversion path | One step: 3FR → AVIF |
| Downloaded to your browser | 14.1 MB, once, then cached by your browser |
| Quality | Lossy, first generation |
| 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 a 3FR file?#
A 3FR file stores raw, minimally processed sensor data captured by a Hasselblad medium-format digital camera or digital back, a proprietary format Hasselblad introduced in 2006 with the H2D.
Shoot 3FR when working on a Hasselblad system and processing in Phocus, where the format's full sensor data and metadata are used as intended.
Convert 3FR to DNG or TIFF once editing is finished, since Phocus is the software most reliably guaranteed to read it and most archives and labs expect a more interoperable format.
What is an AVIF file?#
An AVIF file holds a still image or short animation encoded with the AV1 video codec, packaged inside a HEIF-style container that also carries HDR and wide-colour-gamut data alongside the pixels.
Use AVIF for web images where file size matters most, since it now decodes natively in every major browser and beats JPEG and WebP on compression at the same quality.
Convert AVIF to JPEG or PNG when a file is headed somewhere that still rejects it, such as an older content management system, a print workflow, or an app without AV1 decoding.
3FR to AVIF questions people ask#
What camera shot my 3FR file?
A 3FR file was shot on a Hasselblad medium-format digital camera or digital back, such as the H-series or X-series bodies. Hasselblad introduced the format in 2006 with the H2D.
What opens a 3FR file?
Hasselblad's own Phocus software gives the most reliable results with 3FR since Hasselblad builds it specifically for their raw pipeline. Adobe Camera Raw, Lightroom and Capture One also read 3FR, though support can lag behind a brand-new Hasselblad body.
Is 3FR the same as Hasselblad's FFF format?
No. Both are Hasselblad raw formats, but FFF is an older container inherited from Imacon after Hasselblad acquired it in 2004, while 3FR is the format Hasselblad introduced with the H-series in 2006. Which one a file uses depends on which Hasselblad product produced it.
What should I convert a 3FR file to for long-term storage?
DNG keeps the raw sensor data and metadata in an openly documented container that doesn't depend on Phocus staying available, which makes it a safer archival choice than leaving files as 3FR.