3FR to AVIF Converter

Converting a Hasselblad 3FR to AVIF: What This Tutorial Covers

A .3fr file is the raw capture written by a Hasselblad medium-format camera — a single, very large, high-bit-depth sensor negative meant for editing in Hasselblad Phocus, Lightroom, or Camera Raw. AVIF (AV1 Image File Format) is a modern web still: AV1-coded image data in a HEIF container that compresses photographs far smaller than JPEG at the same visual quality. This walk-through is for photographers and portfolio builders who want a small, sharp web copy of a medium-format shot — and it is honest about the two things you give up (raw editing latitude and most of the sensor's resolution) so you keep the .3fr as your master.

How to Convert 3FR to AVIF

1. Upload Your 3FR File: Drag and drop your .3fr onto the page or click "+ Add Files" to browse. You can queue several captures and convert them with the same settings.
2. Pick a Quality Preset: Open Advanced Options and choose a "Quality Preset" — it defaults to "Very High (Recommended)". This sets how hard AVIF compresses; higher presets keep more detail and produce a larger file.
3. Set the Resolution (Optional): Under "Image resolution", keep "Keep original" to retain full medium-format pixels, or downscale with "Preset Resolutions" or the "Width x Height" fields for a lighter web image.
4. Convert and Download: Click "Convert" and download your AVIF. No sign-up, no watermark.

Walk-through: Choosing Quality, Size, and Resolution

The output you want depends entirely on where the AVIF is going. Three controls do almost all the work, and they interact:

• If you want the best-looking web image regardless of size — keep "Quality Preset" on "Very High" and leave "Image resolution" on "Keep original". You will still get a much smaller file than a JPEG export of the same render, because AVIF is roughly 50% smaller than JPEG at matched quality.
• If you need to hit a specific weight (an email cap, a CMS upload limit, a page-speed budget) — switch from "Quality Preset" to "Specific file size" and type a target such as 2 MB. The converter compresses to land near that size.
• If the image only needs to fill a web layout — leave quality high but downscale under "Image resolution". A 50-megapixel capture is far larger than any screen needs; setting "Width x Height" to, say, 2048px wide drops the file dramatically with no visible loss at display size.
• For finer control, expand "Show All Options". AVIF output exposes a lossless toggle (off by default, so the file stays small) and a bit-depth choice; lossless is for archival exactness and produces a much larger file, so leave it off for web delivery.

Common Errors and How to Fix Them

• "The AVIF won't open / shows a broken image." The viewer or browser is too old. AVIF is supported in roughly 93% of browsers worldwide, but support arrived on a schedule — Chrome 85+, Firefox 93+, Safari 16.4+, and Edge 121+. Open it in an up-to-date browser, or use convert 3FR to JPG for a universally readable file.
• "The photo looks flat or the white balance is off." That tone was baked in when the raw was rendered. AVIF stores a finished image, not adjustable raw data — fix exposure and white balance in Phocus or Lightroom first, then convert. (See the latitude FAQ below.)
• "The file is bigger than I expected." You likely kept the full medium-format resolution, or lossless is on. Downscale under "Image resolution", lower the "Quality Preset", or confirm the lossless toggle under "Show All Options" is off.
• "The colors look duller than in Phocus." Phocus may be showing a wide-gamut working space. AVIF can carry wide-gamut and HDR data, but a standard web viewer will display it as sRGB; for print-accurate color keep a 16-bit TIFF.

When This Doesn't Work

AVIF is a delivery format, not an editing one. If you still need to adjust the shot — recover highlights, change white balance, push shadows — do it in Phocus or Lightroom on the original .3fr and export only when the look is locked. AVIF is also the wrong target if your destination can't read it: some older CMSs, email clients, and design tools still reject AVIF, in which case JPG is the safe universal choice and TIFF is the right archival/print master. And if a .3fr won't render at all, it may be from a camera newer than the converter's raw library recognizes; re-save it to DNG or TIFF in Phocus first, then convert that.

Frequently Asked Questions

Do I lose the 3FR's raw editing latitude when I convert to AVIF?

Yes — completely. A .3fr is an unprocessed negative: white balance, exposure, highlight recovery, and tone are all still adjustable in Phocus or Lightroom. To make an AVIF, the converter renders the raw first — demosaicing the sensor data and baking in the current white balance, exposure, and tone — then encodes that finished image with AV1. Once it is an AVIF the latitude is gone, exactly as it would be in a JPEG. Always keep the original 3FR as your master and convert a copy.

Does the medium-format resolution survive into the AVIF?

It can, but you usually don't want it to. A 3FR holds an enormous frame — roughly 39 MP up to 100-plus on current Hasselblad backs — and AVIF can store every pixel if you leave "Image resolution" on "Keep original". For web use that is overkill: no screen shows 50+ megapixels, so most people downscale to a display size (for example 2048px wide) and get a far smaller file with no visible loss. If your goal is to preserve full detail for print or archival instead, keep the 3FR and use a 16-bit TIFF rather than a web image.

How much smaller is an AVIF than a JPEG of the same photo?

Substantially. At matched visual quality, AVIF files are roughly 50% smaller than JPEG — an AVIF at quality 50 looks broadly comparable to a JPEG at quality 80 — and they hold detail better under aggressive compression. AVIF also supports 10- and 12-bit color, HDR, and alpha transparency, none of which baseline JPEG can carry. The trade-off is reach: JPEG opens literally everywhere, while AVIF needs a reasonably current browser or viewer.

Should I turn on the lossless option for a portfolio image?

Usually no. Lossless AVIF preserves the rendered pixels exactly but produces a much larger file — closer to a PNG than to a typical web image — which defeats the point of using AVIF for fast-loading delivery. Leave the lossless toggle (under "Show All Options") off and pick a high "Quality Preset" instead; for a portfolio or client gallery the visual difference is negligible while the file stays small. Reserve lossless for an exact archival copy of a render, where the original 3FR isn't a substitute.

What's the difference between converting in Phocus versus here?

Phocus is Hasselblad's own raw processor: it gives you full control over the render — exposure, white balance, lens corrections, color — before you export, and it can save to 3F/FFF, TIFF, or JPEG. This converter doesn't replace that editing step; it renders the 3FR with sensible defaults and encodes straight to AVIF, which is faster when you just need a web-ready copy and don't need to retouch. The honest workflow for serious work is to finish the look in Phocus, export, then convert that to AVIF for delivery. For a quick share, converting the 3FR directly here is fine.

How are my files handled during conversion?

In our testing, a 50-megapixel 3FR rendered at the "Very High" preset and downscaled to about 2048px wide produces a small AVIF — a few hundred kilobytes — because AVIF compresses photographs far more efficiently than JPEG. Your file is uploaded over an encrypted connection, rendered and encoded into AVIF on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public. The main practical limit is upload size and time, since 3FR captures can run well into the tens or hundreds of megabytes each, not your device.