3FR to AVIF Converter

3FR vs AVIF — Which File Do You Actually Need?

A .3fr is Hasselblad's camera raw: a 16-bit medium-format negative meant to be developed in Phocus, Lightroom, or Capture One. AVIF is the opposite end of the pipeline — AV1-coded image data in a HEIF container, built to deliver a finished photograph to a browser in as few bytes as possible. The short answer for most people: keep every 3FR as the master and convert a copy to AVIF when the destination is a web page, a portfolio, or anywhere page weight matters. Convert to AVIF only after the look is locked, because the render is one-way.

Side-by-side Comparison

When to Keep the 3FR

• The shot still needs work — exposure, white balance, highlight or shadow recovery all live in the raw data and disappear the moment it is rendered.
• You are archiving. A raw master plus its edit history survives format churn better than any delivery file.
• The output is print. Send a 16-bit TIFF to the lab, not a web codec.
• Your client or agency asked for the originals. 3FR is what the camera wrote; anything else is a derivative.

When to Convert to AVIF

• The image is going on a web page and you care about load time — this is AVIF's entire reason to exist.
• The photo has broad, smooth tones. Skies, studio backdrops and out-of-focus areas are exactly where JPEG bands and AVIF does not.
• You need transparency or HDR in a still. JPEG can carry neither; AVIF carries both.
• You are publishing many images at once and bandwidth is the constraint, not compatibility.

AVIF Against the Other Web Targets

How to Convert 3FR to AVIF

1. Upload Your 3FR File: Drag and drop the capture onto the page or click "Add Files". You can queue several raws and convert them under one set of settings.
2. Pick a Quality Preset: Under Image Compression, "Quality Preset" starts on "Very High (Recommended)" — the setting to leave alone for portfolio work, with Highest through Lowest available. Switch to "Specific file size" instead if you have to land under a hard cap, and type the number in bytes, kilobytes or megabytes.
3. Set the Resolution (Optional): Image resolution defaults to "Keep original", which preserves every medium-format pixel. For web use, pick a "Preset Resolutions" value or enter a width — no screen displays 100 megapixels.
4. Convert and Download: Click convert and save the AVIF. The file uploads over an encrypted connection, is rendered and encoded on our servers, and is deleted automatically after a few hours — no sign-up, no watermark.

Frequently Asked Questions

Is AVIF actually better than JPEG for a medium-format photograph?

For web delivery, yes, and the gap widens on exactly the images a Hasselblad produces. MDN puts lossy AVIF at around 50% smaller than JPEG for visually similar quality, and AVIF holds smooth gradients — skies, studio sweeps, defocused backgrounds — without the blocking and banding JPEG shows at the same weight. AVIF also carries 10- and 12-bit colour, HDR and alpha, none of which baseline JPEG can hold. JPEG's one remaining advantage is that literally everything opens it.

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

Completely, and that is inherent to any render rather than a limitation of this tool. A .3fr holds 16-bit sensor data with white balance, exposure and tone still open; producing an AVIF means demosaicing that data, baking in the current interpretation, and encoding the result with AV1. Afterwards you are editing a finished photograph, exactly as you would be with a JPEG. Keep the 3FR and convert a copy.

Does the medium-format resolution survive into the AVIF?

It can, but it usually should not. Leave Image resolution on "Keep original" and every pixel of a 39-to-100+ megapixel frame goes into the file, which defeats the point of choosing an efficient format. Web layouts rarely need more than a couple of thousand pixels on the long edge, so downscaling is where most of the size win actually comes from — the codec choice is the second-largest lever, not the first. For full detail, keep the raw or a TIFF.

How do I hit a specific file size instead of guessing at quality?

Switch Image Compression from "Quality Preset" to "Specific file size" and enter the ceiling — the unit dropdown takes bytes, kilobytes or megabytes — and the encoder aims at that target instead of a fixed quality level. This is the right control when a CMS, a client brief, or an email cap gives you a hard number. When there is no hard number, leave it on "Very High (Recommended)" and set the size with resolution instead; quality-targeted encoding gives more predictable results across a batch of different photographs.

Why is my AVIF slow to appear on the page even though it is small?

Because AVIF does not support progressive rendering: unlike a progressive JPEG, which paints a rough version early and refines it, an AVIF has to finish downloading before it draws anything. On a fast connection this is invisible; on a slow one a large AVIF can feel later than a JPEG of the same weight even though it transfers less data. The fix is size, not format — downscale the image and the problem disappears.

Can an AVIF carry HDR or wide-gamut colour from a Hasselblad capture?

The format can; this conversion does not aim for it. AVIF supports 10- and 12-bit coding, HDR transfer functions such as PQ and HLG, and wide-gamut spaces including Rec. 2020 and Display P3 — that capability is a real advantage over JPEG. What arrives here, though, is a raw file rendered with our defaults, so expect an ordinary standard-dynamic-range image rather than an HDR master. If HDR delivery is the goal, grade the shot in Phocus or Lightroom, export an HDR-tagged file, and encode from that.

Will the AVIF match the colour I see in Phocus?

Not necessarily. A 3FR carries a Hasselblad Natural Color Solution profile tied to the individual camera, and Phocus applies it as part of its own render. This converter develops the raw with its own defaults, so colours can drift — usually slightly, sometimes visibly under mixed lighting. AVIF is capable of carrying an ICC profile and wide-gamut data, but that does not undo a different render. For colour-critical work, finish the file in Phocus, export it, and convert the export.

What if the destination rejects AVIF?

Some older content management systems, email clients and design tools still refuse the format. When that happens, 3FR to JPG is the safe universal answer, and 3FR to WebP is the middle ground — about 30% smaller than JPEG with near-universal browser support. If you already have the AVIF and just need a compatible copy, AVIF to JPG re-encodes it without going back to the raw.