3FR to WebM Converter

3FR to WebM Converter

Hasselblad's .3fr is a medium-format raw photograph; WebM is Google's open, royalty-free web video container. So this is not a normal format swap — the converter develops the raw capture into a finished frame, holds that single frame on screen for a duration you choose, and encodes the result as a VP9 WebM clip. The output is a silent, motionless video: a slate, a title card, a product hero loop, or a still that is already in the codec your web-video timeline expects. If all you want is a picture to view, print, or post, convert 3FR to JPG instead and keep the .3fr as your master negative.

3FR Format at a Glance

WebM Format at a Glance

How to Convert 3FR to WebM

1. Upload Your 3FR File: Drag and drop the .3fr onto the page or click "From my Computer" to browse. Medium-format raws are large, so the wait you notice is the upload itself, not the encode.
2. Set the Image Duration: Under "Image Duration", pick how long the still stays on screen. The default is 5 seconds; the dropdown runs from a single 1/60-second frame up to 10 seconds.
3. Choose Quality Preset, Codec, and Background Color: Leave "Quality Preset" on "Very High (Recommended)", keep the video codec on VP9 (switch to VP8 for older players), and set "Background Color" — white by default — which fills the letterbox bars when the photo's aspect ratio does not match the output frame.
4. Convert and Download: Click "Convert" and save the .webm. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours. No sign-up, no watermark.

What This Conversion Actually Does to Your Photo

The server always re-encodes; nothing is copied through untouched. Three consequences are worth knowing before you convert:

• The raw is developed, then thrown away. VP9 stores 8-bit 4:2:0 video, so Hasselblad's high-bit-depth linear sensor data is demosaiced, tone-mapped and quantised down. A WebM is a delivery file, never an archival one — keep the .3fr.
• There is no audio track. A still image has nothing to encode, so the audio codec control is hidden on this page and the output is silent by design. Add a soundtrack later in an editor if you need one.
• Colour is subsampled. Fine red and blue detail — fabric threads, coloured type, jewellery highlights — softens under 4:2:0 chroma subsampling in a way it never does in the raw. Raising the duration does not help; raising the resolution or quality preset does.

If you have several .3fr frames, "Merge strategy" decides the outcome: "Merge images" (the default) strings them into one clip with each photo held for the duration you picked, while "Video per image" returns a separate WebM per file. That makes the merge mode a quick way to build a contact-sheet slideshow from a shoot.

Frequently Asked Questions

Does the WebM keep the 16-bit colour data in my Hasselblad raw?

No. Hasselblad markets its medium-format captures as 16-bit colour with around 15 stops of dynamic range, and that latitude only exists while the file is still raw. VP9 in a standard WebM profile delivers 8-bit 4:2:0 video, so the converter has to demosaic and tone-map the sensor data into a fixed, display-referred frame first. Do your exposure and colour work in Phocus, Camera Raw or Capture One while the file is still .3fr, then convert. Treat the WebM as an export, and never as a replacement for the original.

Why is my WebM video silent?

Because the source is a photograph. There is no audio to carry across, so the audio codec control is hidden on image-to-video pages and the file is written video-only. That is the expected result, not a failed conversion — a .webm with a single video track plays correctly in Chrome, Firefox, Edge and Safari 16+. If a downstream tool insists on an audio track, add a silent one when you edit the clip.

How long can the still be held on screen?

The "Image Duration" dropdown covers a single 1/60-second frame at the short end through 10 seconds at the long end, with 5 seconds as the default. Short values are useful when you are assembling frames into a stop-motion or time-lapse style sequence with "Merge images"; long values suit a slate or a title card. If you need a duration longer than 10 seconds, produce the clip here and loop or extend it in an editor.

Should I pick VP9 or VP8?

VP9 is the default and the right answer almost always: it is the newer codec, it produces a noticeably smaller file at the same quality, and it plays natively in Chrome 25+, Firefox 28+, Edge 79+, Safari 16+ on macOS and iOS Safari 17.4+. VP8 exists for players that predate VP9 — some older embedded devices, set-top boxes, and legacy Android builds. AV1 is also offered in the codec list; it compresses better still but encodes far more slowly and needs newer decoders, which is overkill for a motionless frame.

Why is my file large for a video that never moves?

Because the very first frame has to encode all the detail of a medium-format capture, and the WebM keeps that frame's resolution for its whole duration. A static picture compresses efficiently after the keyframe — the subsequent frames are nearly free — so length is rarely the culprit. If the file is bigger than you want, scale the output down under "Video resolution" with "Preset Resolutions" or "Width (Keep aspect ratio)" rather than shortening the clip. Dropping a 100 MP frame to 1080p is the single biggest saving available.

Can I use this to turn a set of 3FR photos into a slideshow?

Yes. Upload the frames together and leave "Merge strategy" on "Merge images", the default for image-to-video conversions. Every photo is held for the duration you set in "Image Duration", and they are written into one WebM in upload order. Choose "Video per image" instead if you want one separate clip per photo. There are no transitions or captions in this pipeline — for cross-fades and titles you need an editor.

What does the Background Color option change?

Only the letterbox bars. When your photo's aspect ratio does not match the output frame — a 4:3 medium-format capture placed in a 16:9 video, for example — the encoder pads the empty edges, and Background Color decides what colour that padding is. White is the default; black gives the classic letterbox look for players and dark pages, and a brand colour works when the clip sits on a styled page. It does not tint or recolour the photograph itself.

Which is the better choice for a Hasselblad still — WebM or MP4?

WebM if the clip is going straight onto a web page inside a <video> element: it is royalty-free, it is supported by roughly 96% of browser usage, and VP9 is efficient. MP4 with H.264 if the clip has to be dropped into a video editor, sent through a client-review platform, played on a smart TV, or handed to someone on an older device — H.264 is still the most universally decodable video codec. If that is your situation, use 3FR to MP4 instead. For everything else the .3fr can become, see the 3FR converter hub.