CR3 to AVIF Converter
FileFlip converts CR3 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 CR3 file to AVIF?#
- Drop your CR3 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 CR3 to AVIF lose quality?#
Yes, once. CR3 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 CR3 original, because every later re-save of the AVIF loses a little more.
Is it safe to convert CR3 files online?#
Yes, because nothing is uploaded. FileFlip converts CR3 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 CR3 to AVIF actually does to the file#
Converting CR3 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: CR3 → 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 CR3 file?#
A CR3 file holds raw sensor data in Canon Raw 3, a container built on the ISO base media file format that MP4 also uses, with the image itself coded by Canon's crx codec either losslessly or in the smaller C-RAW mode.
CR3 is what a current Canon EOS camera writes in raw, and the real decision in the menu is whether to shoot standard CR3 or the smaller C-RAW.
Convert CR3 to JPEG when a photo needs to leave your editor for sharing or printing, or to DNG when an older piece of software refuses to recognize the 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.
CR3 to AVIF questions people ask#
What is C-RAW and should I use it?
C-RAW is a compressed mode inside the CR3 format rather than a separate file type, and a C-RAW shot still comes off the card with a .CR3 extension. It cuts file size by roughly 40 percent using lossy wavelet compression, which is hard to see at normal viewing sizes but leaves slightly less room for heavy exposure recovery than standard CR3.
Why will my copy of Lightroom not open CR3 files?
CR3 arrived in 2018 with the EOS M50, and versions of Lightroom or Camera Raw older than that have no CR3 decoder, since Canon changed the container from CR2's TIFF layout to the ISO base media file format. Updating Lightroom or Camera Raw is the fix, and converting to DNG works for software that will never be updated.
Does converting CR3 to DNG lose anything?
Converting a CR3 file to DNG keeps the sensor data as it was captured, so image quality does not change. Canon-specific extras are what fall away, including the Dual Pixel autofocus data, which only Canon's Digital Photo Professional can use in the first place.
Why does Canon use CR3 instead of DNG?
Canon uses CR3 so it can put camera-specific data in the file, such as the Dual Pixel second image and its own lens correction information, without depending on a shared specification maintained by Adobe. Canon EOS cameras have no in-camera DNG option, so any DNG version of a CR3 is made afterwards on a computer.