CZI → AVIF · Windows

Convert CZI to AVIF

Batch convert CZI microscopy images to AVIF. No Java, no plugins, no command line: it is an ordinary Windows application.

Got a folder full of CZI files? reaConverter batch converts them to AVIF in minutes, not hours. Local processing means instant results, even with thousands of files. Built for volume, so an entire experiment converts with identical settings.

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CZI to AVIF
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CZIAVIF
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple CZI Files to AVIF?

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately.

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Install reaConverter

2. Load your CZI files

Open reaConverter and add your CZI files. You can load individual files, entire folders, or even nested subfolders.

Use drag-and-drop, folder browser, or right-click conversion from Explorer.

Load your CZI files into reaConverter

3. Select AVIF as output format

Pick AVIF as output format and choose the destination folder where you want to save new .avif files.

Select AVIF as output format

4. Start CZI to AVIF conversion

Click Convert to start the batch. reaConverter processes files quickly and shows you the status of each one.

Start Conversion

Once done, reaConverter shows a summary. Click 'Show converted files' to jump straight to your AVIF output.

Step by step

How It Works

reaConverter offers the fastest, simplest solution for converting your CZI files into AVIF in seconds - all files processed on your PC for maximum privacy and speed.

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Technical note

CZI to AVIF: what carries over and what does not

CZI is an N-dimensional acquisition rather than a picture. One file can hold several fluorescence channels, a stack of focal planes, a time series and a mosaic of stitched tiles, each recorded separately by the camera. AVIF is a flat image format, so those dimensions have to be resolved into ordinary pictures, and which result is the right one depends on the work: a merged colour composite suits a figure or a presentation, while separate greyscale planes are what quantification needs. A scientific camera records 16 bits per pixel, and the signal of interest often occupies a narrow slice of that range, while AVIF shows 8. Conversion applies a display mapping, so two acquisitions that look identical afterwards can hold very different underlying intensities. Treat the AVIF output as something to look at and publish rather than something to measure.

Deep Customization

Do more with your files

Converting CZI files for use in a workflow? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Conversion features
Image editing

User reviews

What people say after the first batch

Average User Rating:4.8
Last updated on August 20, 2026
Google Photos auto-saved my pics as AVIF files that won’t open anywhere. reaConverter rescued 3 years of memories AND kept the quality. Take that, ‘innovation’!
Derek Snyder
Derek Snyder
Satisfied Customer
Twitch thumbnails keep saving as AVIF and my editing software freaks out. reaConverter swaps them to JPEG instantly. Now I can actually post my ‘🔥HOT TAKES🔥’ without crying over file errors.
Amy Li
Amy Li
Content Creator
Finally an app that actually opens my weird files! Saves me from format frustration daily.
Kyle Brooks
Kyle Brooks
Happy User
This converter delivers exceptionally quick format conversions with reliable results every time.
Brian White
Brian White
Happy User
Security was our top concern when evaluating file conversion tools. reaConverter’s offline mode and role-based access controls let us lock it down for sensitive environments. No unexpected network calls or bloat — just clean, fast conversions. Even passed our pen-testing scans without a hitch.
Marcus White
Marcus White
Healthcare IT
This software just works! My old laptop can’t handle Photoshop, but reaConverter flies through conversions without breaking a sweat. Wi-Fi gone? Still strong!
Robert Williams
Robert Williams
Happy User

FAQ

CZI to AVIF Conversion

What are CZI files?

CZI (Carl Zeiss Image) is the native image format of ZEISS ZEN microscopy software. It stores multidimensional acquisitions with channels, z-stacks, time series and mosaic tiles, together with the full set of instrument and acquisition metadata.

What are AVIF files?

AVIF is a new image format launched at the end of 2020. AV1 Image File Format was developed by the Alliance for Open Media in collaboration with Netflix, Google and Cisco. This format was created to be an open-sourced and royalty-free image format with a super-compression efficiency. Multiple graphics compression tests show that the .avif format outperforms the JPEG, PNG and WebP image formats for its image quality to compressed file size ratio.

Can reaConverter convert CZI to AVIF?

Yes! reaConverter instantly converts .czi to .avif with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert CZI to AVIF online?

If you only need to convert a few CZI files to AVIF format, feel free to try our free online free online CZI to AVIF converter — perfect for small batches with no installation needed!

How can I turn CZI files into AVIF on my computer?

The best way to change CZIs to AVIFs on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from CZI to AVIF.

How can I automate CZI to AVIF files conversion?

reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.

Is there a way to convert CZI files to AVIF using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line czi to avif converter for batch processing.

What else can I do with reaConverter?

Convert vector filesChange image DPIChange format settingsCopy IPTC dataConvert DICOM files

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