Convert EFX to AVIF

Need to convert hundreds of EFX files to AVIF? reaConverter does it in one click. No file limits, no watermarks, no internet required.

Need to convert EFX to AVIF? reaConverter handles batch conversion with ease, processing hundreds of files at once while preserving quality. Your files never leave your machine. No third-party servers, no privacy concerns.

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EFX to AVIF
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How to Convert Multiple EFX 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 EFX files

Launch reaConverter and load the EFX files you want to convert. Add a few files or thousands, batch processing handles them all.

Drag-and-drop EFXs directly into reaConverter or use the folder browser to load entire directories.

Load your EFX files into reaConverter

3. Select AVIF as output format

Set AVIF as output format and select where to save your converted files. Customize quality settings if needed.

Select AVIF as output format

4. Start EFX to AVIF conversion

Press Convert to begin processing. You can watch the progress or minimize and let it run in the background.

Start Conversion

Your converted AVIF files will appear in the destination folder as soon as processing completes.

EFX to AVIF Converter

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

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Do more with your files

Converting EFX 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.

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User Reviews

Average User Rating:
Last updated on January 25, 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
"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
"Rare software that actually does it all! Converts anything, beautiful interface, and never lets me down. A must-have!"
Henry R.
Henry R.
Happy User
"For cross-platform compatibility, JPEG remains the gold standard. reaConverter’s precision conversions ensure perfect results every time, whether for presentations, websites, or client deliverables."
Paul Baker
Paul Baker
Happy User
"An excellent program! I use it regularly in my work - it supports nearly every file format imaginable. The interface is intuitive and runs flawlessly every time."
Roger Cook
Roger Cook
Happy User

EFX to AVIF Conversion: FAQ

What are EFX files?

EFX is an image format associated with some models of Everex fax machines. The file most likely contains the digital copy of a fax document that has been sent or received. Everex was a large manufacturer of tape drives, disk drives, fax modems and other IT products in the late 1980s. After a period of financial problems, the company was relaunched in 2008 after being acquired by New Market Technology. At the moment it manufactures desktop computers and notebooks. Everex fax machines have long been discontinued, so opening an EFX file might pose difficulties.

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 EFX to AVIF?

Yes! reaConverter instantly converts .efx 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 EFX to AVIF online?

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

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

The best way to change EFXs 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 EFX to AVIF.

How can I automate EFX 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 EFX 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 efx to avif converter for batch processing.

What else can I do with reaConverter?

Change format settingsChange DPISet manual file dateConvert vector filesChange color space

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