Convert SYN to AVIF

The quick and simple way to convert your SYN into AVIF files is to use a quality piece of software, such as reaConverter.

reaConverter is offline conversion software that supports multiple file formats, including SYN to AVIF conversion, along with image editing capabilities.

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SYN to AVIF
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How to Convert Multiple SYN Files to AVIF?

1. Download and Install reaConverter

reaConverter is quick to download, install and launch. This standalone software is extremely efficient in managing a wide range of batch conversions. reaConverter is incredibly powerful and boasts an extensive variety of features.

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Install reaConverter

2. Load your SYN files

Start reaConverter and load all the .syn files you intend to convert into .avif. The software supports multiple SYN conversion and processes all files locally on your computer.

Select SYNs from a folder or by drag-and-dropping them directly into the reaConverter window.

Load your SYN files into reaConverter

3. Select AVIF as output format

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

Select AVIF as output format

4. Start SYN to AVIF conversion

Then simply press Convert button and your conversion will begin in no time!

Screenshot

Once the conversion is complete, you can find your AVIF files in the destination folder you selected.

SYN to AVIF Converter

reaConverter offers the fastest, simplest solution for converting your SYN 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 SYN 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

Average User Rating:
Last updated on May 24, 2025
"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
Content Creator
"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
Satisfied Customer
"Finally an app that actually opens my weird files! Saves me from format frustration daily."
⭐⭐⭐⭐⭐
Kyle Brooks
Happy User
"This converter delivers exceptionally quick format conversions with reliable results every time."
⭐⭐⭐⭐⭐
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
Healthcare IT
"Your solution was buried deeper in search results than it should be. After struggling with unclear alternatives, I found your guides — finally, instructions that made sense for a first-time user like me. Excellent work!"
⭐⭐⭐⭐⭐
Richard E. Miller
Satisfied Customer

SYN to AVIF Conversion: FAQ

What are SYN files?

SYN is an old and obsolete image format also known as Synthetic Universe. It is similar in size and features with the SYNU format, and might be equally difficult to open via regular image viewers. In case you found or were sent such a file, it's probably best to convert it to a more accessible format before trying to open it.

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 SYN to AVIF?

Yes! reaConverter instantly converts .syn 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 SYN to AVIF online?

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

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

The best way to change SYNs 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 SYN to AVIF.

How can I automate SYN 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 SYN 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 syn to avif converter for batch processing.

What else can I do with reaConverter?

Convert vector imagesConvert picture color spaceConvert Gerber imagesCrop pictureConvert CAD formats

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