Convert SUN to AVIF

SUN to AVIF converter that respects your privacy. No cloud uploads, no file size limits — just fast offline batch processing.

Batch SUN to AVIF conversion doesn't have to be complicated. reaConverter processes entire folders with consistent quality settings. Works offline with no internet required — convert anywhere, anytime.

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SUN to AVIF
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How to Convert Multiple SUN Files to AVIF?

1. Download and Install reaConverter

First, grab reaConverter from the download button below. Installation is fast, and the software runs offline — no account or signup needed.

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Install reaConverter

2. Load your SUN files

Open reaConverter and import your .sun files. No file limits, no slowdowns. Add as many as you need.

Drag files into the window, use the Add Files button, or select entire folders.

Load your SUN files into reaConverter

3. Select AVIF as output format

Select AVIF as target format and pick where to save results. You can keep default settings or fine-tune the output.

Select AVIF as output format

4. Start SUN to AVIF conversion

Hit Convert to process your files. The log window shows progress, timing, and status for every file.

Start Conversion

Conversion complete? Your AVIF files are saved to the destination folder, ready to use.

SUN to AVIF Converter

reaConverter offers the fastest, simplest solution for converting your SUN 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 SUN 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
"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
"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
"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
"For agencies handling confidential data, reaConverter eliminates cloud-upload risks while delivering unmatched conversion reliability. Our team uses it both in-office and remotely with identical results."
Jamal Bailey
Jamal Bailey
Satisfied Customer
"Our volunteer team uses reaConverter to prepare images for fundraising campaigns. The learning curve was minimal, and the results are professional-grade. The customer support team even helped us customize a workflow — fantastic service!"
Jason P. Bailey
Jason P. Bailey
Non-Profit Coordinator
"An ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!"
Logan B.
Logan B.
Satisfied Customer

SUN to AVIF Conversion: FAQ

What are SUN files?

The SUN format is part of a group called Sun Raster Images, also including RAST, RAS, SR and SCR. All were designed by Sun Microsystems for its UNIX workstations and might not be compatible with other platforms. SUN images can be black-and-white or colored, including several types of color depths.

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 SUN to AVIF?

Yes! reaConverter instantly converts .sun 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 SUN to AVIF online?

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

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

The best way to change SUNs 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 SUN to AVIF.

How can I automate SUN 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 SUN 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 sun to avif converter for batch processing.

What else can I do with reaConverter?

Set file dateConvert DICOM imagesPicture resizerCopy EXIF dataConvert CAD formats

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