Convert ST5 to AVIF

Stop converting ST5 files one by one. reaConverter processes entire folders to AVIF automatically — just drag, drop, and click Convert.

reaConverter transforms ST5 files to AVIF quickly and reliably. Drag in folders, set your options, click Convert, done. No cloud accounts, no file uploads, no complicated setup. Just install and start converting.

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ST5 to AVIF
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How to Convert Multiple ST5 Files to AVIF?

1. Download and Install reaConverter

Download reaConverter and install it in seconds. The setup is straightforward — no complex configuration, no extra software required.

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Install reaConverter

2. Load your ST5 files

Load your ST5 files into reaConverter. You can add individual files or point to folders, and the software will queue everything automatically.

Select ST5s from a folder or drag-and-drop them directly into the reaConverter window.

Load your ST5 files into reaConverter

3. Select AVIF as output format

Choose AVIF for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.

Select AVIF as output format

4. Start ST5 to AVIF conversion

Press the Convert button and reaConverter takes care of the rest. Processing time depends on file size and volume.

Start Conversion

After processing, find all your new .avif files in the output location. The log shows details for each conversion.

ST5 to AVIF Converter

reaConverter offers the fastest, simplest solution for converting your ST5 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 ST5 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 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
"We deployed reaConverter across our department to standardize file formats for our archives. The command-line support and automation features integrated perfectly into our systems. Stellar performance and zero crashes—it just works."
David R.
David R.
IT Solutions Architect
"So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!"
Kenneth D. Carter
Kenneth D. Carter
Satisfied Customer
"I run a small design agency, and reaConverter has saved me countless hours. The batch processing is lightning-fast, and the ability to convert hundreds of files into different formats at once is a game-changer. Highly recommend!"
Mark T.
Mark T.
Satisfied Customer
"Creating marketing materials for various platforms requires multiple file versions from single sources. reaConverter's workflow automation lets us generate PNG, JPEG, and SVG variants from AI and PSD files simultaneously. The color profile management ensures brand consistency across all outputs, and the processing speed allows for last-minute changes without delaying deadlines."
Rebecca Turner
Rebecca Turner
Marketing Agency CEO

ST5 to AVIF Conversion: FAQ

What are ST5 files?

The ST5 extension is attached to RAW images shot with the ST-X model of SBIG CCD cameras. The format is also known as Santa Barbara Instruments Astronomical Image and SBIG represents a brand of specialized imaging cameras, mostly used in astronomy, color photometry, medical imaging and a few other scientific and industrial sectors. As part of these niche uses, ST5 images are considered rare and are probably difficult to open using regular image viewers.

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 ST5 to AVIF?

Yes! reaConverter instantly converts .st5 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 ST5 to AVIF online?

If you only need to convert a few ST5 files to AVIF format, feel free to try our free online free online ST5 to AVIF converter — perfect for small batches with no installation needed!

How can I turn ST5 files into AVIF on my computer?

The best way to change ST5s 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 ST5 to AVIF.

How can I automate ST5 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 ST5 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 st5 to avif converter for batch processing.

What else can I do with reaConverter?

Convert RAW formatsConvert PDFAdd watermark on imageConvert CAD formatsSet picture bit depth

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