Convert ST5 to FLIF

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

ST5 to FLIF conversion is faster with the right tool. reaConverter handles everything from a few files to thousands in one batch. Processes files consistently every time, with full control over quality and output settings.

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How to Convert Multiple ST5 Files to FLIF?

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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2. Load your ST5 files

Launch reaConverter and drop in your ST5 files. The software queues everything for batch processing with consistent settings.

Add files by dragging them in, browsing folders, or using the right-click menu from Windows Explorer.

Load your ST5 files into reaConverter

3. Select FLIF as output format

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

Select FLIF as output format

4. Start ST5 to FLIF conversion

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

Start Conversion

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

ST5 to FLIF Converter

reaConverter offers the fastest, simplest solution for converting your ST5 files into FLIF 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.

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User Reviews

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Last updated on January 25, 2026
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ST5 to FLIF 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 FLIF files?

FLIF (Free Lossless Image Format) is a royalty-free format launched at the end of 2015 as "work in progress" with the aim of offering a better alternative for storing lossless images than the existing PNG, WebP, BPG, JPEG2000 and JPEG XR. FLIF provides similar image quality as the other extensions, but in a file size than can be up to 74% smaller. The new format uses a form of the Adam7 algorithm for compressing images, offering progressive interlacing that allows users to obtain a reasonable encoding of an image even from a partial download.

Can reaConverter convert ST5 to FLIF?

Yes! reaConverter instantly converts .st5 to .flif 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 FLIF online?

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

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

The best way to change ST5s to FLIFs 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 FLIF.

How can I automate ST5 to FLIF 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 FLIF using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line st5 to flif converter for batch processing.

What else can I do with reaConverter?

Copy IPTC dataConvert GIS filesChange file dateConvert PDF filesAdd text on photos

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