Convert LWI to FITS

Why upload sensitive LWI files to online converters? reaConverter processes everything locally — convert to FITS with zero cloud risk.

Manual LWI to FITS conversion wastes hours. reaConverter automates the process — just add files and click Convert. Everything happens offline on your computer — no uploads, no cloud risks.

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LWI to FITS
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How to Convert Multiple LWI Files to FITS?

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 LWI files

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

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

Load your LWI files into reaConverter

3. Select FITS as output format

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

Select FITS as output format

4. Start LWI to FITS conversion

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

Start Conversion

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

LWI to FITS Converter

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

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Do more with your files

Converting LWI 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
"reaConverter makes FITS conversion incredibly easy. We batch convert astronomical images to standard formats for presentations and analysis, all automated through the command-line. It’s fast, reliable, and handles large datasets without issues."
Laura N.
Laura N.
Astrophysics Research Assistant
"Essential for our astroimaging pipeline! reaConverter perfectly handles FITS files from our research telescope, preserving all WCS coordinates and photometric data during batch conversion to TIFF. Now we process 100+ deep-sky exposures nightly without losing critical metadata for our exoplanet studies!"
Joseph Wilson
Joseph Wilson
Satisfied Customer
"5/5⭐ Finally! Does what it promises - converts AND tweaks images without complicated menus. Perfect for quick jobs."
J. Mitchell
J. Mitchell
Satisfied Customer
"reaConverter is pure gold! Rock-solid performance with zero crashes. No internet needed—perfect for travel or low-connectivity work. The ultimate offline alternative to sketchy web converters. Plus, the desktop version keeps sensitive files secure since nothing ever gets uploaded to the cloud."
Malik T. Martin
Malik T. Martin
Satisfied Customer
"I was skeptical at first, but reaConverter exceeded my expectations. The interface is intuitive, and the advanced settings let me tweak outputs perfectly. Plus, the customer support is fantastic!"
Sarah Lane
Sarah Lane
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

LWI to FITS Conversion: FAQ

What are LWI files?

LWI is a bitmap image format associated with an image processing program called LightWorks, developed by LightWork Design. This is a British company specialized in offering image design solutions for a variety of business sectors, including product design, point-of-sale configurators and animated content. LWI images are considered rare and might be difficult to open outside the LightWorks program.

What are FITS files?

The FITS (Flexible Image Transport System) format is a standard format used particularly for storing, transferring and processing scientific images from fields such as astronomy. FITS was first launched as an open standard in the early 1980s and has gone through several subsequent upgrades. FITS files contain not just images, but also data related to photometry and spatial calibration, and information about the origin of the image. Similar formats include FIT and FTS.

Can reaConverter convert LWI to FITS?

Yes! reaConverter instantly converts .lwi to .fits 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 LWI to FITS online?

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

How can I turn LWI files into FITS on my computer?

The best way to change LWIs to FITSs 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 LWI to FITS.

How can I automate LWI to FITS 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 LWI files to FITS using the command prompt?

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

What else can I do with reaConverter?

Copy EXIF dataSet file dateConvert RAW formatsConvert CAD formatsSet picture bit depth

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