FITS → AI · Windows

Convert FITS to AI

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

Got a folder full of FITS files? reaConverter batch converts them to AI in minutes, not hours. Local processing means instant results, even with thousands of files.

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FITS to AI
Online
FITSAI
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple FITS Images to AI?

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting FITS files in under two minutes. Apply image edits like resize, crop, or color adjustment while converting.

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Install reaConverter

2. Load your FITS files

Add your FITS files to reaConverter. Whether it's a handful or an entire archive, the batch engine processes them efficiently.

Browse for files, drag them in, or add entire folders at once. reaConverter queues everything automatically.

Load your FITS files into reaConverter

3. Select AI as output format

Pick AI as the output format. Set the destination folder and optionally configure resolution, quality, or file naming.

Select AI as output format

4. Start FITS to AI conversion

Start the conversion with one click. reaConverter handles everything and notifies you when it's done.

Start Conversion

When the batch finishes, your AI files are ready in the destination folder you chose earlier.

Step by step

How It Works

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

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Technical note

FITS to AI: what carries over and what does not

FITS is made of pixels and AI stores geometry, so the conversion traces the image into paths. Once traced, the artwork scales to any size without softening, which is the point of the exercise. It is a reconstruction rather than the original drawing: curves are fitted to the pixel edges, so the cleaner and sharper the source, the closer the paths follow what the designer intended. Lettering in the image is traced as shapes, not recognised as text. Every character arrives as an outline that can be scaled and edited like any other geometry, but not retyped, restyled or searched, and no font is attached to it. Titles and callouts on a scanned drawing usually have to be typed again in the AI if they need to stay editable.

Power Features

Do more with your images

Converting FITS images for use in a larger project? With reaConverter, you can convert, edit, and enhance your images in one streamlined process.

Our range of editing options includes such image processing actions as Resize, Rotate, Crop, Color Replace, Watermarks and more. Adjust actions include RGB, HLS, HSV, Brightness and Contrast. Auto-processing options are also available, such as auto-rotate and auto-crop.

Image editing tools
Image editing

User reviews

What people say after the first batch

Average User Rating:4.8
Last updated on August 20, 2026
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
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
Finally an app that actually opens my weird files! Saves me from format frustration daily.
Kyle Brooks
Kyle Brooks
Happy User
This converter delivers exceptionally quick format conversions with reliable results every time.
Brian White
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
Marcus White
Healthcare IT
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

FAQ

FITS to AI Conversion

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.

What are AI files?

AI (Adobe Illustrator Artwork) is a proprietary format used by Adobe Illustrator to create vector-based drawings. Though highly popular among graphic designer due to its ability to offer the possibility of creating and editing vector-based drawings. AI files can prove to be incompatible with most image viewers. For this reason, designers usually prefer to convert them to a more accessible format after finalizing the drawing.

Can reaConverter convert FITS to AI?

Yes! reaConverter instantly converts .fits to .ai 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.

What is reaConverter used for?

reaConverter is a software program used for converting images and other types of files from one format to another. It supports a wide range of file formats and allows users to convert multiple files at once, making it a valuable tool for graphic designers, photographers, and other professionals who work with digital images. reaConverter also includes features for resizing, cropping, and editing images, along with batch processing capabilities that help automate repetitive tasks.

Can I convert FITS to AI online?

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

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

The best way to change FITSs to AIs 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 FITS to AI.

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

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

What else can I do with reaConverter?

Convert vector filesChange image DPIConvert RAW photo formatsChange format settingsCopy IPTC data

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