Convert PEN to FITS

Fast PEN to FITS conversion for RAW photos. reaConverter processes camera files offline with professional output settings.

Manual PEN 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. Studios rely on it for consistent color across thousands of photos.

PENFITS

How to Convert Multiple PEN Images to FITS?

1. Download and Install reaConverter

Download reaConverter and install it in seconds. The setup is straightforward — no complex configuration, no extra software required. reaConverter also includes editing tools: resize, crop, rotate, and more.

2. Load your PEN files

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

Drop your PEN files into the window or use File menu to browse and select folders.

Load your PEN files into reaConverter

3. Select FITS as output format

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

Select FITS as output format

4. Start PEN to FITS conversion

Hit Convert and let reaConverter do the work. The progress window shows status for each file in real time.

Start Conversion

After conversion, find your FITS files in the output folder. Click 'Show converted files' to open it directly.

PEN to FITS Converter

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

Do more with your images

Converting PEN 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

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
"The step-by-step video makes conversion foolproof. I'd recommend this to my grandma - it's that well-explained!"
DeShawn M. Thompson
DeShawn M. Thompson
Happy User
"I'm really impressed with this software - it converts files between formats incredibly fast!"
Lin Zhang
Lin Zhang
Happy User
"I firmly believe working with JPEG — the universal format supported by all devices and apps—is the wisest choice. reaConverter handles these conversions flawlessly."
Ava Thomas
Ava Thomas
Happy User
"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

PEN to FITS Conversion: FAQ

Can reaConverter convert PEN to FITS?

Yes! reaConverter instantly converts .pen 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.

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 PEN to FITS online?

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

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

The best way to change PENs 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 PEN to FITS.

How can I automate PEN 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 PEN 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 pen to fits converter for batch processing.

What else can I do with reaConverter?

Convert CAD formatsSet picture bit depthConvert RAW formatsConvert vector imagesChange image color space

Find out more

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