Question 1

What is a .FITS file?

Accepted Answer

A .FITS file is a Flexible Image Transport System format used in the images category. You can view the full technical details on this page, or convert it to another format using the tool above.

Question 2

How do I convert a .FITS file online for free?

Accepted Answer

Select a target format from the list on this page (e.g. A64, APNG, ASF), configure any settings, then click Start Conversion. No software to install, no account required for files up to 25 MB.

Question 3

What formats can I convert .FITS to?

Accepted Answer

You can convert .FITS to 29 formats including A64, APNG, ASF and 26 more.

Question 4

Is the .FITS converter free?

Accepted Answer

Yes, completely free for files up to 25 MB, 5 conversions a day. No account or credit card needed. Bigger files are coming with the Pro plan.

Question 5

Is my .FITS file kept private?

Accepted Answer

Yes. Files are uploaded over an encrypted connection and permanently deleted from our servers within 24 hours. We never read, store, or share your files.

Question 6

Can I convert multiple .FITS files at once?

Accepted Answer

On the free tier files are converted one at a time. Batch conversion (up to 10 files) is planned for the Pro tier.

FITS File Converter — Convert .FITS to A64, APNG, ASF & More

Flexible Image Transport System

Convert FITS to (29 formats)

Select a Target Format

Popular FITS Conversions

What is a .FITS file?

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