Convert FITS to ASDF Free — Online & Instant

Convert FITS to ASDF — Free Online

Fast, secure, no software needed.

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✅ Free • ⚡ Instant • 🔒 Secure • 💻 No install

How to Convert FITS to ASDF

Converting .fits files to .asdf is fast and simple with OpenAnyFile. FITS is a science format: FITS stores astronomical image and table data. ASDF is a data format: ASDF Astronomy Data

Upload your .fits file to OpenAnyFile
Select ASDF (.asdf) as the target format
Click "Convert" and wait for processing
Download your converted .asdf file

Why Convert FITS to ASDF?

There are several reasons to convert from .fits to .asdf:

Compatibility: .asdf may be more widely supported by software and devices
File size: Converting between formats can reduce file size for easier sharing
Editing: ASDF may offer better editing capabilities for your workflow
Sharing: Recipients may prefer .asdf files for their daily use

About FITS Format

FITS stores astronomical image and table data. Category: Science. Extension: .fits. Created by: NASA/IAU.

About ASDF Format

ASDF Astronomy Data Category: Data. Extension: .asdf. Created by: STScI.

Frequently Asked Questions

How do I convert .fits to .asdf?

Upload your .fits file to OpenAnyFile, select ASDF as the target, and download the converted file.

Is FITS to ASDF conversion free?

OpenAnyFile offers free file analysis. Conversion may require a one-time payment depending on the file.

Will I lose quality converting .fits to .asdf?

OpenAnyFile preserves maximum quality during conversion. Some format-specific features may not transfer between different file types.

Can I convert .asdf back to .fits?

Yes, you can convert .asdf to .fits using OpenAnyFile as well.