Free FITS Converter Online
Convert FITS astronomical images to standard formats
Convert FITS Files
Daily Limit: /10 Credits
Register for free to get 600 credits monthly
Per File
100 MB
Total Queue
0 B / 500 MB
Upload Any File
Drag and drop files here or click the button below
PNG, JPG, WEBP, PDF, DOCX, MP4, MP3 and 300+ formats
Convert FITS to Other Formats
Convert your FITS files to 18 different formats
FITS Converter Features
Why choose our FITS converter
Astronomy standard
Astronomy standard
Scientific data
Scientific data
Multi-dimensional
Multi-dimensional
Metadata support
Metadata support
How to Convert FITS Files
Converting FITS files is quick and easy
Upload Your File
Drag and drop your file or click to browse. We support over 300 file formats. š” Pro Tip: You can drag and drop multiple files at once!
Choose Output Format
Select your desired output format from our comprehensive list of options.
Convert Instantly
Our powerful servers process your file in seconds with high quality results.
Download Result
Download your converted file immediately. Files are kept for 24 hours.
About FITS Format
FITS FITS is a image format. Astronomy format.
FITS Technical Details
- Full Name: Flexible Image Transport System
- Developer: NASA/NRAO
- Compression: Various
- Transparency: Not Supported
- Animation: Not Supported
- Lossless: Yes
Common FITS Use Cases
- Astronomy
- Scientific imaging
- Space research
- Astrophotography
Convert FITS to Any Format
With FreeFast, you can convert FITS files to 18 different formats including PNG, JPG, JPEG, WEBP, GIF, BMP, TIFF, TIF and 10 more. Each conversion maintains the highest possible quality.
Why Choose FreeFast as Your Best Free FITS Converter?
FreeFast is a premium, high-speed free online FITS converter designed for maximum efficiency, security, and simplicity. Unlike other conversion tools, we offer professional-grade features without any cost or limitations:
- Zero Cost & No Watermarks: Enjoy 100% free conversions without any watermarks, hidden subscription fees, or branding.
- Bulk/Batch Converter Support: Upload and convert multiple FITS files simultaneously. Save time with our high-speed parallel server processing.
- No Email Registration or Signup: Start converting files immediately. We do not require you to provide your email address or create an account.
- No Quality Loss: Our conversion engine preserves high-fidelity details, color accuracy, and layout formatting so that the output is identical to your original source.
- Completely Safe & Secure: All file transfers are protected by 256-bit SSL encryption. Your files are never tracked, accessed, or shared, and are deleted automatically from our servers.
FreeFast FITS Converter Specification Table
| Feature | Specification Details |
|---|---|
| Max Upload File Size | 1 GB (1,000 MB) per conversion |
| Privacy and Deletion Policy | Files automatically deleted after 24 hours |
| Data Security & Encryption | End-to-End SSL/TLS 256-bit encryption |
| Batch & Bulk Processing | Supported (unlimited parallel batch conversions) |
| Compatible Operating Systems | Windows, macOS, Linux, iOS, Android, ChromeOS |
| Account Registration | No account required (100% anonymous & secure) |
| Watermarks & Visual Edits | None. Output files are clean and unmodified |
End-to-End Privacy & File Safety
Your security is our absolute priority. Any FITS file you upload is processed fully inside our secure sandbox nodes. We use advanced HTTPS/SSL web layers to secure your uploads, meaning your files are fully encrypted in transit. We have a strict zero-file-ownership policy; all files are deleted instantly from memory and disk cache after 24 hours. We never sell, read, or catalog your private document or image data.
š” Dynamic Format Comparison Engine
When choosing between formats, understanding key attributes helps optimize quality and compatibility:
š Strengths of FITS
- Authoritative standard optimized for high compatibility.
- Exceptional balance between quality and file footprint.
- Supported out of the box by modern browsers, editors, and OS.
āļø Quality vs Compression
While converting files, our cloud processor handles scaling, color spaces, metadata preservation, and bitrates automatically. This guarantees that your FITS files maintain high fidelity without unwanted artifacting.
š FreeFast Converter - Developer Embed Widget
Are you a webmaster, developer, or digital creator? You can easily embed a high-class, beautiful link badge on your website to allow your users to convert files directly using our platform. Simply copy the clean HTML code below:
FITS Converter FAQ
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