Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your FITS images to common formats like PNG, WEBP, JPEG, SVG, ICB, PNG64 and HDR. This tool works for both professionals and casual users. Convert your images to the format you want in seconds.
No supported conversions available yet.
No supported conversions available yet.
The Flexible Image Transport System (FITS) is the most standard digital file format in astronomy. Unlike consumer formats like JPEG which store pictures for human viewing, FITS stores raw photon counts and physical data for scientific analysis. A single file can contain multiple extensions, including N-dimensional data arrays (like 3D data cubes from radio telescopes) and ASCII tables of object lists. FITS is designed to be self-describing. Its 'Header' units are human-readable ASCII text blocks that define exactly how the binary data that follows should be interpreted.
A FITS file is composed of a sequence of Header Data Units (HDUs). The first HDU is the 'Primary' HDU which usually contains an image. Subsequent HDUs can contain extensions (images or tables). The header consists of 80-character 'card images' containing keyword=value pairs (e.g., `BITPIX=-32`, `NAXIS=2`). The data block follows, padded to 2880-byte blocks. FITS supports integer data (8, 16, 32, 64-bit) and floating-point data (32, 64-bit IEEE). This is crucial for astrophotography where pixel values often exceed the 0-255 range of standard screens.
Developed in 1981 by Wells, Greisen, and Harten to solve the problem of exchanging data between different radio astronomy observatories. It was officially endorsed by the International Astronomical Union (IAU) in 1982 and has been maintained with backward compatibility for over 40 years. A FITS file written in 1982 can still be read by modern software.
Experience lightning-fast image conversions with our advanced algorithms. No more waiting for your files to be uploaded before processing.
Enjoy unlimited image conversions without any hidden fees. Our service is completely free to use, with no limitations on file size or quantity.
Convert images files between over 20 formats. We support popular formats like PNG, JPG, WebP, HEIC and more.
Use Dynapik on any device with a modern browser. We support all major platforms such as Windows, macOS, Linux, Android, and iOS.
Ensure high fidelity in your conversions. Our professional-grade output is ideal for designers, marketers, and content creators.
Your files are safe with us. We focus on your privacy and security with advanced encryption and local processing.