SVG to FITS Converter
Processing entirely on your device — large files may take a moment.
Convert FITS frames to PNG or JPG to preview telescope data, or pack them into a ZIP for sharing. If your files are still in SVG format, this page is the shortcut: SVG (Scalable Vector Graphics) stores drawings as mathematical paths instead of pixels, so it stays perfectly sharp at any zoom level while keeping tiny file sizes. Only browsers and design tools render it natively.
iLoveConverter processes everything locally on your computer, which makes it private and fast: no upload wait, no server storage, no limits. Add as many files as you like — batch conversion is built in.
How SVG compares to FITS
| SVG | FITS | |
|---|---|---|
| Compression | Lossless (gzip-able text) | None (optionally Rice/GZIP) |
| Transparency | Native (it is just geometry) | Not supported |
| Animation | SMIL, CSS, JS | Not supported |
| Metadata | Arbitrary XML metadata | Rich text header (WCS) |
| Best for | Icons, logos, charts, illustration | Telescope frames, science data |
How to convert SVG to FITS
- 1
Select your files
Drag & drop your SVG files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to FITS". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted FITS file individually, or grab everything at once as a ZIP archive.
About the SVG format
SVG (Scalable Vector Graphics) is the W3C's XML-based vector format. Instead of pixels, it stores shapes — paths, circles, polygons, text — as math, which means an SVG logo is a few kilobytes and stays perfectly sharp from a 16-pixel favicon to a billboard. Browsers render it natively, CSS can restyle it, and it scales with zero quality decisions to make.
It is the wrong tool for photographs — vectorizing a photo produces enormous, slow files. It is also worth remembering that SVG is executable XML: files from untrusted sources can carry scripts, so sites typically sanitize uploads. For icons, logos, charts and flat illustration, nothing else comes close.
+Strengths
- ✓Infinitely scalable with zero quality loss
- ✓Tiny files for icons and geometric art
- ✓Styleable and animatable with CSS and JavaScript
- ✓Text stays selectable and searchable
!Limitations
- −Unsuitable for photographs — files explode in size
- −Complex hand-drawn illustrations can grow heavy too
- −Untrusted SVG can embed scripts and needs sanitizing
About the FITS format
FITS (Flexible Image Transport System) has carried professional astronomy data since 1981: every file opens with a plain-text header that records telescope, instrument, exposure, filters and world coordinates, followed by raw pixel arrays — often 16-bit or float, sometimes data cubes.
Values can be negative or far above display range, so FITS never looks right in a photo viewer. Converting to PNG applies a simple scaling pass that reveals the nebula or galaxy in the numbers — good for previews, while science pipelines keep the original.
+Strengths
- ✓Self-documenting science headers
- ✓High bit depth (16/32-bit, float)
- ✓The standard of every observatory
!Limitations
- −Not display-ready
- −Files are large and uncompressed
Why convert SVG to FITS?
Converting makes sense where the strengths of FITS meet what SVG cannot give you. Self-documenting science headers Meanwhile Unsuitable for photographs — files explode in size One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this SVG to FITS converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Will I lose quality converting SVG to FITS?
No — FITS is a lossless format, so every pixel of the converted image matches your original SVG file. You can also adjust the quality/size balance before converting when the target format supports compression.
Will transparent areas survive the conversion to FITS?
Transparency is kept whenever FITS actually supports an alpha channel. If the target format has none (like JPG), transparent areas are flattened onto a white background — that is a property of the format, not of this tool.
What happens to EXIF data and other metadata?
Conversions here re-encode the image, and re-encoding generally does not carry the original metadata over. If the EXIF data of your SVG files matters (camera model, GPS, timestamps), keep the original file as the master and treat the converted copy as the shareable version.