AstroSpike — Add Diffraction Spikes to Astrophotography Images

AstroSpike is a free web tool for astrophotographers. Upload an astrophoto and AstroSpike detects the stars automatically, then renders realistic diffraction spikes on them — the classic four-point Newtonian look, refractor-style crosses, and other presets — before exporting the finished image as JPEG or PNG.

Features

Automatic star detection
Diffraction spike presets with adjustable length, angle, and intensity
High-quality JPEG and PNG export
100% client-side processing — your image never leaves your browser

Who is it for?

Astrophotographers who shot with a refractor or other spike-free optics and want to add the classic diffraction-spike aesthetic to their bright stars — without installing software or uploading their image to a server.

DB Astro Suite | GitHub Repository