About eise.app - Image Stacker for Planets, Moon & Sun
100% browser-based - no uploads, no installs
eise.app is the first fully browser-based planetary image stacking tool for astrophotography. Everything runs locally on your machine using WebAssembly and Web Workers - your data never leaves your computer.
The name is an ode to Eise Eisinga, a Frisian amateur astronomer who built a planetarium in his living room. The project started from frustrations getting existing software running on ARM-based Macs - AutoStakkert4! didn't work in Wine, PSS had dependency issues, Lynkeos crashed continuously.
The stacking pipeline includes automatic frame ranking, per-frame cropping and centering, local alignment with de-warping, drizzle upscaling, and quality-weighted frame accumulation. The integrated post-processor offers wavelet sharpening, RGB alignment, and color correction. Learn how eise.app works or compare it to other stacking software.
You can also use the post-processor directly on any image - just open a PNG or TIFF for wavelet sharpening, RGB alignment, and other adjustments without stacking.
Technology
Built with Nuxt/Vue, OpenCV.js (WebAssembly), Web Workers for parallel processing, and FFmpeg.js for video decoding. All processing happens in your browser - works on any OS without installation.
Browser Requirements
eise.app uses WebGPU for fast GPU-accelerated processing. See browser requirements for minimum versions.
Alternative software
eise.app works well for quick astrophotography results without installing anything. For a detailed comparison with AutoStakkert!, Planetary System Stacker, Registax, and other tools, see our stacking software comparison.
Acknowledgments
This project draws inspiration from Planetary System Stacker by Rolf Hempel. The alignment point approach, local de-warping, and quality-weighted stacking concepts are based on PSS's implementation. Thank you Rolf for making PSS open source and documenting the algorithms.
Bugs or feature requests?
Head over to eise.app on GitHub for suggestions or bug reports.
Or send me feedback directly - I'd love to hear about your experience!
Happy Stacking,
Tijmen