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 WebGPU for fast GPU-accelerated processing, 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, explore the technical architecture, 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.
What users say
"Very good app — it helped me massively improve my image of the Moon."
— Santhiago, astrophotographer from Costa Rica
"Very satisfied with the result."
— Alexis, astrophotographer from France
"Happy this is easy to use."
— Astroyouda, astrophotographer from Indonesia
Quotes translated to English, collected via the in-app feedback form.
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.
Head-to-head with the most-searched competitors: AutoStakkert! vs Eise.app, Registax 6 vs Eise.app, PSS vs Eise.app.
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.
Community & feedback
Show me what you stacked
If you've made something with Eise.app I'd like to see it. With your permission I'll feature good ones on this page.
- Post on r/astrophotography and mention Eise.app in the workflow - I keep an eye out.
- Post to Instagram or X with #eiseapp.
- Open a GitHub Discussion at github.com/timing/eise.app/discussions.
- Or send it via the in-app feedback button. I read every message.
Bugs and feature requests
Hit a bug, want a feature, or something isn't working the way you expected? Please tell me - especially the niche stuff. "Doesn't work with my old QHY camera", "wavelets need one more slider", "add FITS support", "make it run on my Chromebook" - all useful, all read.
Community gallery
A gallery of user-submitted stacks is being built. Send yours in and it might be featured here in the next update.
Happy stacking,
Tijmen