tools

Web tools for JWST and little-red-dot research.

Live lrdzoo.zijianz.space Updated daily

LRD Zoo

Every published JWST little red dot, cross-matched across papers.

  • Check whether a source has already been published.
  • One merged catalogue with filters and CSV export.
  • New LRD papers flagged daily from arXiv.

Open LRD Zoo Source on GitHub

Live jwst.zijianz.space Refreshed every 6 hours

WebbRadar

What JWST is observing now, and what is coming up.

  • The live schedule and upcoming plan windows.
  • Observations and data releases that match your interests.

Open WebbRadar Source on GitHub

Live zijian-astro.github.io/astro-tools Runs in the browser

Astro Tools

Small browser tools for high-redshift JWST work.

ObjCard
JWST cutouts, spectra, X-ray coverage and redshifts for one position.
LensCalc
Einstein radius, magnifications and time delays.
GrismZ
Where emission lines land in NIRCam and NIRISS grism spectra.

Open Astro Tools Source on GitHub

In development COSMOS-3D survey

COSMOS-3D Slitless Inspector

Checks contamination in COSMOS-3D NIRCam slitless spectra and assigns each emission line to its true source.

Will be released after the paper is accepted (Fu, Zhang et al. 2026).