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USI Visualizer

Render an MS/MS spectrum — or a mirror plot of two — from a Universal Spectrum Identifier. Peaks are fetched once from the GNPS2 metabolomics-USI resolver and drawn in your browser — instant and zoomable, no server-side image rendering. Give a second USI to mirror them and get a client-side spectral cosine.

1 · Spectra

Top (usi1)

Bottom (usi2) — optional, for mirror

Peaks come from metabolomics-usi.gnps2.org over CORS (works on the deployed site).

No network here? Paste peaks / advanced

Resolver host

— or paste peaks (bypasses the network) —

Top peaks — one m/z intensity per line (or an MGF block) Bottom peaks (optional)

2 · Spectrum

Normalize to base peak (%) Label top peaks

3 · Peaks

Data via the GNPS2 metabolomics-USI resolver /json/ endpoint. Rendering by Plotly; cosine is a client-side greedy match within the m/z tolerance on sqrt-weighted intensities.