Spectra.Tacular Spectrum Viewer

View a mass spectrum

Load a spectrum by USI from a PROXI backend, then filter, deconvolute, and annotate fragment ions — all in-browser. Opening a share link restores a saved spectrum directly.

Universal Spectrum Identifier (USI) Backend

Or try an example

Share links

Use Copy Share Link (after loading) to generate a URL that encodes the current spectrum — opening it reloads the spectrum without re-fetching. The whole spectrum travels inside a single spectrl token in the URL fragment:

Part	Description
`#spectrl1.…`	A compact, URL-safe token holding the peak arrays (m/z, intensity, charge, ion mobility) and any MSn metadata (precursors, ms level, rt, polarity, …). Peaks are MS-Numpress compressed and the token carries a SHA-256 integrity hash.

The token lives in the fragment (after #), so it is never sent to the server — no request logs, no length caps. It is generated, not hand-written. A USI is entered in the box above and is not stored in the link.

View a mass spectrum

Process & annotate Steps run top-to-bottom on the loaded spectrum