Peak fitting
Paste any spectrum. Lattent subtracts a polynomial baseline, finds the peaks and fits them all at once, reporting position, height, FWHM, area and shape for each.
Free, no sign-up. The analysis runs in your browser; your data is not uploaded.
Questions
Which profile should I use?
Pseudo-Voigt is the safe default for most spectroscopies: it lets each peak be Gaussian, Lorentzian or between.
Peaks are missing
Lower the minimum prominence, or reduce smoothing for very sharp peaks.