Spectra stay on your computer
Files are read and processed in the browser and never uploaded, so unpublished and proprietary spectra are safe to open.
Read and report spectra without an Mnova licence
Signum opens processed spectra in any modern browser: JCAMP-DX, SPC, Thermo OMNIC, PerkinElmer SP, Bruker OPUS and text files from NMR, IR, Raman, UV-Vis and mass spectrometers. Pick peaks, integrate ¹H multiplets into a journal report, correct the baseline and overlay spectra, with nothing uploaded and no licence to renew.
MestReNova compared with Signum
| What you need | MestReNova | Signum |
|---|---|---|
| Price | Paid licence, 45-day trial; many universities have a campus licence | Free |
| Installation | Windows, macOS or Linux program | None, runs in the browser |
| Account needed | Licence activation | No |
| Raw FID: Fourier transform, phasing, apodisation | Yes | No |
| Processed JCAMP-DX spectra | Yes | Every compression, with line checks |
| 2D NMR contour plots | Yes | No |
| Peak picking | Yes | Yes |
| ¹H integrals, multiplicity and J | Yes | Yes |
| Journal-format ¹H report | Yes | Yes |
| Baseline correction and smoothing | Yes | Asymmetric least squares, polynomial, Savitzky–Golay |
| Overlay spectra | Yes | With normalisation |
| NMR prediction | NMRPredict, licensed | Separate NMR predictor |
| qNMR, reaction monitoring, structure verification | Yes | No |
| Export CSV and JCAMP-DX | Yes | Plus an Excel workbook |
| Files stay on your computer | Yes | Yes |
MestReNova is the tool to process an NMR experiment from the raw FID: Fourier transform, phasing, apodisation, 2D spectra, qNMR and structure verification. Signum starts once the spectrum is processed and exported, and covers reading, picking, integrating, reporting and comparing it, for free.
What Signum does differently
Reads what instruments write
JCAMP-DX in every compression (AFFN, SQZ, DIF, DUP and PAC) with the line checks verified, Galactic and Shimadzu SPC, Thermo OMNIC .spa and .spg, PerkinElmer .sp, Bruker OPUS and text columns. A damaged file is read up to the damage, and the damage is named.
¹H reports in the journal format
Drag across a multiplet to integrate it. It is called d, t, q, dd, dt or td only when the lines really show that pattern, J comes in Hz, and the report is written the way journals ask for it.
Overlay and compare
Open several spectra of the same kind at once, overlay them and normalise them to compare intensities.
Export for the next program
CSV, an Excel workbook with data, peak and metadata sheets, tab-separated text for Origin, Igor or R, and JCAMP-DX that records every processing step.
Common questions
Can Signum open Bruker, Varian or JEOL raw NMR data?
No. Signum opens processed spectra: export the processed spectrum as JCAMP-DX from the spectrometer software or from Mnova and open that file. Every JCAMP-DX compression is read.
Is my spectrum uploaded?
No. Signum reads and processes files in the browser; nothing is sent to a server.
How do I get an integral report for my paper?
Choose Integrate, drag across each multiplet and type the number of protons into one integral; the others follow. The Integrals tab shows the report with shifts, multiplicities, J in Hz and proton counts, ready to copy.