One file in, the format you need out
JCAMP-DX, Galactic and Shimadzu SPC, Thermo OMNIC, PerkinElmer SP, Bruker OPUS, CSV, TSV and XY in; CSV, Excel, TSV, JCAMP-DX or JSON out, in one step, with a preview of the spectrum and its metadata.
Open and convert spectra without installing Spectragryph
Spectragryph is a Windows program, and its free key covers academic and non-commercial use only. The spectrum file converter turns JCAMP-DX, SPC, Thermo OMNIC, PerkinElmer SP, Bruker OPUS and text files into CSV, Excel, TSV, JCAMP-DX or JSON in any modern browser, and Signum overlays spectra, picks peaks and corrects baselines.
Spectragryph compared with Spectrum file converter and Signum
| What you need | Spectragryph | Spectrum file converter and Signum |
|---|---|---|
| Price | Free key for academic and non-commercial use, paid otherwise | Free |
| Installation | Windows program | None, runs in the browser |
| macOS, Linux, Chromebook | No | Yes |
| JCAMP-DX, every compression | Yes | Yes |
| Galactic and Shimadzu SPC | Yes | Yes |
| Thermo OMNIC .spa and .spg | Yes | Yes |
| PerkinElmer .sp | Yes | Yes |
| Bruker OPUS | Yes | Yes |
| JASCO files | Yes | Not yet |
| Export CSV, TSV and JCAMP-DX | Yes | Plus Excel and JSON |
| Convert many files in one go | Yes | One file at a time |
| Overlay and normalise | Yes | In Signum |
| Peak picking | Yes | In Signum |
| Baseline correction and smoothing | Yes | In Signum |
| Fluorescence excitation–emission maps | Yes | No |
| Search a spectral library | Yes | No |
| Files stay on your computer | Yes | Yes |
Spectragryph reads far more instrument formats, converts whole folders at once and adds fluorescence maps and library search. The converter and Signum cover the everyday path from an instrument file to a spreadsheet or a figure, on any computer and without a key.
What Spectrum file converter does differently
Every JCAMP-DX compression
AFFN, SQZ, DIF, DUP and PAC are decoded and the DIF line checks verified. A multi-subfile SPC or an NTUPLES file lists every spectrum it holds.
Excel in any language
The workbook stores numbers as numbers, so it opens correctly with any regional setting. For CSV, one switch writes decimal commas and semicolons for a European Excel.
Never uploaded
The conversion runs in the browser, so proprietary and unpublished spectra are safe to convert.
What Signum does differently
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.
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
How do I convert an SPC file to CSV or Excel?
Open the spectrum file converter, drop the .spc file on it, pick CSV or Excel and download. A multi-subfile SPC lists every spectrum it holds.
Does it read OMNIC .spa or Bruker OPUS files?
Both. An OMNIC .spa spectrum or a whole .spg group opens with each spectrum's title and collection time, and an OPUS file opens on its absorbance, transmittance or reflectance spectrum, with every other block it holds after it, whatever its numbered extension.
Can I overlay several spectra?
Yes, in Signum: open several spectra of the same kind at once, and they are overlaid and can be normalised to compare intensities.