ChemStation .D folders and OpenLab CDS 2 .dx files, old or new. No ChemStation, no instrument PC,
works on Windows 11, Mac and Linux. Overlay runs, pull chromatograms out of diode-array and MS data, and export clean CSV.
Reads HPLC UV/DAD (single wavelength and full spectra), CAD, ELSD, RID, GC-FID and GC/LC-MS (scan and SIM).
Tick a signal on the left to plot it.
Agilent ChemStation and OpenLab store each injection as a .D folder of binary files:
.ch for single detector channels (UV at one wavelength, FID, CAD, ELSD),
.uv for full diode-array spectra and .ms for mass spectra.
OpenLab CDS 2 packs the same kind of data into a single .dx file.
Without the vendor software on a licensed PC these files are hard to open, and older ChemStation versions do not run on Windows 11.
Nagura Lab decodes them in your browser.
No. The decoding runs inside this page on your computer. Nothing is sent to a server, so confidential or unpublished data stays with you.
Drop the .D folder, tick the signals you want and press Download CSV. The file opens directly in Excel, Origin, Python or R.
Yes. Open a DAD1.UV file, click the spectrum map at the time and wavelength you want, and add it as a chromatogram.
Yes. Only the newest ChemStation release is supported on Windows 11, but Nagura Lab runs in any modern browser, so old and new .D data opens on Windows 11, Mac and Linux without installing anything.
ChemStation .ch (versions 30, 130, 179, 181), .uv (31, 131 LC and OL) and .ms single-quadrupole files, including partial files from interrupted runs, and OpenLab CDS 2 .dx result files.
Every supported file version is tested value by value against the open-source rainbow parser. Always check results that matter against your vendor software.