Convert Renishaw WiRE .wdf Raman files to CSV (Beta)

Export Renishaw Raman spectra, series and maps from .wdf files to CSV or Excel without WiRE.

Opens: OPUS (.0, .1 …), SPA, SPG, SPC, WDF, SP, JWS
Saves: CSV, XLSX, JCAMP-DX

Convert

Spectrum files

Choose files… or drop them here

up to 200 MB each, 200 files max

Add more files

Bruker OPUS (.0, .1, .2 …), Thermo OMNIC (.spa, .spg), GRAMS/Galactic (.spc), Renishaw WiRE (.wdf), PerkinElmer (.sp) or JASCO (.jws). Several files or a .zip can be combined into one table.

Options

Which spectrum

OPUS files usually hold several blocks (absorbance, sample and background single channel, interferograms). Groups and maps always export every spectrum.

Number format

Pick the comma version if your Excel uses a decimal comma (most of Europe).

More options

Table layout for several spectra

Columns: one x column and one column per spectrum. Rows: one spectrum per row (best for maps and chemometrics). Auto uses rows above 100 spectra.

X axis

Convert between wavenumber and wavelength (not possible for Raman shift or time axes).

Y axis

Convert transmittance to absorbance (A = −log₁₀T) or back. Other spectrum types are left unchanged.

Your files are deleted after processing.

Renishaw's WiRE software saves Raman measurements as .wdf files, from a single spectrum up to a map with tens of thousands of spectra. Without WiRE you can't open them. This page reads the .wdf directly and writes the spectra as CSV, together with the stage positions, so you can continue in Python, R, MATLAB, Origin or Excel.

How to convert WDF to CSV

Upload the .wdf file (up to 512 MB each), or several files at once.
For maps and long series, choose the layout under More options, or leave it on automatic: one spectrum per row above 100 spectra, one column per spectrum below that.
Download the CSV. The x axis is Raman shift (cm-1).

What each measurement type gives

WiRE measurement	CSV
Single spectrum or extended scan	Raman shift and intensity columns
Depth or time series	one column per spectrum, named by position and time, e.g. `Z=-9.5 um, Time=1.047062s`
Map (row layout)	one row per spectrum: its name, then the X, Y (and Z) stage positions, then one column per Raman shift value

The row layout suits chemometrics and mapping scripts: each row is a sample, the position columns tell you where it was measured, and the remaining columns form the data matrix. To rebuild a map image, pivot on the X and Y columns.

Metadata

The preview and the Excel workbook's metadata sheet list what WiRE stored about the measurement: title, WiRE version, measurement and scan type, laser wavelength, start time, number of spectra, points per spectrum, accumulations and spectral range. Check the laser wavelength there before converting Raman shift to absolute wavelength elsewhere; the converter itself doesn't turn a Raman shift axis into wavelength.

Accuracy

Files from WiRE 4.1 to 4.4 were compared with an independent open-source WDF reader (all spectra identical) and with WiRE's own text exports, which match to their six decimals.

Large maps

The CSV is written in chunks, so maps with many thousands of spectra convert in full.
The preview charts up to ten spectra plus the mean of all of them.
JCAMP-DX output is skipped above 2,000 spectra, and the Excel workbook above six million cells; the result says when that happens, and the CSV always has everything.

Several .wdf files can be combined into one table. For the other formats this converter reads, see the Spectrum File Converter.

More about what this tool reads and writes: Spectrum File Converter (OPUS, OMNIC, SPC, WDF, SP, JWS).