SpectralBench

The Free Bruker OPUS Alternative

Read OPUS files anywhere — no Bruker license, no Windows workstation, no vendor lock-in

Features

  • Reads Bruker OPUS files (.0-.9) natively — no conversion needed
  • Works on any platform — Windows, Mac, Linux, iPad, Chromebook
  • Zero installation — open your browser and start analyzing
  • 50,000+ reference spectra from ROD, NIST, and curated open databases
  • AI-powered spectral interpretation with Claude
  • Advanced baseline correction (ALS, polynomial, SNIP, rubberband)
  • Levenberg-Marquardt curve fitting with Gaussian, Lorentzian, and pseudo-Voigt models
  • PCA / chemometrics with interactive variance and score plots
  • Automated peak identification for FTIR, Raman, and UV-Vis
  • Export to CSV, JCAMP-DX, SPC, JSON, MATLAB, SVG, PNG, PDF
  • Shareable spectrum links and community reference library
  • 100% client-side processing — your data never leaves your computer

Supported Formats

Bruker OPUS (.0-.9)JCAMP-DX (.dx, .jdx)Galactic SPC (.spc)CSV / TSVExcel (.xlsx)Plain text (auto-detect)

Why Researchers Are Switching from OPUS

Vendor lock-in. OPUS only works with Bruker instruments — licenses are tied to specific serial numbers. If your lab uses spectrometers from multiple vendors, you need completely separate software ecosystems. SpectralBench is vendor-neutral and reads data from any manufacturer.

Proprietary file format. OPUS uses a proprietary binary format that can only be read by Bruker software. SpectralBench reads OPUS files natively, freeing your data from the Bruker ecosystem.

Expensive libraries. Bruker sells reference spectral libraries separately at $1,000+ each. SpectralBench includes 50,000+ reference spectra from open databases at no cost.

No collaboration. OPUS has no sharing or collaboration features. SpectralBench lets you share spectra via a single link, contribute to a community library, and generate PDF reports for publications.

Feature Comparison

FeatureBruker OPUSSpectralBench
PlatformWindows only (Bruker workstation)Any browser (Mac, Linux, Windows, iPad)
CostBundled with Bruker instruments ($$$)Free
LicenseTied to Bruker instrument serial numberNo license needed
File FormatsProprietary OPUS (.0-.9) + limited exportReads OPUS natively + 6 other formats
Reference LibraryBruker-sold libraries ($1000+)50,000+ open spectra free
PreprocessingFull suite (Bruker-optimized)ALS, polynomial, SNIP, rubberband, Savitzky-Golay, derivatives
AI InterpretationNoneClaude-powered spectral analysis
CollaborationNoneShareable links, community library
Multi-instrumentBruker onlyVendor-neutral (any manufacturer)
Active DevelopmentPeriodic updates (Bruker-controlled)Independent, regular updates

Getting Started in 30 Seconds

1

Open SpectralBench

No download, no installation, no Bruker license. Just open your browser and go.

2

Drop Your OPUS File

Drag your OPUS (.0-.9), JCAMP-DX, SPC, or CSV file onto the viewer. Format is auto-detected.

3

Analyze & Export

Identify peaks, correct baselines, run PCA, match references, and export in any format.

Supported File Formats

SpectralBench reads Bruker OPUS files natively — no conversion or Bruker software needed. Simply drag your .0, .1, .2 (etc.) files directly into the viewer.

  • Bruker OPUS (.0-.9)
  • JCAMP-DX (.dx, .jdx)
  • Galactic SPC (.spc)
  • Thermo SPA (.spa)
  • CSV / TSV
  • Excel (.xlsx)
  • Plain Text (auto-detect)
  • JSON

Additional vendor-specific formats are on the roadmap. If you need a specific format, let us know.

Frequently Asked Questions

What is Bruker OPUS?

OPUS is Bruker's proprietary spectroscopy software for their FTIR, Raman, and NIR instruments. It is the primary data acquisition and analysis tool for Bruker spectrometers, but requires a Bruker instrument license to operate.

Can I use OPUS without a Bruker instrument?

No. OPUS licenses are tied to Bruker instrument serial numbers — you cannot install or use OPUS without owning a Bruker spectrometer. SpectralBench reads OPUS files without any Bruker hardware or license.

Can SpectralBench open Bruker OPUS files?

Yes. SpectralBench reads OPUS files (.0 through .9 extensions) natively. Simply drag and drop your OPUS file into the viewer — no conversion or Bruker software needed.

Is OPUS software free?

No. OPUS is bundled with Bruker instruments and requires an active license tied to the instrument serial number. There is no free or standalone version. SpectralBench is completely free with no license requirements.

What about OPUS spectral libraries?

Bruker sells reference spectral libraries separately, typically costing $1,000 or more per library. SpectralBench includes 50,000+ reference spectra from open databases (ROD, NIST, and curated sources) at no cost.

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