All tools
Free Spectroscopy Tools for Spectral Analysis
17 browser-based tools for FTIR, Raman, UV-Vis, NIR, and SERS analysis. Open 30+ spectral file formats from Bruker, Thermo Fisher, PerkinElmer, Horiba, and Renishaw — no download, no account, works on any device.
All 17 Tools in One Workbench
Every tool below works together inside SpectralBench — drag-and-drop your files, and switch between viewing, peak identification, comparison, PCA, AI interpretation, and more without leaving the app.
Open Workbenchw/ All Tools
No download · No account required · Works on any device
File Tools
Open, convert, and compare spectral data files
Spectral File Viewer
Multi-spectrum overlay with color-coded traces, spectral math (subtract, average, ratio), and publication-ready SVG export with journal presets.
Spectral File Converter
Batch convert between JCAMP-DX, SPC, CSV, and other spectroscopy formats. Metadata preserved across conversions with ZIP download for batch jobs.
Compare Spectra
Five comparison modes — overlay, stack, difference, mirror, and split — with HQI similarity scoring for quantitative spectral matching.
Analysis & Identification
Identify peaks, fit curves, run PCA, and interpret spectra with AI
FTIR Peak Identifier
Automatic peak detection with functional group assignment using a co-occurrence rule engine. 80+ functional group entries for compound class identification.
Raman Peak Identifier
Identify materials, polymers, minerals, and carbon compounds from Raman spectra. 65+ band entries with confidence scoring and material category assignment.
PCA & Chemometrics
Principal component analysis for multi-spectrum datasets. Score plots, loading plots, scree plots, and outlier detection — no coding or statistics software required.
Curve Fitting
Fit Gaussian, Lorentzian, and pseudo-Voigt peak shapes to spectral bands using Levenberg-Marquardt optimization. R² goodness-of-fit output for each model.
AI Spectrum Interpreter
AI-powered spectral interpretation that identifies compound classes, functional groups, and sample characteristics. Works with FTIR, Raman, UV-Vis, NIR, and fluorescence.
Spectral Preprocessing
Baseline correction (SNIP, polynomial, rubberband), Savitzky-Golay smoothing, min-max and vector normalization, and 1st/2nd derivatives.
Spectral Library Search
Match unknown samples against reference spectra from open-access databases. HQI-ranked results across FTIR, Raman, NIR, UV-Vis, and fluorescence modalities.
Calculators & Guides
Unit conversions, quantitative calculations, and method selection
Spectroscopy Unit Converter
Convert between wavenumber (cm⁻¹), wavelength (nm, μm), frequency (THz), and energy (eV, kJ/mol) with instant bidirectional calculation.
Beer-Lambert Law Calculator
Calculate absorbance, molar absorptivity, path length, or concentration. Interactive concentration-vs-absorbance graph for teaching and lab work.
SNR Calculator
Signal-to-noise ratio with linear and dB output, quality rating benchmarks by technique, and 3σ detection limit estimation.
Spectroscopy ROI Calculator
Model test volume, labor costs, and projected annual savings from automating spectroscopy workflows. Pre-built scenarios for pharma, materials, and food science.
SaMD Classification Wizard
Determine your spectroscopy software's FDA SaMD risk classification and regulatory pathway (510(k), De Novo, PMA) in 5 guided questions.
Spectroscopy Modality Guide
Interactive decision wizard that recommends FTIR, Raman, NIR, UV-Vis, or SERS based on your sample type, measurement goal, and constraints.
Blackbody Radiation Calculator
Planck spectral radiance curves with Wien's peak wavelength, Stefan-Boltzmann total emittance, and emissivity correction. Compare up to 3 temperatures simultaneously.
Why Use Browser-Based Spectroscopy Tools?
Traditional spectroscopy software — OMNIC, OPUS Viewer, Spectragryph, LabSpec — requires installation, runs on a single operating system, and often locks you into one instrument vendor's file format. SpectralBench replaces that workflow with tools that run entirely in your browser, with no software to install and no vendor lock-in.
SpectralBench works on Windows, macOS, Linux, and Chromebooks without installation or IT approval. All 30+ supported file formats — including vendor-specific binary formats like Bruker OPUS, Thermo SPA/SPG, Renishaw WDF, and Horiba NGS — are handled natively, so you never need a separate converter or plugin.
Beyond file handling, SpectralBench integrates tools that traditionally require separate software packages: PCA and curve fitting replace MATLAB or R scripts, AI interpretation accelerates compound identification, and the reference library with thousands of open-access spectra eliminates the need for expensive commercial spectral databases. Combine these with our educational guides to go from raw data to publishable results without switching applications.
Reference Library
Thousands of open-access spectra from USGS, ROD, FPbase, and more
Learn Spectroscopy
Guides on FTIR interpretation, Raman analysis, Beer-Lambert law, and more
Community Library
Browse and contribute spectra shared by the SpectralBench community