Cheminformatics suite
Advanced chemical analytics,
in your browser.
Molecular analysis, visualization, and data processing — no install, no signup.
Database
Featured molecules
C8H10N4O2
· 58-08-2
C9H8O4
· 50-78-2
C2H6O
· 64-17-5
C8H8O3
· 121-33-5
Tools
Cheminformatics tools
Calculators
Compute the numbers you need.
Molar Mass Calculator
Calculate molecular weights from any chemical formula. Live element breakdown with percent composition.
Open →pH Calculator
Strong / weak acids, bases, and buffers. Henderson-Hasselbalch and the full Ka/Kb equilibrium walkthrough.
Open →Stoichiometry Calculator
Limiting reagents, theoretical yields, and reaction quantities — with full unit propagation.
Open →Vapor Pressure Calculator
Antoine equation with smart parameter lookup. Built for distillation design and phase-equilibrium work.
Open →Analysis
Predict and evaluate, not just calculate.
NMR Predictor
Predict 1H and 13C NMR spectra from structure. Chemical shifts, coupling patterns, and integrations.
Open →Equation Balancer
Balance any reaction — organics, redox, polyatomic ions — with step-by-step verification.
Open →Drug-Likeness
Lipinski Ro5, Veber, lead-likeness — MW, LogP, HBD, HBA, TPSA from a SMILES string.
Open →Signum
NMR / IR / UV-Vis spectral workbench. Peak picking, integration, baseline correction in your browser.
Open →Editors & converters
Sketch, view, and translate structures.
Covalent
Free, fast in-browser molecular editor. Bonds, rings, element selection, export — a real ChemDraw alternative.
Open →SMILES → Structure
Visualize SMILES as 2D structures with proper bond geometry, atom positions, and stereochemistry.
Open →Spectroscopy File Converter
JCAMP-DX, CSV, and the other common spectroscopy formats — round-tripped in your browser, no upload.
Open →Pressure Unit Converter
Convert across Pa, kPa, bar, atm, psi, mmHg, torr — with sane defaults for engineering work.
Open →