Chemistry tools that run in your browserDraw a structure, compute a spectrum, titrate an acid, hand out an exercise series. Each tool opens from a link: free, nothing to install, ready for a lecture or a lab.Chemistry basicsWhere a course starts, and what you go back to.

ChemCalc: Molecular formula, exact mass and isotopic distribution.

dbe.cheminfo.org: Count rings and double bonds from a formula or a structure.

lcao.cheminfo.org: Combine atomic orbitals into molecular ones.

EquiLibrium: Chemical equilibria: pH, speciation and titration curves.

PeriodicTable: The periodic table, coloured, plotted and taken apart.

SymmeTry: Find the symmetry of a molecule, a crystal or a pattern.

PracticeWhere a first course is worked through, one graded series at a time.

atoms.cheminfo.org: Electrons, neutrons, Lewis structures and oxidation states.

moles.cheminfo.org: Balance a reaction, and work out its mass composition.

inorganic.cheminfo.org: Name an inorganic compound, and write its formula.

tlc.cheminfo.org: Read a TLC plate, get its Rf, and weigh its eluent.

glassware.cheminfo.org: Assemble lab glassware into a working apparatus, and draw it.

Structures & notationDraw a molecule, convert it between notations, see it in space.

inchi.cheminfo.org: InChI and InChIKey from a structure, in the browser.

smiles.cheminfo.org: Draw a structure, read its SMILES, learn the notation.

iupac-name: The IUPAC name of a structure, and the structure a name denotes.

openbabel.cheminfo.org: Convert a structure between any pair of chemical file formats.

isomers.cheminfo.org: Every constitutional isomer of a molecular formula.

3d.cheminfo.org: Conformers in 3D from a structure you draw.

SpectraProcess a measurement, and work back to the structure behind it.

NMRium: Process and assign NMR spectra in the browser.

metabo.nmrium.com: Turn a batch of NMR spectra into a map of your samples.

DerepFlow: Identify the constituents of a mixture from its ¹³C spectrum.

elucidation.cheminfo.org: A structure from a 1H NMR spectrum and a formula.

spectroscopy.cheminfo.org: Find a structure from its IR, mass and NMR spectra.

vibrations.cheminfo.org: IR and Raman spectra computed in the browser.

Research & dataSpecialised work: real datasets, and molecules nobody has made.

vcl.cheminfo.org: Combine a core and fragments into a screened library.

pdb.cheminfo.org: A fast look at any Protein Data Bank entry.

PolyCarp: Predict the microstructure of a radical copolymerisation.

chembio: Natural products, and the organisms they were found in.

wikidata.cheminfo.org: The chemistry of Wikipedia’s infoboxes, searchable by structure.

osiris.cheminfo.org: Predicted toxicity risks and properties, one molecule or many.

Computing & teachingAround the chemistry: build a course, typeset it, parse it.

learn.cheminfo.org: Arrange the tools into a course and hand out its link.

tex.cheminfo.org: LaTeX formulas rendered to SVG or PNG from a URL.

regexp.cheminfo.org: Learn regular expressions in a live playground.

database.cheminfo.org: Query a real chemical dataset in SQL and in Mango.

slides.cheminfo.org: Put a live tool on a slide, from the link its Share button gives.

draw.cheminfo.org: Journal-grade structures, in an SVG that keeps the chemistry.

Every cheminfo tool, by topic, with what is new on each and the classic visualizer views. This page needs JavaScript; every tool it lists is a link of its own.

Tools — every cheminfo tool, by topic

News — new tools and new features, dated

Classic views — the visualizer views of the classic site

About — who provides the tools, and how to cite them

Our other tools

learn.cheminfo.org — Arrange the tools into a course and hand out its link.

inchi.cheminfo.org — InChI and InChIKey from a structure, in the browser.

vcl.cheminfo.org — Combine a core and fragments into a screened library.

smiles.cheminfo.org — Draw a structure, read its SMILES, learn the notation.

iupac-name.cheminfo.org — The IUPAC name of a structure, and the structure a name denotes.

openbabel.cheminfo.org — Convert a structure between any pair of chemical file formats.

www.chemcalc.org — Molecular formula, exact mass and isotopic distribution.

dbe.cheminfo.org — Count rings and double bonds from a formula or a structure.

www.nmrium.org — Process and assign NMR spectra in the browser.

metabo.nmrium.com — Turn a batch of NMR spectra into a map of your samples.

derepflow.cheminfo.org — Identify the constituents of a mixture from its ¹³C spectrum.

isomers.cheminfo.org — Every constitutional isomer of a molecular formula.

tex.cheminfo.org — LaTeX formulas rendered to SVG or PNG from a URL.

lcao.cheminfo.org — Combine atomic orbitals into molecular ones.

regexp.cheminfo.org — Learn regular expressions in a live playground.

pdb.cheminfo.org — A fast look at any Protein Data Bank entry.

elucidation.cheminfo.org — A structure from a 1H NMR spectrum and a formula.

spectroscopy.cheminfo.org — Find a structure from its IR, mass and NMR spectra.

equilibrium.cheminfo.org — Chemical equilibria: pH, speciation and titration curves.

polycarp.cheminfo.org — Predict the microstructure of a radical copolymerisation.

3d.cheminfo.org — Conformers in 3D from a structure you draw.

periodic-table.cheminfo.org — The periodic table, coloured, plotted and taken apart.

database.cheminfo.org — Query a real chemical dataset in SQL and in Mango.

chembio.cheminfo.org — Natural products, and the organisms they were found in.

wikidata.cheminfo.org — The chemistry of Wikipedia’s infoboxes, searchable by structure.

symmetry.cheminfo.org — Find the symmetry of a molecule, a crystal or a pattern.

osiris.cheminfo.org — Predicted toxicity risks and properties, one molecule or many.

atoms.cheminfo.org — Electrons, neutrons, Lewis structures and oxidation states.

moles.cheminfo.org — Balance a reaction, and work out its mass composition.

inorganic.cheminfo.org — Name an inorganic compound, and write its formula.

slides.cheminfo.org — Put a live tool on a slide, from the link its Share button gives.

vibrations.cheminfo.org — IR and Raman spectra computed in the browser.

draw.cheminfo.org — Journal-grade structures, in an SVG that keeps the chemistry.

tlc.cheminfo.org — Read a TLC plate, get its Rf, and weigh its eluent.

glassware.cheminfo.org — Assemble lab glassware into a working apparatus, and draw it.