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Chemliora
A browser editor for drawing chemical structures, reaction schemes and polymers, with image export and approximate spectral predictions.
Free. 39 of 65 checklist features confirmed.
Main canvas
Hosted version now reports 15.20.0.
Default drawings
Caffeine
Paclitaxel
Cholesterol in 3D
- The default canvas used a dark background and coloured heteroatom labels.
- SMILES imports generated layouts automatically without cleanup.
- RDKit canonical isomeric SMILES matched all three exported MOL structures.
- For explicit-hydrogen caffeine SDF, the property table showed C8H20N4O2 instead of C8H10N4O2.
- The default 3D view used ball-and-stick with hydrogens.
Facts
- Latest version
- 15.19.0
- Version we tested
- 15.19.0
- Runs on
- Browser
- License
- Free to use; third-party licenses do not grant redistribution rights to the whole application.
- Price
- Free
- Relies on
- OpenChemLib, GANSU Lite, MOrbVis. License confirms chemistry libraries and optional orbital tools; canvas provenance remains unestablished.
- Draws with
- Custom SVG renderer; HTML canvas for PNG export
- Chemistry from
- OpenChemLib JS
- Interface
- HTML/CSS and vanilla JavaScript
- Main language
- JavaScript
- Other languages
- Java: OpenChemLib compiled to JavaScript; TypeScript: GANSU Lite and MOrbVis modules; Rust: GANSU Lite kernels (WebAssembly)
- Renderer
- Original: Custom SVG bond and atom renderer
- Third-party licenses
- BSD-3-Clause/MIT/Zlib components; NMR calibration credits nmrshiftdb2's custom share-alike database license with an OSI-approved software condition. Raw measurements are not bundled.
- CDX is import-only; PDF export is unavailable.
- ChemDraw compatibility is unverified; save JSON for full re-editing.
- Spectral predictions are approximate; 13C NMR remains experimental.
In use
Screenshots from our test of this version.
Single, double and triple bonds
Single, double, and triple bond tools in the drawing palette.
Wedge, hash and wavy bonds
Wedge, hashed wedge, and wavy bond tools in the palette.
Ring tools
Ring tools beside benzene and cyclohexane drawings.
Group abbreviations
Substituent palette lists Ph, Boc, OMe, and other labels.
Charges, isotopes and atom labels
Element palette and nitrogen and oxygen labels on the canvas.
Radicals and lone pairs
Charge and electron tools include single and paired dots.
Reaction arrows
Forward and equilibrium arrows on the drawing canvas.
Curved mechanism arrows
Curved arrow on the canvas beside the reaction tools.
Shapes, brackets and curves
Polymer bracket tool in the advanced toolbar.
2D structure cleanup
Tidy structure button above the drawing canvas.
R/S and E/Z labels
Structure drawing with a Z label beside the double bond.
Formula and mass
Property table showing molecular formula, exact mass, and molecular weight.
Property estimates
Property estimates table with formula, molecular weight, and logP.
Polymers and repeat units
Polymer bracket and A–B controls in the advanced toolbar.
3D model view
3D ball-and-stick model with conformer and rotation controls.
SMILES
Structure on the canvas with a SMILES generation confirmation.
High-resolution PNG
PNG output showing a cholesterol structure.
Features
- Tested by running it
- Seen in the app
- The manual says yes
- Partly, with the reason shown
- Not supported
- Not established, which is not the same as no
Select a mark for its proof. A filled mark opens our screenshot, or the manual if the check left nothing to picture. A ring opens the manual.
Drawing structures
- Yes, tested by running it: Drew single; changed it to double and triple. Opens the screenshot.Single, double and triple bondsDrew single; changed it to double and triple.chem-analyses.com
- Yes, tested by running it: Converted a bond to solid wedge, hashed wedge, and wavy. Opens the screenshot.Wedge, hash and wavy bondsConverted a bond to solid wedge, hashed wedge, and wavy.chem-analyses.com
- Partly: Coordination and hydrogen contacts are annotations, excluded from chemical exports. Opens the cited page.Dative, hydrogen and quadruple bondsCoordination and hydrogen contacts are annotations, excluded from chemical exports.chem-analyses.com
- Yes, according to the manual. Opens the cited page.Choose double-bond sidechem-analyses.com
- Yes, tested by running it: Placed benzene and cyclohexane rings. Opens the screenshot.Ring toolsPlaced benzene and cyclohexane rings.chem-analyses.com
- Not establishedChair and Haworth rings
- Partly: Freehand zigzags create up to eight bonds; no length-drag tool. Opens the cited page.Chain toolFreehand zigzags create up to eight bonds; no length-drag tool.chem-analyses.com
- Yes, tested by running it: Placed anthracene from the template library. Opens the cited page.Template libraryPlaced anthracene from the template library.chem-analyses.com
- Yes, according to the manual: Favorites are stored only in the current browser. Opens the cited page.Save your own templatesFavorites are stored only in the current browser.chem-analyses.com
- Yes, according to the manual. Opens the cited page.Group abbreviationschem-analyses.com
- Yes, according to the manual. Opens the cited page.Charges, isotopes and atom labelschem-analyses.com
- Yes, according to the manual: Lone pairs are drawing annotations. Opens the cited page.Radicals and lone pairsLone pairs are drawing annotations.chem-analyses.com
- Yes, according to the manual. Opens the cited page.Keyboard drawingchem-analyses.com
- Partly: Rectangle selection, rotation and flips; no lasso or resize controls. Opens the cited page.Lasso select and transformsRectangle selection, rotation and flips; no lasso or resize controls.chem-analyses.com
- Not establishedTilt drawings in perspective
Reactions and mechanisms
- Yes, tested by running it: Drew forward and equilibrium arrows. Opens the screenshot.Reaction arrowsDrew forward and equilibrium arrows.chem-analyses.com
- Yes, tested by running it: Drew curved arrow; selection exposed endpoints and bend controls. Opens the screenshot.Curved mechanism arrowsDrew curved arrow; selection exposed endpoints and bend controls.chem-analyses.com
- Not establishedMachine-readable reactions
- Yes, according to the manual: Manual atom-map numbers are preserved in chemical exports. Opens the cited page.Atom mappingManual atom-map numbers are preserved in chemical exports.chem-analyses.com
- Partly: Simplified calculated HOMO/LUMO shapes in analysis view. Opens the cited page.Orbitals and symbolsSimplified calculated HOMO/LUMO shapes in analysis view.chem-analyses.com
Figures and layout
- Partly: Only plain reaction-condition text; no font or script formatting. Opens the cited page.Rich text captionsOnly plain reaction-condition text; no font or script formatting.chem-analyses.com
- Partly: Polymer brackets and curved arrows only; no general shape objects. Opens the cited page.Shapes, brackets and curvesPolymer brackets and curved arrows only; no general shape objects.chem-analyses.com
- Yes, according to the manual. Opens the cited page.Align and distributechem-analyses.com
- Not establishedGroup and ungroup
- Yes, according to the manual. Opens the cited page.2D structure cleanupchem-analyses.com
- Yes, according to the manual: Nature and ACS presets. Opens the cited page.Journal drawing stylesNature and ACS presets.chem-analyses.com
- Yes, according to the manual: Imported CDS settings persist in browser storage and JSON. Opens the cited page.Reusable custom stylesImported CDS settings persist in browser storage and JSON.chem-analyses.com
- Yes, according to the manual: Individual atom-label colors. Opens the cited page.Color controlIndividual atom-label colors.chem-analyses.com
- Partly: Selection halos are removed from SVG and PNG exports. Opens the cited page.Color highlightingSelection halos are removed from SVG and PNG exports.chem-analyses.com
- Not establishedPage layout and multipage
- Not establishedImported pictures
- Not establishedTLC plates and tables
Chemistry intelligence
- Yes, according to the manual. Opens the cited page.Structure checkingchem-analyses.com
- Yes, according to the manual: Labels omit structures exceeding 200 atoms. Opens the cited page.R/S and E/Z labelsLabels omit structures exceeding 200 atoms.chem-analyses.com
- Partly: Canvas correct; explicit-hydrogen SDF property table overcounts hydrogens. Opens the screenshot.Formula and massCanvas correct; explicit-hydrogen SDF property table overcounts hydrogens.chem-analyses.com
- Partly: logP and TPSA shown; explicit-hydrogen formula was incorrect. Opens the screenshot.Property estimateslogP and TPSA shown; explicit-hydrogen formula was incorrect.chem-analyses.com
- No: No name input found; SMILES field rejected caffeine. Opens the cited page.Name to structureNo name input found; SMILES field rejected caffeine.
- Yes, tested by running it: PubChem lookup returned caffeine's systematic name. Opens the cited page.Structure to namePubChem lookup returned caffeine's systematic name.chem-analyses.com
- Yes, according to the manual: Approximate predictions; 13C remains experimental. Opens the cited page.NMR predictionApproximate predictions; 13C remains experimental.chem-analyses.com
- Not establishedR-groups and query structures
- Yes, according to the manual: Monomer-based repeat-unit generation; save JSON for re-editing. Opens the cited page.Polymers and repeat unitsMonomer-based repeat-unit generation; save JSON for re-editing.chem-analyses.com
- Not establishedPeptides and nucleic acids
- Not establishedImage to structure
- Not establishedOnline structure lookup
- Yes, tested by running it: Generated ten conformers and rotated cholesterol in depth. Opens the screenshot.3D model viewGenerated ten conformers and rotated cholesterol in depth.chem-analyses.com
- Not establishedCrystal structures
Files and exchange
- Yes, tested by running it: Exported and reopened its own cholesterol CDXML. Opens the cited page.CDXML import and exportExported and reopened its own cholesterol CDXML.chem-analyses.com
- Partly: Import only. Opens the cited page.CDX import and exportImport only.chem-analyses.com
- Yes, tested by running it: MOL and SDF imports and exports worked. Opens the cited page.MOL and SDFMOL and SDF imports and exports worked.chem-analyses.com
- Yes, tested by running it: Imported SMILES and copied a generated SMILES. Opens the screenshot.SMILESImported SMILES and copied a generated SMILES.chem-analyses.com
- Not establishedInChI
- Not establishedRXN files
- Yes, tested by running it: Saved default SVG images for all three structures. Opens the cited page.SVG exportSaved default SVG images for all three structures.chem-analyses.com
- No: No PDF export; browser print preview included interface and clipped drawing. Opens the cited page.PDF exportNo PDF export; browser print preview included interface and clipped drawing.chem-analyses.com
- Partly: 4× PNG exported; file reports 72 dpi metadata. Opens the screenshot.High-resolution PNG4× PNG exported; file reports 72 dpi metadata.chem-analyses.com
- Not establishedPaste to and from ChemDraw
- Not establishedEditable in Word or PowerPoint
- Not establishedWindows Office OLE
APIs and automation
- Not establishedPython API
- Not establishedJavaScript or TypeScript API
- Not establishedCommand-line tool
- Not establishedAI agent control
- Not establishedBuilt-in AI assistant
Embedding and extension
- Not establishedPlugins
- Not established: No documented embedding route; absent framing restrictions do not confirm support.Embed in your own appNo documented embedding route; absent framing restrictions do not confirm support.chem-analyses.com