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Chem Sketcher (Non_REM.Persona Laboratory)
A browser-based editor for drawing chemical structures and estimating properties.
Free. 11 of 65 checklist features confirmed.
Main canvas
Needs an account or a purchase
Needs an account or a purchase
Default drawings
We could not finish testing this tool: The publisher's HTML file is behind a ¥100 purchase or social-sharing access gate. No public hosted editor or direct download was found; purchase and account sign-in were not authorized.
Needs an account or a purchase
Caffeine
Needs an account or a purchase
Paclitaxel
Needs an account or a purchase
Cholesterol in 3D
Facts
- Runs on
- Browser
- License
- Free use advertised; no explicit software license.
- Price
- Free via sharing promotion, or ¥100 (2026-11-05).
- Relies on
- Not established. Author claims self-built editor and custom ring geometry; dependencies remain unconfirmed.
- Interface
- React
- Main language
- Not published
- Other languages
- Not established
- Renderer
- Not established
- Third-party licenses
- Not established
- Download requires note's sharing promotion or a ¥100 purchase.
- Property estimates use a simplified group-contribution method.
- Offline support, mobile compatibility and publication-resolution output are unverified.
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, according to the manual: Single, double and triple bonds; vendor claim. Opens the cited page.Single, double and triple bondsSingle, double and triple bonds; vendor claim.note.com
- Partly: Wedge/dash documented; wavy unverified; vendor claim. Opens the cited page.Wedge, hash and wavy bondsWedge/dash documented; wavy unverified; vendor claim.note.com
- Not establishedDative, hydrogen and quadruple bonds
- Not establishedChoose double-bond side
- Yes, according to the manual: Benzene and cyclohexane tools; vendor claim. Opens the cited page.Ring toolsBenzene and cyclohexane tools; vendor claim.note.com
- Not establishedChair and Haworth rings
- Yes, according to the manual: Drag chains; vendor claim. Opens the cited page.Chain toolDrag chains; vendor claim.note.com
- Yes, according to the manual: PEG, PPG and PDMS units; vendor claim. Opens the cited page.Template libraryPEG, PPG and PDMS units; vendor claim.note.com
- Not establishedSave your own templates
- Not establishedGroup abbreviations
- Partly: Element labels documented; charges/isotopes unverified. Opens the cited page.Charges, isotopes and atom labelsElement labels documented; charges/isotopes unverified.note.com
- Not establishedRadicals and lone pairs
- Not establishedKeyboard drawing
- Partly: Selection documented; rotation, flip and resizing unverified. Opens the cited page.Lasso select and transformsSelection documented; rotation, flip and resizing unverified.note.com
- Not establishedTilt drawings in perspective
Reactions and mechanisms
- Not establishedReaction arrows
- Not establishedCurved mechanism arrows
- Not establishedMachine-readable reactions
- Not establishedAtom mapping
- Not establishedOrbitals and symbols
Figures and layout
- Not establishedRich text captions
- Partly: Brackets documented; other shapes unverified; vendor claim. Opens the cited page.Shapes, brackets and curvesBrackets documented; other shapes unverified; vendor claim.note.com
- Not establishedAlign and distribute
- Not establishedGroup and ungroup
- Not established2D structure cleanup
- Not establishedJournal drawing styles
- Not establishedReusable custom styles
- Not establishedColor control
- Not establishedColor highlighting
- Not establishedPage layout and multipage
- Not establishedImported pictures
- Not establishedTLC plates and tables
Chemistry intelligence
- Not establishedStructure checking
- Not establishedR/S and E/Z labels
- Partly: Mass documented; formula unverified; vendor claim. Opens the cited page.Formula and massMass documented; formula unverified; vendor claim.note.com
- Yes, according to the manual: clogP, HSP and IOB; vendor claim. Opens the cited page.Property estimatesclogP, HSP and IOB; vendor claim.note.com
- Not establishedName to structure
- Not establishedStructure to name
- Not establishedNMR prediction
- Not establishedR-groups and query structures
- Yes, according to the manual: Repeat-unit templates and polymer brackets; vendor claim. Opens the cited page.Polymers and repeat unitsRepeat-unit templates and polymer brackets; vendor claim.note.com
- Not establishedPeptides and nucleic acids
- Not establishedImage to structure
- Not establishedOnline structure lookup
- Not established3D model view
- Not establishedCrystal structures
Files and exchange
- Not establishedCDXML import and export
- Not establishedCDX import and export
- Not establishedMOL and SDF
- Not establishedSMILES
- Not establishedInChI
- Not establishedRXN files
- Not establishedSVG export
- Not establishedPDF export
- Not establishedHigh-resolution PNG
- 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: Standalone HTML download; no documented embedding API or component found.Embed in your own appStandalone HTML download; no documented embedding API or component found.note.com