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Chemeditor (Chemie-Lernprogramme)
A browser editor for composing Unicode chemical formulas, simple structural formulas, and reaction equations for word processors.
Open source. 12 of 65 checklist features confirmed.
Main canvas
Paclitaxel SMILES remains literal text; no molecular drawing.
Default drawings
Could not load this input
Caffeine
Could not load this input
Paclitaxel
No 3D view
Cholesterol in 3D
- No version was shown; identifier is the served HTML SHA-256 prefix.
- The main editing area is a monospaced text field.
- Benzene and methane templates insert multiline character diagrams.
- Fixture screenshots show literal input rather than molecular drawings.
- PNG popup was blank in the isolated WebKit host; export remains unverified.
Facts
- Version we tested
- sha256:4c8fae476591
- Runs on
- Browser
- License
- Program code under GPLv3; original media under CC BY 4.0.
- Price
- Free
- Relies on
- No third-party engine found. Own Unicode text composer and PNG renderer; FileSaver only handles downloads.
- Draws with
- Browser text rendering; HTML Canvas 2D text rendering for PNG export
- Interface
- Plain HTML/CSS and JavaScript
- Main language
- JavaScript
- Other languages
- None
- Renderer
- Original: Unicode text and Canvas text renderer
- Third-party licenses
- Offline download includes GPL-2.0 Liberation fonts with a font embedding exception.
- Structures are Unicode text and require a monospaced font.
- Multiple structures must be arranged in a separate word processor.
- PNG export uses fixed 16-pixel monochrome text.
In use
Screenshots from our test of this version.
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
- Partly: Single, double, triple characters insert as text, not bonds. Opens the screenshot.Single, double and triple bondsSingle, double, triple characters insert as text, not bonds.chemie-lernprogramme.de
- No: No wedge, hashed wedge, or wavy bond controls visible. Opens the cited page.Wedge, hash and wavy bondsNo wedge, hashed wedge, or wavy bond controls visible.
- Not establishedDative, hydrogen and quadruple bonds
- Not establishedChoose double-bond side
- Partly: Benzene text template inserts; no general ring tools. Opens the screenshot.Ring toolsBenzene text template inserts; no general ring tools.chemie-lernprogramme.de
- Not establishedChair and Haworth rings
- Not establishedChain tool
- Partly: Structure templates insert fixed character diagrams, not chemical objects. Opens the cited page.Template libraryStructure templates insert fixed character diagrams, not chemical objects.chemie-lernprogramme.de
- Partly: Offline templates require manual JavaScript and HTML edits. Opens the cited page.Save your own templatesOffline templates require manual JavaScript and HTML edits.chemie-lernprogramme.de
- Not establishedGroup abbreviations
- Partly: Unicode charges and isotope digits; no atom-property editing. Opens the cited page.Charges, isotopes and atom labelsUnicode charges and isotope digits; no atom-property editing.chemie-lernprogramme.de
- Yes, according to the manual: Lone pairs use text strokes around element symbols. Opens the cited page.Radicals and lone pairsLone pairs use text strokes around element symbols.chemie-lernprogramme.de
- Not establishedKeyboard drawing
- Not establishedLasso select and transforms
- Not establishedTilt drawings in perspective
Reactions and mechanisms
- Partly: Forward and equilibrium characters insert into text. Opens the screenshot.Reaction arrowsForward and equilibrium characters insert into text.chemie-lernprogramme.de
- No: No curved electron-pushing arrow tool visible. Opens the cited page.Curved mechanism arrowsNo curved electron-pushing arrow tool visible.
- Not establishedMachine-readable reactions
- Not establishedAtom mapping
- Yes, according to the manual: Palette includes chemical charge, bond and electron-pair symbols. Opens the cited page.Orbitals and symbolsPalette includes chemical charge, bond and electron-pair symbols.chemie-lernprogramme.de
Figures and layout
- Partly: Unicode subscripts and superscripts; fixed-width plain text without mixed styling. Opens the cited page.Rich text captionsUnicode subscripts and superscripts; fixed-width plain text without mixed styling.chemie-lernprogramme.de
- Not establishedShapes, brackets and curves
- Not establishedAlign and distribute
- Not establishedGroup and ungroup
- Not established2D structure cleanup
- Not establishedJournal drawing styles
- Not establishedReusable custom styles
- Not establishedColor control
- No: Plaintext formulas and monochrome rendering lack atom or bond backgrounds. Opens the cited page.Color highlightingPlaintext formulas and monochrome rendering lack atom or bond backgrounds.chemie-lernprogramme.de
- 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
- No: No calculation command or computed formula and mass display. Opens the cited page.Formula and massNo calculation command or computed formula and mass display.
- Not establishedProperty estimates
- No: Typing caffeine leaves literal text. Opens the cited page.Name to structureTyping caffeine leaves literal text.
- No: No structure naming command visible. Opens the cited page.Structure to nameNo structure naming command visible.
- Not establishedNMR prediction
- Not establishedR-groups and query structures
- Not establishedPolymers and repeat units
- Not establishedPeptides and nucleic acids
- Not establishedImage to structure
- Not establishedOnline structure lookup
- No: No rotatable 3D viewer control visible. Opens the cited page.3D model viewNo rotatable 3D viewer control visible.
- Not establishedCrystal structures
Files and exchange
- No: No CDXML import or export control visible. Opens the cited page.CDXML import and exportNo CDXML import or export control visible.
- Not establishedCDX import and export
- No: No MOL or SDF import or export control visible. Opens the cited page.MOL and SDFNo MOL or SDF import or export control visible.
- No: SMILES input remained literal text; no chemistry conversion. Opens the cited page.SMILESSMILES input remained literal text; no chemistry conversion.
- Not establishedInChI
- Not establishedRXN files
- No: No SVG export control visible. Opens the cited page.SVG exportNo SVG export control visible.
- No: No PDF export control visible. Opens the cited page.PDF exportNo PDF export control visible.
- Partly: PNG button opened blank popup in isolated WebKit host. Opens the cited page.High-resolution PNGPNG button opened blank popup in isolated WebKit host.chemie-lernprogramme.de
- Not establishedPaste to and from ChemDraw
- Partly: Copies editable Unicode text, without an embedded chemical structure object. Opens the cited page.Editable in Word or PowerPointCopies editable Unicode text, without an embedded chemical structure object.chemie-lernprogramme.de
- No: Copies Unicode text into Office, without embedded chemical object editing. Opens the cited page.Windows Office OLECopies Unicode text into Office, without embedded chemical object editing.chemie-lernprogramme.de
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
- Yes, according to the manual: Paste supplied data-URI iframe snippet into Moodle's HTML editor. Opens the cited page.Embed in your own appPaste supplied data-URI iframe snippet into Moodle's HTML editor.chemie-lernprogramme.de



