A structure editor that opens .cdx and .cdxml
Draw molecules and reaction schemes in your browser. MolQuill opens and saves .cdx, .cdxml, molfile, SDF, RXN and SMILES, and uses ACS Document 1996 settings by default.
Files are read locally and never uploaded.
Features
- Drawing style
- ACS Document 1996 by default (14.4 pt bonds, 0.6 pt lines). RSC, Wiley and presentation styles are included.
- Stereochemistry
- Wedge and hash bonds, with R/S and E/Z labels on request.
- Reactions
- Arrows with reagents and conditions, equilibrium arrows, plus signs, brackets and curved arrows.
- Name to structure
- Type an IUPAC name such as (R)-2-butanol and get the structure, stereochemistry included.
- Templates
- Rings, functional groups, amino acids and sugars, including chair and boat cyclohexanes.
- Analysis
- Formula, exact mass, molecular weight, m/z and elemental analysis for the whole drawing or a selection.
- Files
- Open and save CDXML, CDX, molfile (V2000 and V3000), SDF, RXN and SMILES. Export SVG and PNG up to 600 dpi.
Desktop app
The browser version is free and has every feature. The desktop app costs $20 as a one-time purchase and adds regular file handling: native Open and Save dialogs, Ctrl+S saving back to the same file, double-click to open .cdx files, a recent files list, and offline use.
One purchase covers Linux, Windows and macOS. There is no activation or license server.
There is no checkout page yet. Email hello@molquill.com and I will send the installers and payment details.
Known limitations
MolQuill is at version 1.0 and is written and maintained by one person.
- Structure to name is not supported yet.
- The macOS build has not been tested on a Mac.
- The Windows and macOS installers are unsigned, so the operating system will show a warning the first time you open them.
Feedback
Bug reports are welcome, especially files that open incorrectly. Send them to hello@molquill.com.