Observed arrival · 2026-09-19

MolQuill: a browser-based chemical structure editor

molquill.com Visit website

Editorial interest 86/100 Selection signal · not a rating of the site

MolQuill draws molecules and reaction schemes, then opens and saves CDX, CDXML, molfile, SDF, RXN, and SMILES files.

Landing page captured for the 2026-09-19 issue.

For: Chemists handling CDX and CDXML files
Worth noticing: It uses ACS Document 1996 settings by default and exports SVG or PNG at up to 600 dpi.

Field notes

MolQuill targets a specific interoperability gap by supporting CDX and CDXML alongside molfile, SDF, RXN, and SMILES. Its browser editor exposes chemistry-oriented calculations while drawing, including exact mass, molecular weight, m/z, and elemental analysis. The page says files remain local, while the paid desktop edition adds native dialogs, same-file saving, recent files, and offline use.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

$PaidCommerce or pricing visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

One card from the complete issue

Filed Under: Missing Tooth

336,080 arrived 998 judged 982 catalogued Enter the complete issue