Signs you in as a read-only demo user. Your changes reset every night at 03:00 Madrid — draw freely.
A small language for control-system drawings.
Every DCS drawing system has the same shape underneath: a compact list of pen instructions in a database, and a renderer that turns those instructions into paper. The database is the source of truth. The rendered page is disposable. DrawLang is that language, made explicit — small, frozen, and human-readable.
7 core opcodes, frozen forever, plus 4 additive extensions. Two-letter mnemonics, comma-separated args, semicolon-terminated. A whole drawing is a flat text program. No hidden primitives, no vendor extensions.
Open-source web editor for A3 FUP frames with 28×14-cell grid coordinates. Drop pre-built symbols, save your own library, edit statement-by-statement, or type plain English (“move right 20”, “line down 30”).
Drawings you make are plain-text programs you can commit to git, diff, template, and round-trip through any compliant interpreter forever. No cloud lock-in. No vendor account. SQLite behind a public API.
# draw a labeled 14×1 line — this is a valid DrawLang program
mr,0,158;
dl,14,0;
mr,0,-1;
dl,-14,0;
tz,8;
tx,0.,A1;
mrmove relativemamove absolutedldraw linertrectanglecicircletztext sizetxtextararcbzBézier curvespsplineimimage referenceAccess your DrawLang editor account.