ASCII / Unicode Grid Diagram
Draw actual boxes, lines, arrows and labels in a bounded character grid.
Enabling local controls…
1. Source and settings
Local processing only; nothing is fetched, executed, uploaded or persisted. Each field32KiB; complete output1MiB. CPU work uses a cancellable Worker:10s startup/1s processing. Editing clears old results and exports.
Model, limits and sources
Commands: box x y width height label; line/arrow x1 y1 x2 y2; text x y label. Coordinates are 1-based; drawing is clipped. Canvas10–120 ×5–60; max300 commands and coordinate magnitude1,000. Labels preserve Unicode graphemes; CJK/emoji reserve2 cells and ambiguous characters1. Standalone zero-width/control/bidi-override text is refused. Font-specific widths can still differ; line style changes wireframes only.
Source controls inspected2026-10-19; model reviewed2026-10-19.
2. Complete result
Choose an operation and process the input.
How to use this tool
Enter local input, review the explicit options and model, then run and export the complete result.
When not to use it
Commands: box x y width height label; line/arrow x1 y1 x2 y2; text x y label. Coordinates are 1-based; drawing is clipped. Canvas10–120 ×5–60; max300 commands and coordinate magnitude1,000. Labels preserve Unicode graphemes; CJK/emoji reserve2 cells and ambiguous characters1. Standalone zero-width/control/bidi-override text is refused. Font-specific widths can still differ; line style changes wireframes only.