Which characters can I use?

Unicode box-drawing (┌─┐│└┘) and arrows (→ ← ↑ ↓ ─ │).

Is anything sent online?

No. This tool is plain text only.

Preview uses a monospace font so columns align.

Draw box-and-arrow diagrams with Unicode box-drawing characters. Live preview, fully offline.

ASCII source

Preview

Type or paste box-drawing text. Use Insert box / arrow for snippets. Copy the result from the preview.

Which characters can I use?: Unicode box-drawing (┌─┐│└┘) and arrows (→ ← ↑ ↓ ─ │).
Is anything sent online?: No. This tool is plain text only.
Monospace font?: Preview uses a monospace font so columns align.