Build .

Weave a sett (thread count), recolour it into a whole line, and export seamless tiles.

Weave look

Orientation
Face
Ground
Diagonal = check on the bias · Classic = square tartan grid. Twill weaves the face; Plain crosses it gingham-style. Ground is your base colour (first palette entry).

Palette source

Palette

The sett (thread count)

Threadcount recipe — paste a published sett, e.g. K4 A4 G16 B16 W2 or B/24 W4 B24 R2 K24 G24 W/2
Standard codes: K black · B blue · G green · R red · W white · Y yellow · A azure · N grey · T tan · P purple · C crimson · O orange · LB/DG etc. light/dark. Or use #hex6 in place of a code.
Where to find recipes
Official
Scottish Register of Tartans — the canonical list; threadcounts public. Entries marked Restricted need the designer's permission for commercial use.
Scottish Tartans Authority — heritage archive, history notes.
Wiki / free-licence
Wikipedia: List of tartans · Wikimedia Commons tartans — CC BY-SA; threadcounts are facts, images need attribution if reused.
Public-domain books (out of copyright, free to use commercially)
Internet Archive · Google Books — Logan The Scottish Gael (1831), Vestiarium Scoticum (1842), Grant (1886), Whyte (1891), Johnston (1906).
Compiled weaver tables
Tartan Dictionary · thetartan/tartan-database — handy lookup, but the compilations are licensed CC BY-NC-ND 4.0: non-commercial, no derivatives. Take the sett, then confirm it against the Register or a PD book before selling.
Weddslist — private compilation, no licence stated; treat as reference only.
Mirror sett (symmetric)
Mirroring reflects the bands at each pivot — the classic symmetric tartan repeat.

Design .

Repeat: — Mode: — Threads: —
pattern preview
Page & export

Tray & colourways .

Save palette variations as named tiles, curate the line, and take the whole series home as one ZIP — every file stamped with its palette.
Save the current palette as a colourway, or load a preset line to start a series.

The Tray — unlock with All-Access

Turn one design into a whole batch of colourways, bank up to 120 tiles as you go, and grab them all in a single ZIP.

Wrap it Your Way — easy peasy.
Get All-Access
Single-file downloads stay free.