A stitch in time can save our planet.
From stitching scraps to beautiful designs.
Arrange your square patches. Take a pic. See the magic.
Photograph your scraps and pick from 15 patterns, then stitch the panel by hand.
Free, open source, no AI and no sign-in.
Kantha Chess
No AI. Math finds your squares and arranges your pattern.
Kantha Gradient
Colours are mixed the way light mixes, then judged the way eyes see.
Kantha Centre
Cloth colours are compared on a colour scale built from tests of human eyesight.
Kantha Wave
Squares of the same cloth are matched by their colour fingerprints.
Kantha Border
It sorts your cloths into colour families. For example, 47 cloths in 3 families means 16,215 groupings tried!
Kantha Cross
Patterns are arranged by simulated annealing, maths named after cooling metal.
Kantha Spectrum
It starts with bold swaps, then settles into small careful ones, as hot metal cools.
Kantha Mixed
Every arrangement gets a score. The best score wins.
Kantha Blocks
Lightness runs from 0 for black to 100 for white.
Kantha Ripple
Squares side by side aim for a clear step in lightness, so each seam shows.
Kantha Heart
Same colour looks different beside different neighbours.
Kantha Stripes
Lightness matters more than colour. Squint, and only light and dark are left.
Kantha Zigzag
Thirty-five different squares can be laid out in more ways than there are stars in the universe.
Kantha Chain
Each try starts fresh, so the same cloths can give a new design every time.
Kantha Diamond
All of this maths runs on your device. Your photos never leave it.
The team behind Kantha shaped its features and picked its winning patterns.
Jubina, Saneera, Nisha, Mary Gracy and Seenath of the Stitching Club at aikyam space, with Shabana (opens in a new tab), the club's facilitator.
Who it's for
From the blog
Colours change their neighbours
The same colour looks different beside different colours. This is simultaneous contrast. See it with real cloth in Kantha's Chess pattern.
A favourite colours panel for a class or family
Each child brings a scrap of cloth in a favourite colour. An adult cuts and photographs the squares, and Kantha arranges them into one panel.
Light and dark: why a pattern needs both
A pattern shows because light sits beside dark. See it with real cloth in Kantha's Gradient and Chess patterns, and learn what lightness means.
Warm, cool and the rainbow
Warm and cool colours, the colour wheel and the rainbow. Order cloth by colour with Kantha's Spectrum pattern, and take photos in daylight for true colour.
Bargello with squares, not strips: the Wave pattern
Bargello quilts use strips and a sewing machine. The Wave pattern gives a bargello-style layout from 35 squares of cloth, stitched by hand.
How to cut and photograph cloth squares
Cut 6 × 6 cm squares with a window template and scissors, then photograph them in daylight so the colour comes out true. Step by step.