Frame your subject.
Choose 80–180 pins, a 100–600 mm board, contrast and framing. The optimizer builds only useful additional connections, up to your chosen limit.
PHOTO → PATTERN → THREAD
A continuous pin-to-pin route, a print-ready board template and a guide that remembers your place.
Threadarc creates circular string art with black thread on a white board. Everything is calculated on your device.
iOS and Android editions are in preparation. Paid once, with no subscription.
See the actual outputChoose 80–180 pins, a 100–600 mm board, contrast and framing. The optimizer builds only useful additional connections, up to your chosen limit.
A clear from-pin and to-pin pair guides each connection. Mark it done, undo a slip and resume your saved project later.
A4 and Letter PDFs tile the pin layout at 1:1 scale. A 50 mm calibration line helps you check your printer settings before placing pins.



These fictional leaf-sample files are generated output, not a mockup.
Open the A4 guide PDFFull-size pin SVGContinuous route CSVPrint at 100% / Actual Size, disable Fit to page and measure the calibration line. Thread length excludes wraps and knots. Preview is a geometric approximation; material and tension affect the final piece.
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