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Catch tricky cuts before you cut glass

Upload your hand-drawn stained glass pattern and get instant feedback on weak joints, hinge lines, and acute angles - the cuts most likely to crack at the table.

Free to try, no account needed.

Print a Drawing Sheet

A4 sheet with corner markers for your sketch

Upload Your Drawing

Get your design reviewed for problem areas

Design from Scratch

Open a blank canvas and draw your pattern

How it works

  1. 1

    Print

    Download and print the drawing sheet

  2. 2

    Draw

    Sketch your design with a dark marker

  3. 3

    Scan

    Take a photo or scan your drawing

  4. 4

    Review

    Get instant feedback on cutting difficulty

See example patterns and analysis results