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Mark points and polygon regions on images, draw bezier curves, and export coordinates as JSON, YAML, or HTML image maps.
A browser-based precision tool for marking points and polygon regions on images, solving the problem of translating visual content into structured coordinate data. It is designed for game developers, level designers, UI engineers, ML data labelers, and similar professionals who need to extract coordinates from images. The tool runs entirely in the browser, ensuring images never leave the device, and offers export to JSON, YAML, or HTML image maps, with support for bezier curves, multiple origins, and offline use via PWA.
Key features
- Points, polylines, and polygons
- Bezier curves with handles
- Multiple origin points
- Pixel or normalized coordinates
- Y-axis flip
- Round-trip JSON import
- Undo/redo 100 steps
- Keyboard nudging
- Offline PWA support
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