AI-assisted annotation for crowd objects, without the duplicatesv6.3

Changelog

New features and improvements in LabelMe.

  1. 2026

  2. FEATUREv6.3

    AI-assisted annotation for crowd objects, without the duplicates

    Two suppression passes in LabelMe v6.3 stop AI-Box, AI-Points, and AI-Text from stacking redundant predictions on the same object, whether they came from nested SAM granularities or from regions you've already labeled.

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  3. FEATUREv6.2

    AI annotation outputs circles and rectangles, not just polygons

    Pick the output shape for AI-Points and AI-Box: polygon, mask, rectangle, oriented rectangle, or circle. Fitted to the SAM mask, no post-export conversion.

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  4. FEATUREv6.2

    Multi-select labels in LabelMe

    Select many annotations at once and apply the same edit to all of them. Ctrl/Cmd+A grabs every shape on the image, range-select works in the label list, and hide/show propagates across the whole selection as one undoable step.

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  5. FEATUREv6.2

    Oriented rectangle, a rotated bounding box for off-angle objects

    A new shape type in LabelMe v6.2. Three clicks to draw, corner drag to resize, edge midpoint to rotate, with an arrow on the canvas so the heading is never ambiguous.

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  6. FEATUREv6.1

    AI model downloads show progress, and you can cancel

    The first AI click of a fresh install used to freeze the app for minutes while the model downloaded in silence. v6.1 shows a progress bar with bytes, ETA, and a cancel button.

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  7. FEATUREv6.1

    A unified AI toolbar, two tools instead of four

    LabelMe v6.1 collapses four near-identical AI buttons into AI-Points and AI-Box, each with a polygon-or-mask output toggle. A separator between manual and AI tools makes the right button easier to find when you haven't opened the app in a week.

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  8. FEATUREv6.1

    SAM3 AI-Box mode, one prompt for a whole crowd

    Drag a single bounding box around a cluster and SAM3 returns one shape per instance inside it. Built for parking lots, shelves, microscopy, and anything else where every visible object is the same kind of thing.

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  9. FEATUREv6.0

    Annotation JSON files store image paths, not pixels

    LabelMe v6 stops base64-embedding the image inside every annotation JSON by default. Files get an order of magnitude smaller, diffs become readable, and version control stops choking on the binary blob.

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  10. FEATUREv6.0

    Auto-save is on by default

    LabelMe v6 saves annotations as you work. The most common way to lose hours of labeling — forgetting to Ctrl+S before closing — is gone for new installs.

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  11. FEATUREv6.0

    Large image and TIFF support for satellite and aerial imagery

    LabelMe v6 opens multi-gigapixel images and float32 GeoTIFFs that v5 refused to load. Pan, zoom, and annotate a 26,000 x 22,000 px aerial tile without the app locking up.

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