wkentaro/labelme
Image annotation with Python. Supports polygon, rectangle, circle, line, point, and AI-assisted annotation. observed · 2026-10-07
Health v2 · maintenance only
98/100
- Activity 98
- Release rhythm 98
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 7.5
- age_days: 3816
- days_rel: 14
- days_push: 14
- n_releases_24m: 41
Adoption not part of the score
16211 stars · 3710 forks observed · 2026-10-07
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Labelme is a graphical image annotation tool written in Python with a Qt interface, supporting polygon, rectangle, oriented rectangle, circle, line, and point shapes for creating labeled datasets. It also offers AI-assisted annotation with SAM2/SAM3 and YOLO-World models running fully offline, plus export to formats like VOC and YOLO.
Use cases
- annotate images with polygons for semantic segmentation
- draw bounding boxes for object detection datasets
- create instance segmentation training data
- label images for image classification
- AI-assisted click-to-segment annotation with SAM
- convert annotations to YOLO or VOC dataset formats
- annotate video frames for computer vision
- label keypoints with point annotations
When to choose
- you need a free, open-source, offline image labeling tool
- you are building segmentation or detection datasets in Python
- you want AI-assisted annotation without sending data to the cloud
- you need JSON annotations exportable to common ML formats
When to avoid
- you need collaborative, multi-user web-based annotation
- you want a no-install experience without Python (consider the paid standalone app)
- you need audio, text, or 3D annotation
- you require permissive licensing for redistribution (GPL-3.0)
Facets
application · maturity active
image-processing computer-vision machine-learning gui cli computer-vision image-processing machine-learning artificial-intelligence developer-tools python cross-platform windows image-annotation labeling segmentation bounding-boxes sam dataset-creation qt yolo voc polygon-annotation linux macos desktop
10 sources
- readme: https://github.com/wkentaro/labelme · fetched 2026-10-07 · e09160c29dde
- homepage: https://labelme.io · fetched 2026-10-12 · 0c2811adcc06
- site_page: https://labelme.io/docs · fetched 2026-10-12 · b83ee2a9f39e
- site_page: https://labelme.io/docs/install-labelme-app · fetched 2026-10-12 · 161c23139edb
- site_page: https://labelme.io/docs/install-toolkit · fetched 2026-10-12 · 1256f54a1207
- site_page: https://labelme.io/docs/starter-guide · fetched 2026-10-12 · 86dba6622a22
- site_page: https://labelme.io/docs/dataset-guide · fetched 2026-08-29 · 9c73afee309b
- site_page: https://labelme.io/docs/annotation-basics · fetched 2026-08-29 · 8f2e534b50d5
- site_page: https://labelme.io/changelog · fetched 2026-10-12 · b1543e04d66a
- site_page: https://labelme.io/pricing · fetched 2026-10-12 · 4856f828abaf
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| wkentaro/labelme | main | 98 |
For agents
markdown · JSON · MCP: product_card(name="wkentaro/labelme")
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem