Topics / #annotation

Annotation projects on GitHub

Data annotation platforms for labeling images, video, and text for machine learning.

As of , the most-starred Annotation projects on GitHub are supervision (51.2K stars), label-studio (28.5K stars) and screenity (18.8K stars). GitHub.Locker tracks 18 Annotation repositories with 214.2K stars combined. The fastest-growing on October 16 was plannotator, with +19 stars in a day.

18Projects
214.2KStars in total
+80Stars in a day
Browse in the catalog →github.com/topics/annotation ↗

Hot right now

Most stars gained in a day · Oct 16

+19

plannotator

backnotprop/plannotator · ★ 9.5K

Plannotator is a local, browser-based review surface for AI coding agents: when your agent proposes a plan, HTML, or finishes writing code, the work opens in your browser so you can annotate it and send feedback straight back to the agent.

+11

X-AnyLabeling

CVHub520/X-AnyLabeling · ★ 10.7K

A free cross-platform desktop app for AI-assisted annotation of text, image, video, and multimodal data — manual labeling tools plus built-in deep learning models that pre-label or batch-annotate, with multi-format export.

+9

supervision

roboflow/supervision · ★ 51.2K

Supervision is a Python library with reusable computer vision building blocks: detection/segmentation/classification result handling, annotators, trackers, and dataset utilities that plug into any model.

+8

agentation

benjitaylor/agentation · ★ 5K

Agentation is a visual feedback tool for AI coding agents: you click elements on your web page, add notes, and copy structured output that helps the agent find the exact code you are referring to.

The all-time top

18 projects · by stars

  1. #1 · roboflow/supervision

    supervision

    Supervision is a Python library with reusable computer vision building blocks: detection/segmentation/classification result handling, annotators, trackers, and dataset utilities that plug into any model.

    51.2K
  2. #2 · HumanSignal/label-studio

    label-studio

    Label Studio is an open source data labeling and annotation tool: you label audio, text, images, videos, and time series in a browser UI and export the results in formats ready for ML training.

    28.5K
  3. #3 · alyssaxuu/screenity

    screenity

    A free, privacy-friendly screen recorder and annotation tool for Chrome: record your screen or camera, annotate and edit the video, and export it — with no time limits and no sign-up.

    18.8K
  1. 4

    cvat

    16.9Kcvat-ai/cvat · Python

    CVAT is an open-source, self-hosted data annotation platform for building labeled datasets from images, video, and 3D point clouds, used for computer vision and visual AI projects.

  2. 5

    apexcharts.js

    15.2Kapexcharts/apexcharts.js · JavaScript

    ApexCharts is a JavaScript charting library for building interactive, SVG-based charts, designed for dashboards, SaaS products, and data-heavy UIs.

  3. 6

    zotero-pdf-translate

    12.1Kwindingwind/zotero-pdf-translate · TypeScript

    Zotero PDF Translate is a Zotero plugin that translates PDF, EPub, webpage, metadata, annotations, and notes into your target language.

  4. 7

    cleanlab

    11.7Kcleanlab/cleanlab · Python

    Cleanlab is an open-source Python library that automatically finds issues in ML datasets — label errors, outliers, duplicates — using your existing models, so that fixing the data trains better models.

  5. 8

    fiftyone

    11.2Kvoxel51/fiftyone · TypeScript

    FiftyOne is an open-source tool for building high-quality datasets and computer vision models: you use it to visualize and label your visual data, evaluate models, and find and fix data quality issues.

  6. 9

    PyMuPDF

    10.9Kpymupdf/PyMuPDF · Python

    PyMuPDF is a high-performance Python library for extracting, analyzing, converting, rendering, and manipulating PDF and other document formats, built on the MuPDF C engine.

  7. 10

    X-AnyLabeling

    10.7KCVHub520/X-AnyLabeling · Python

    A free cross-platform desktop app for AI-assisted annotation of text, image, video, and multimodal data — manual labeling tools plus built-in deep learning models that pre-label or batch-annotate, with multi-format export.

  8. 11

    pypdf

    10.3Kpy-pdf/pypdf · Python

    A free and open-source pure-python PDF library: it splits, merges, crops and transforms the pages of PDF files, and can add custom data, viewing options and passwords to them.

  9. 12

    plannotator

    9.5Kbacknotprop/plannotator · TypeScript

    Plannotator is a local, browser-based review surface for AI coding agents: when your agent proposes a plan, HTML, or finishes writing code, the work opens in your browser so you can annotate it and send feedback straight back to the agent.

  10. 13

    agentation

    5Kbenjitaylor/agentation · TypeScript

    Agentation is a visual feedback tool for AI coding agents: you click elements on your web page, add notes, and copy structured output that helps the agent find the exact code you are referring to.

  11. 14

    evals-skills

    1.5Kai-evals-course/evals-skills

    A collection of agent skills that guide AI coding agents to build product-specific AI evals — not foundation-model benchmarks. It encodes mistakes the authors saw across 50+ companies and thousands of students in their AI Evals course.

  12. 15

    TeamSync-PDF-Viewer

    245angelbot-ai/TeamSync-PDF-Viewer · TypeScript

    TeamSync PDF Viewer is an open-source, 100% client-side PDF viewer SDK for React apps, featuring annotations, secure redaction, forensic watermarking, and search, built on WebAssembly (PDF.js + pdf-lib).

  13. 16

    qiaomu-book-reader-legacy

    241joeseesun/qiaomu-book-reader-legacy · CSS

    Qiaomu Book Reader is an Obsidian plugin that lets you read EPUB, FB2 and PDF books inside Obsidian, highlight and annotate text, ask AI questions in place, and have your notes link back to the original passage.

  14. 17

    readingspace-mn

    153Awaker-OTE/readingspace-mn · JavaScript

    Reading Space MN is a reading workflow plugin for MarginNote 4 that brings AI explanation and Q&A, an in-app browser, audio read-aloud, and Obsidian export right next to your selections, excerpts, and mind-map cards.

  15. 18

    ParkerLabel

    109Parker-Lyu/ParkerLabel · Python

    ParkerLabel is a lightweight, AI-assisted interactive annotation tool for object detection and instance segmentation that uses MobileSAM to generate masks from click prompts.

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