Get the app
Download AnnotateIt
One product, four surfaces, and every one of them free. Windows and macOS carry the full annotation and dataset workflow fully offline with bundled default engines. WebGPU-gated models are offered in Windows, macOS and compatible desktop browsers with a working adapter. The web app takes seconds with nothing to install; iPhone & iPad cover annotating on the go.
The Windows, macOS and iPhone & iPad builds are versioned separately — each store shows the version it is offering.
Web
The fastest way to try AnnotateIt.
- Nothing to install — open it and create a project
- AI engines download on first use and are cached locally
- Full annotation workflow, dataset management and every export format
- Models page, custom ONNX import, semantic search and text-prompt tools — the same as desktop
- SAM 2.1 Large, SAM 3 Tracker and Grounding DINO need a browser with WebGPU
- Needs a modern desktop browser; no local REST API
Windows
Native desktop build for Windows 10 and 11.
- Default AI engines bundled — no downloads needed
- Works fully offline, start to finish
- Desktop-only extras: local REST API with access tokens, ChatGPT via Codex, Claude Code and OS-stored OpenAI/Anthropic API credentials
- Capture from webcams, screen sharing, video files and RTSP / HTTP network cameras via bundled FFmpeg
- Store-managed updates; media up to 4.7 GiB and videos up to 3 hours
- SAM 2.1 Large, SAM 3 Tracker and Grounding DINO need a working WebGPU adapter in WebView2
macOS
Native build for Apple silicon Macs.
- Default AI engines bundled — no downloads needed
- Works fully offline, start to finish
- Desktop-only extras: local REST API with access tokens, ChatGPT via Codex, Claude Code and OS-stored OpenAI/Anthropic API credentials
- Capture from webcams, video files and RTSP / HTTP network cameras via bundled FFmpeg
- Store-managed updates; media up to 4.7 GiB and videos up to 3 hours
- SAM 2.1 Large, SAM 3 Tracker and Grounding DINO need a working WebGPU adapter in WKWebView; screen capture is disabled in the native app
iPhone & iPad
Touch-first annotation on the go.
- Free with no project limit — and nothing to buy
- Built-in AI engines run on-device, fully offline
- Same projects, datasets, versions, quality checks and export formats
- Camera capture and local annotation; AI Assistant is unavailable on native iOS / Android
- No heavy engines, Models page, custom ONNX import, semantic search, text-prompt tools or local REST API
- Media caps: images to 32 MiB, video to 128 MiB or 10 minutes, archives to 128 MiB
Docker
A self-hosted container image for teams that run everything on their own infrastructure.
- Same local-first product, run on your own server
- For air-gapped and on-premise environments
- Not available yet — in active development
Free on every platform
All four builds are free — desktop adds offline work and local automation
Web, Windows, macOS and iPhone & iPad are free to use: no account, no sign-up, no trial period and no subscription. Nothing is time-limited, nothing is watermarked, and there is no project limit on any platform.
Windows and macOS add the local REST API, and bundle the default AI engines so the core assistance needs no first download. Windows and macOS offer SAM 2.1 Large, SAM 3 Tracker and Grounding DINO with a working WebGPU adapter, as does the web app in a compatible browser.
Compare all four platformsEngine availability also depends on hardware and runtime: mobile omits downloadable engines, while Windows, macOS and compatible desktop browsers offer SAM 2.1 Large, SAM 3 Tracker and Grounding DINO with a working WebGPU adapter.
Every build is the same local-first product
- No account and no sign-up
- Datasets, media, labels and annotations stay on your device
- Export COCO, YOLO, Pascal VOC, Datumaro, Supervisely Video, MOT, MOTS, KITTI and Plain ZIP; import the standard ones
- Dataset versions, quality checks, splits and activity history — free on every tier
- Free everywhere: unlimited projects on web, Windows, macOS and iPhone & iPad
Common questions
Which build should I pick?
Pick Windows or macOS for fully offline sessions, bundled default engines, desktop-only extras and store-managed updates. SAM 2.1 Large, SAM 3 Tracker and Grounding DINO are available in Windows, macOS and compatible desktop browsers with a working WebGPU adapter. iPhone and iPad are best as a companion away from a desk.
Is every platform free?
Yes. The web app, the Windows and macOS builds and the iPhone & iPad app all cost nothing to use — there is no account, no trial period, no subscription and no project limit, and every annotation tool, every bundled AI engine, all the dataset-management features and every import and export format are included. There is currently no paid upgrade.
What can I not do on iPhone and iPad?
The mobile builds run only the small built-in AI engines. The heavy downloadable engines, the Models page, custom ONNX import, semantic search and the text-prompt tools are unavailable, and uploads are capped at 32 MiB per image, 128 MiB or 10 minutes per video and 128 MiB per imported archive. That is a memory limit of the mobile WebView, not a licensing choice. The annotation workflow, every project type, unlimited projects, dataset versions, quality checks, splits and the same dataset annotation formats remain available. Image/video decoding still depends on the installed build and its codecs, with first-still, frame-timing and decoding limits described in the media documentation.
Does the web version work offline?
Once the app and the models you use are cached, annotation work runs locally. The native builds are the best choice for fully offline sessions.
Do the native apps phone home?
Annotation stores projects locally without an account. Desktop and mobile builds contain no analytics or telemetry; the website and web app use cookieless page analytics without project content. Optional AI Assistant sends chat context and the attached image/frame, labels and annotation context to the selected provider (OpenAI or Anthropic), and optional ML jobs send selected dataset bundles to your configured runner.
Pick your platform and start annotating
Install a native build — or skip the install entirely and open the web app.