Mark it. Show it.
A lightning-fast, dark-first PDF annotator that disappears until you need it—and plugs straight into OBS, Stream Deck, vMix, or any WebSocket-friendly workflow.
- Stays invisible until you need it
- True dark-mode with neon highlights
- Direct OBS/Stream Deck integration
- <10 MB install, <80 MB RAM usage
Annotations Workspace
Tool settings, color controls, and live markup while presenting
See the Actual UI
StreamSlate keeps your controls close while keeping your stream output clean.
Annotations Workspace
Tool settings, color controls, and live annotations while presenting.
Presenter View
Minimal output mode optimized for OBS browser source capture.
Settings Panel
Streaming-focused preferences including transparent background and borderless mode.
Built for Creators
Every feature designed with streaming and content creation in mind
Annotations
Highlight, underline, free-ink, shapes, and call-outs
✅Native Capture
ScreenCaptureKit integration for ultra-low latency on macOS
✅Dark-First UI
True inversion, neon palette that pops on camera
✅PDF Export
High-fidelity export with precise arrowheads and vectors
✅Presenter Mode
Borderless, transparent BG for clean streaming
✅OBS & Stream Deck
Hotkeys + WebSocket control for seamless workflow
✅Plug & Stream
Designed to work seamlessly with your existing streaming setup
OBS Studio
Add as Browser Source with auto-generated URL
Stream Deck
Control annotations with physical buttons
WebSocket API
Full control via local REST/WebSocket
Quick Start
$ streamslate MyDeck.pdf
Then add Browser Source in OBS:
http://localhost:11451/presenter
Ready to level up your streams?
Join creators using StreamSlate to engage their audience with crystal-clear annotations.